Merge branch 'sh-latest' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6

* 'sh-latest' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: (23 commits)
  sh: Ignore R_SH_NONE module relocations.
  SH: SE7751: Fix pcibios_map_platform_irq prototype.
  sh: remove warning and warning_symbol from struct stacktrace_ops
  sh: wire up sys_sendmmsg.
  clocksource: sh_tmu: Runtime PM support
  clocksource: sh_tmu: __clocksource_updatefreq_hz() update
  clocksource: sh_cmt: Runtime PM support
  clocksource: sh_cmt: __clocksource_updatefreq_hz() update
  dmaengine: shdma: synchronize RCU before freeing, simplify spinlock
  dmaengine: shdma: add runtime- and system-level power management
  dmaengine: shdma: fix locking
  sh: sh-sci: sh7377 and sh73a0 build fixes
  sh: cosmetic improvement: use an existing pointer
  serial: sh-sci: suspend/resume wakeup support V2
  serial: sh-sci: Runtime PM support
  sh: select IRQ_FORCED_THREADING.
  sh: intc: Set virtual IRQs as nothread.
  sh: fixup fpu.o compile order
  i2c: add a module alias to the sh-mobile driver
  ALSA: add a module alias to the FSI driver
  ...

arch/sh/Kconfig

@@ -21,6 +21,7 @@ config SUPERH
 	select HAVE_REGS_AND_STACK_ACCESS_API
 	select HAVE_GENERIC_HARDIRQS
 	select HAVE_SPARSE_IRQ
+	select IRQ_FORCED_THREADING
 	select RTC_LIB
 	select GENERIC_ATOMIC64
 	select GENERIC_IRQ_SHOW

arch/sh/boards/mach-ecovec24/setup.c

@@ -482,7 +482,7 @@ static struct i2c_board_info ts_i2c_clients = {
 	.irq		= IRQ0,
 };
 
-#if defined(CONFIG_MMC_TMIO) || defined(CONFIG_MMC_TMIO_MODULE)
+#if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE)
 /* SDHI0 */
 static void sdhi0_set_pwr(struct platform_device *pdev, int state)
 {
@@ -522,7 +522,7 @@ static struct platform_device sdhi0_device = {
 	},
 };
 
-#if !defined(CONFIG_MMC_SH_MMCIF)
+#if !defined(CONFIG_MMC_SH_MMCIF) && !defined(CONFIG_MMC_SH_MMCIF_MODULE)
 /* SDHI1 */
 static void sdhi1_set_pwr(struct platform_device *pdev, int state)
 {
@@ -836,7 +836,7 @@ static struct platform_device vou_device = {
 	},
 };
 
-#if defined(CONFIG_MMC_SH_MMCIF)
+#if defined(CONFIG_MMC_SH_MMCIF) || defined(CONFIG_MMC_SH_MMCIF_MODULE)
 /* SH_MMCIF */
 static void mmcif_set_pwr(struct platform_device *pdev, int state)
 {
@@ -898,9 +898,9 @@ static struct platform_device *ecovec_devices[] __initdata = {
 	&ceu0_device,
 	&ceu1_device,
 	&keysc_device,
-#if defined(CONFIG_MMC_TMIO) || defined(CONFIG_MMC_TMIO_MODULE)
+#if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE)
 	&sdhi0_device,
-#if !defined(CONFIG_MMC_SH_MMCIF)
+#if !defined(CONFIG_MMC_SH_MMCIF) && !defined(CONFIG_MMC_SH_MMCIF_MODULE)
 	&sdhi1_device,
 #endif
 #else
@@ -912,7 +912,7 @@ static struct platform_device *ecovec_devices[] __initdata = {
 	&fsi_device,
 	&irda_device,
 	&vou_device,
-#if defined(CONFIG_MMC_SH_MMCIF)
+#if defined(CONFIG_MMC_SH_MMCIF) || defined(CONFIG_MMC_SH_MMCIF_MODULE)
 	&sh_mmcif_device,
 #endif
 };
@@ -1180,7 +1180,7 @@ static int __init arch_setup(void)
 	gpio_direction_input(GPIO_PTR5);
 	gpio_direction_input(GPIO_PTR6);
 
-#if defined(CONFIG_MMC_TMIO) || defined(CONFIG_MMC_TMIO_MODULE)
+#if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE)
 	/* enable SDHI0 on CN11 (needs DS2.4 set to ON) */
 	gpio_request(GPIO_FN_SDHI0CD,  NULL);
 	gpio_request(GPIO_FN_SDHI0WP,  NULL);
@@ -1193,7 +1193,7 @@ static int __init arch_setup(void)
 	gpio_request(GPIO_PTB6, NULL);
 	gpio_direction_output(GPIO_PTB6, 0);
 
-#if !defined(CONFIG_MMC_SH_MMCIF)
+#if !defined(CONFIG_MMC_SH_MMCIF) && !defined(CONFIG_MMC_SH_MMCIF_MODULE)
 	/* enable SDHI1 on CN12 (needs DS2.6,7 set to ON,OFF) */
 	gpio_request(GPIO_FN_SDHI1CD,  NULL);
 	gpio_request(GPIO_FN_SDHI1WP,  NULL);
@@ -1284,7 +1284,7 @@ static int __init arch_setup(void)
 	gpio_request(GPIO_PTU5, NULL);
 	gpio_direction_output(GPIO_PTU5, 0);
 
-#if defined(CONFIG_MMC_SH_MMCIF)
+#if defined(CONFIG_MMC_SH_MMCIF) || defined(CONFIG_MMC_SH_MMCIF_MODULE)
 	/* enable MMCIF (needs DS2.6,7 set to OFF,ON) */
 	gpio_request(GPIO_FN_MMC_D7, NULL);
 	gpio_request(GPIO_FN_MMC_D6, NULL);

arch/sh/configs/ecovec24_defconfig

@@ -115,7 +115,7 @@ CONFIG_USB_GADGET=y
 CONFIG_USB_FILE_STORAGE=m
 CONFIG_MMC=y
 CONFIG_MMC_SPI=y
-CONFIG_MMC_TMIO=y
+CONFIG_MMC_SDHI=y
 CONFIG_RTC_CLASS=y
 CONFIG_RTC_DRV_RS5C372=y
 CONFIG_UIO=y

arch/sh/configs/sh7757lcr_defconfig

@@ -70,7 +70,7 @@ CONFIG_USB_EHCI_HCD=y
 CONFIG_USB_OHCI_HCD=y
 CONFIG_USB_STORAGE=y
 CONFIG_MMC=y
-CONFIG_MMC_TMIO=y
+CONFIG_MMC_SDHI=y
 CONFIG_MMC_SH_MMCIF=y
 CONFIG_EXT2_FS=y
 CONFIG_EXT3_FS=y

arch/sh/drivers/pci/fixups-se7751.c

@@ -6,7 +6,7 @@
 #include <linux/io.h>
 #include "pci-sh4.h"
 
-int __init pcibios_map_platform_irq(u8 slot, u8 pin)
+int __init pcibios_map_platform_irq(struct pci_dev *, u8 slot, u8 pin)
 {
         switch (slot) {
         case 0: return 13;

arch/sh/include/asm/stacktrace.h

@@ -10,9 +10,6 @@
 /* Generic stack tracer with callbacks */
 
 struct stacktrace_ops {
-	void (*warning)(void *data, char *msg);
-	/* msg must contain %s for the symbol */
-	void (*warning_symbol)(void *data, char *msg, unsigned long symbol);
 	void (*address)(void *data, unsigned long address, int reliable);
 	/* On negative return stop dumping */
 	int (*stack)(void *data, char *name);

arch/sh/include/asm/unistd_32.h

@@ -373,8 +373,9 @@
 #define __NR_open_by_handle_at	360
 #define __NR_clock_adjtime	361
 #define __NR_syncfs		362
+#define __NR_sendmmsg		363
 
-#define NR_syscalls 363
+#define NR_syscalls 364
 
 #ifdef __KERNEL__
 

arch/sh/include/asm/unistd_64.h

@@ -394,10 +394,11 @@
 #define __NR_open_by_handle_at	371
 #define __NR_clock_adjtime	372
 #define __NR_syncfs		373
+#define __NR_sendmmsg		374
 
 #ifdef __KERNEL__
 
-#define NR_syscalls 374
+#define NR_syscalls 375
 
 #define __ARCH_WANT_IPC_PARSE_VERSION
 #define __ARCH_WANT_OLD_READDIR

arch/sh/kernel/cpu/Makefile

@@ -17,7 +17,5 @@ obj-$(CONFIG_ARCH_SHMOBILE)	+= shmobile/
 
 obj-$(CONFIG_SH_ADC)		+= adc.o
 obj-$(CONFIG_SH_CLK_CPG_LEGACY)	+= clock-cpg.o
-obj-$(CONFIG_SH_FPU)		+= fpu.o
-obj-$(CONFIG_SH_FPU_EMU)	+= fpu.o
 
-obj-y	+= irq/ init.o clock.o hwblk.o proc.o
+obj-y	+= irq/ init.o clock.o fpu.o hwblk.o proc.o

arch/sh/kernel/cpu/shmobile/pm_runtime.c

@@ -157,7 +157,7 @@ static int default_platform_runtime_suspend(struct device *dev)
 	might_sleep();
 
 	/* catch misconfigured drivers not starting with resume */
-	if (test_bit(PDEV_ARCHDATA_FLAG_INIT, &pdev->archdata.flags)) {
+	if (test_bit(PDEV_ARCHDATA_FLAG_INIT, &ad->flags)) {
 		ret = -EINVAL;
 		goto out;
 	}
@@ -170,8 +170,8 @@ static int default_platform_runtime_suspend(struct device *dev)
 
 	/* put device on idle list */
 	spin_lock_irqsave(&hwblk_lock, flags);
-	list_add_tail(&pdev->archdata.entry, &hwblk_idle_list);
-	__set_bit(PDEV_ARCHDATA_FLAG_IDLE, &pdev->archdata.flags);
+	list_add_tail(&ad->entry, &hwblk_idle_list);
+	__set_bit(PDEV_ARCHDATA_FLAG_IDLE, &ad->flags);
 	spin_unlock_irqrestore(&hwblk_lock, flags);
 
 	/* increase idle count */

arch/sh/kernel/dumpstack.c

@@ -69,19 +69,6 @@ stack_reader_dump(struct task_struct *task, struct pt_regs *regs,
 	}
 }
 
-static void
-print_trace_warning_symbol(void *data, char *msg, unsigned long symbol)
-{
-	printk(data);
-	print_symbol(msg, symbol);
-	printk("\n");
-}
-
-static void print_trace_warning(void *data, char *msg)
-{
-	printk("%s%s\n", (char *)data, msg);
-}
-
 static int print_trace_stack(void *data, char *name)
 {
 	printk("%s <%s> ", (char *)data, name);
@@ -98,8 +85,6 @@ static void print_trace_address(void *data, unsigned long addr, int reliable)
 }
 
 static const struct stacktrace_ops print_trace_ops = {
-	.warning = print_trace_warning,
-	.warning_symbol = print_trace_warning_symbol,
 	.stack = print_trace_stack,
 	.address = print_trace_address,
 };

arch/sh/kernel/module.c

@@ -93,6 +93,8 @@ int apply_relocate_add(Elf32_Shdr *sechdrs,
 #endif
 
 		switch (ELF32_R_TYPE(rel[i].r_info)) {
+		case R_SH_NONE:
+			break;
 		case R_SH_DIR32:
 			value = get_unaligned(location);
 			value += relocation;

arch/sh/kernel/perf_callchain.c

@@ -14,16 +14,6 @@
 #include <asm/unwinder.h>
 #include <asm/ptrace.h>
 
-
-static void callchain_warning(void *data, char *msg)
-{
-}
-
-static void
-callchain_warning_symbol(void *data, char *msg, unsigned long symbol)
-{
-}
-
 static int callchain_stack(void *data, char *name)
 {
 	return 0;
@@ -38,8 +28,6 @@ static void callchain_address(void *data, unsigned long addr, int reliable)
 }
 
 static const struct stacktrace_ops callchain_ops = {
-	.warning	= callchain_warning,
-	.warning_symbol	= callchain_warning_symbol,
 	.stack		= callchain_stack,
 	.address	= callchain_address,
 };

arch/sh/kernel/stacktrace.c

@@ -17,15 +17,6 @@
 #include <asm/ptrace.h>
 #include <asm/stacktrace.h>
 
-static void save_stack_warning(void *data, char *msg)
-{
-}
-
-static void
-save_stack_warning_symbol(void *data, char *msg, unsigned long symbol)
-{
-}
-
 static int save_stack_stack(void *data, char *name)
 {
 	return 0;
@@ -51,8 +42,6 @@ static void save_stack_address(void *data, unsigned long addr, int reliable)
 }
 
 static const struct stacktrace_ops save_stack_ops = {
-	.warning = save_stack_warning,
-	.warning_symbol = save_stack_warning_symbol,
 	.stack = save_stack_stack,
 	.address = save_stack_address,
 };
@@ -88,8 +77,6 @@ save_stack_address_nosched(void *data, unsigned long addr, int reliable)
 }
 
 static const struct stacktrace_ops save_stack_ops_nosched = {
-	.warning = save_stack_warning,
-	.warning_symbol = save_stack_warning_symbol,
 	.stack = save_stack_stack,
 	.address = save_stack_address_nosched,
 };

arch/sh/kernel/syscalls_32.S

@@ -380,3 +380,4 @@ ENTRY(sys_call_table)
 	.long sys_open_by_handle_at	/* 360 */
 	.long sys_clock_adjtime
 	.long sys_syncfs
+	.long sys_sendmmsg

arch/sh/kernel/syscalls_64.S

@@ -400,3 +400,4 @@ sys_call_table:
 	.long sys_open_by_handle_at
 	.long sys_clock_adjtime
 	.long sys_syncfs
+	.long sys_sendmmsg

arch/sh/oprofile/backtrace.c

@@ -23,17 +23,6 @@
 #include <asm/sections.h>
 #include <asm/stacktrace.h>
 
-static void backtrace_warning_symbol(void *data, char *msg,
-				     unsigned long symbol)
-{
-	/* Ignore warnings */
-}
-
-static void backtrace_warning(void *data, char *msg)
-{
-	/* Ignore warnings */
-}
-
 static int backtrace_stack(void *data, char *name)
 {
 	/* Yes, we want all stacks */
@@ -49,8 +38,6 @@ static void backtrace_address(void *data, unsigned long addr, int reliable)
 }
 
 static struct stacktrace_ops backtrace_ops = {
-	.warning = backtrace_warning,
-	.warning_symbol = backtrace_warning_symbol,
 	.stack = backtrace_stack,
 	.address = backtrace_address,
 };

drivers/clocksource/sh_cmt.c

@@ -24,6 +24,7 @@
 #include <linux/ioport.h>
 #include <linux/io.h>
 #include <linux/clk.h>
+#include <linux/pm_runtime.h>
 #include <linux/irq.h>
 #include <linux/err.h>
 #include <linux/clocksource.h>
@@ -152,10 +153,12 @@ static int sh_cmt_enable(struct sh_cmt_priv *p, unsigned long *rate)
 {
 	int ret;
 
-	/* enable clock */
+	/* wake up device and enable clock */
+	pm_runtime_get_sync(&p->pdev->dev);
 	ret = clk_enable(p->clk);
 	if (ret) {
 		dev_err(&p->pdev->dev, "cannot enable clock\n");
+		pm_runtime_put_sync(&p->pdev->dev);
 		return ret;
 	}
 
@@ -187,8 +190,9 @@ static void sh_cmt_disable(struct sh_cmt_priv *p)
 	/* disable interrupts in CMT block */
 	sh_cmt_write(p, CMCSR, 0);
 
-	/* stop clock */
+	/* stop clock and mark device as idle */
 	clk_disable(p->clk);
+	pm_runtime_put_sync(&p->pdev->dev);
 }
 
 /* private flags */
@@ -416,11 +420,15 @@ static cycle_t sh_cmt_clocksource_read(struct clocksource *cs)
 
 static int sh_cmt_clocksource_enable(struct clocksource *cs)
 {
+	int ret;
 	struct sh_cmt_priv *p = cs_to_sh_cmt(cs);
 
 	p->total_cycles = 0;
 
-	return sh_cmt_start(p, FLAG_CLOCKSOURCE);
+	ret = sh_cmt_start(p, FLAG_CLOCKSOURCE);
+	if (!ret)
+		__clocksource_updatefreq_hz(cs, p->rate);
+	return ret;
 }
 
 static void sh_cmt_clocksource_disable(struct clocksource *cs)
@@ -448,19 +456,10 @@ static int sh_cmt_register_clocksource(struct sh_cmt_priv *p,
 	cs->mask = CLOCKSOURCE_MASK(sizeof(unsigned long) * 8);
 	cs->flags = CLOCK_SOURCE_IS_CONTINUOUS;
 
-	/* clk_get_rate() needs an enabled clock */
-	clk_enable(p->clk);
-	p->rate = clk_get_rate(p->clk) / ((p->width == 16) ? 512 : 8);
-	clk_disable(p->clk);
-
-	/* TODO: calculate good shift from rate and counter bit width */
-	cs->shift = 0;
-	cs->mult = clocksource_hz2mult(p->rate, cs->shift);
-
 	dev_info(&p->pdev->dev, "used as clock source\n");
 
-	clocksource_register(cs);
-
+	/* Register with dummy 1 Hz value, gets updated in ->enable() */
+	clocksource_register_hz(cs, 1);
 	return 0;
 }
 
@@ -665,6 +664,7 @@ static int __devinit sh_cmt_probe(struct platform_device *pdev)
 
 	if (p) {
 		dev_info(&pdev->dev, "kept as earlytimer\n");
+		pm_runtime_enable(&pdev->dev);
 		return 0;
 	}
 
@@ -679,6 +679,9 @@ static int __devinit sh_cmt_probe(struct platform_device *pdev)
 		kfree(p);
 		platform_set_drvdata(pdev, NULL);
 	}
+
+	if (!is_early_platform_device(pdev))
+		pm_runtime_enable(&pdev->dev);
 	return ret;
 }
 

drivers/clocksource/sh_tmu.c

@@ -25,6 +25,7 @@
 #include <linux/delay.h>
 #include <linux/io.h>
 #include <linux/clk.h>
+#include <linux/pm_runtime.h>
 #include <linux/irq.h>
 #include <linux/err.h>
 #include <linux/clocksource.h>
@@ -109,10 +110,12 @@ static int sh_tmu_enable(struct sh_tmu_priv *p)
 {
 	int ret;
 
-	/* enable clock */
+	/* wake up device and enable clock */
+	pm_runtime_get_sync(&p->pdev->dev);
 	ret = clk_enable(p->clk);
 	if (ret) {
 		dev_err(&p->pdev->dev, "cannot enable clock\n");
+		pm_runtime_put_sync(&p->pdev->dev);
 		return ret;
 	}
 
@@ -141,8 +144,9 @@ static void sh_tmu_disable(struct sh_tmu_priv *p)
 	/* disable interrupts in TMU block */
 	sh_tmu_write(p, TCR, 0x0000);
 
-	/* stop clock */
+	/* stop clock and mark device as idle */
 	clk_disable(p->clk);
+	pm_runtime_put_sync(&p->pdev->dev);
 }
 
 static void sh_tmu_set_next(struct sh_tmu_priv *p, unsigned long delta,
@@ -199,8 +203,12 @@ static cycle_t sh_tmu_clocksource_read(struct clocksource *cs)
 static int sh_tmu_clocksource_enable(struct clocksource *cs)
 {
 	struct sh_tmu_priv *p = cs_to_sh_tmu(cs);
+	int ret;
 
-	return sh_tmu_enable(p);
+	ret = sh_tmu_enable(p);
+	if (!ret)
+		__clocksource_updatefreq_hz(cs, p->rate);
+	return ret;
 }
 
 static void sh_tmu_clocksource_disable(struct clocksource *cs)
@@ -221,17 +229,10 @@ static int sh_tmu_register_clocksource(struct sh_tmu_priv *p,
 	cs->mask = CLOCKSOURCE_MASK(32);
 	cs->flags = CLOCK_SOURCE_IS_CONTINUOUS;
 
-	/* clk_get_rate() needs an enabled clock */
-	clk_enable(p->clk);
-	/* channel will be configured at parent clock / 4 */
-	p->rate = clk_get_rate(p->clk) / 4;
-	clk_disable(p->clk);
-	/* TODO: calculate good shift from rate and counter bit width */
-	cs->shift = 10;
-	cs->mult = clocksource_hz2mult(p->rate, cs->shift);
-
 	dev_info(&p->pdev->dev, "used as clock source\n");
-	clocksource_register(cs);
+
+	/* Register with dummy 1 Hz value, gets updated in ->enable() */
+	clocksource_register_hz(cs, 1);
 	return 0;
 }
 
@@ -414,6 +415,7 @@ static int __devinit sh_tmu_probe(struct platform_device *pdev)
 
 	if (p) {
 		dev_info(&pdev->dev, "kept as earlytimer\n");
+		pm_runtime_enable(&pdev->dev);
 		return 0;
 	}
 
@@ -428,6 +430,9 @@ static int __devinit sh_tmu_probe(struct platform_device *pdev)
 		kfree(p);
 		platform_set_drvdata(pdev, NULL);
 	}
+
+	if (!is_early_platform_device(pdev))
+		pm_runtime_enable(&pdev->dev);
 	return ret;
 }
 

drivers/dma/shdma.c

@@ -48,7 +48,7 @@ enum sh_dmae_desc_status {
 
 /*
  * Used for write-side mutual exclusion for the global device list,
- * read-side synchronization by way of RCU.
+ * read-side synchronization by way of RCU, and per-controller data.
  */
 static DEFINE_SPINLOCK(sh_dmae_lock);
 static LIST_HEAD(sh_dmae_devices);
@@ -85,22 +85,35 @@ static void dmaor_write(struct sh_dmae_device *shdev, u16 data)
  */
 static void sh_dmae_ctl_stop(struct sh_dmae_device *shdev)
 {
-	unsigned short dmaor = dmaor_read(shdev);
+	unsigned short dmaor;
+	unsigned long flags;
+
+	spin_lock_irqsave(&sh_dmae_lock, flags);
 
+	dmaor = dmaor_read(shdev);
 	dmaor_write(shdev, dmaor & ~(DMAOR_NMIF | DMAOR_AE | DMAOR_DME));
+
+	spin_unlock_irqrestore(&sh_dmae_lock, flags);
 }
 
 static int sh_dmae_rst(struct sh_dmae_device *shdev)
 {
 	unsigned short dmaor;
+	unsigned long flags;
 
-	sh_dmae_ctl_stop(shdev);
-	dmaor = dmaor_read(shdev) | shdev->pdata->dmaor_init;
+	spin_lock_irqsave(&sh_dmae_lock, flags);
 
-	dmaor_write(shdev, dmaor);
-	if (dmaor_read(shdev) & (DMAOR_AE | DMAOR_NMIF)) {
-		pr_warning("dma-sh: Can't initialize DMAOR.\n");
-		return -EINVAL;
+	dmaor = dmaor_read(shdev) & ~(DMAOR_NMIF | DMAOR_AE | DMAOR_DME);
+
+	dmaor_write(shdev, dmaor | shdev->pdata->dmaor_init);
+
+	dmaor = dmaor_read(shdev);
+
+	spin_unlock_irqrestore(&sh_dmae_lock, flags);
+
+	if (dmaor & (DMAOR_AE | DMAOR_NMIF)) {
+		dev_warn(shdev->common.dev, "Can't initialize DMAOR.\n");
+		return -EIO;
 	}
 	return 0;
 }
@@ -184,7 +197,7 @@ static void dmae_init(struct sh_dmae_chan *sh_chan)
 
 static int dmae_set_chcr(struct sh_dmae_chan *sh_chan, u32 val)
 {
-	/* When DMA was working, can not set data to CHCR */
+	/* If DMA is active, cannot set CHCR. TODO: remove this superfluous check */
 	if (dmae_is_busy(sh_chan))
 		return -EBUSY;
 
@@ -374,7 +387,12 @@ static void sh_dmae_free_chan_resources(struct dma_chan *chan)
 	LIST_HEAD(list);
 	int descs = sh_chan->descs_allocated;
 
+	/* Protect against ISR */
+	spin_lock_irq(&sh_chan->desc_lock);
 	dmae_halt(sh_chan);
+	spin_unlock_irq(&sh_chan->desc_lock);
+
+	/* Now no new interrupts will occur */
 
 	/* Prepared and not submitted descriptors can still be on the queue */
 	if (!list_empty(&sh_chan->ld_queue))
@@ -384,6 +402,7 @@ static void sh_dmae_free_chan_resources(struct dma_chan *chan)
 		/* The caller is holding dma_list_mutex */
 		struct sh_dmae_slave *param = chan->private;
 		clear_bit(param->slave_id, sh_dmae_slave_used);
+		chan->private = NULL;
 	}
 
 	spin_lock_bh(&sh_chan->desc_lock);
@@ -563,8 +582,6 @@ static struct dma_async_tx_descriptor *sh_dmae_prep_memcpy(
 	if (!chan || !len)
 		return NULL;
 
-	chan->private = NULL;
-
 	sh_chan = to_sh_chan(chan);
 
 	sg_init_table(&sg, 1);
@@ -620,9 +637,9 @@ static int sh_dmae_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
 	if (!chan)
 		return -EINVAL;
 
+	spin_lock_bh(&sh_chan->desc_lock);
 	dmae_halt(sh_chan);
 
-	spin_lock_bh(&sh_chan->desc_lock);
 	if (!list_empty(&sh_chan->ld_queue)) {
 		/* Record partial transfer */
 		struct sh_desc *desc = list_entry(sh_chan->ld_queue.next,
@@ -716,6 +733,14 @@ static dma_async_tx_callback __ld_cleanup(struct sh_dmae_chan *sh_chan, bool all
 			list_move(&desc->node, &sh_chan->ld_free);
 		}
 	}
+
+	if (all && !callback)
+		/*
+		 * Terminating and the loop completed normally: forgive
+		 * uncompleted cookies
+		 */
+		sh_chan->completed_cookie = sh_chan->common.cookie;
+
 	spin_unlock_bh(&sh_chan->desc_lock);
 
 	if (callback)
@@ -733,10 +758,6 @@ static void sh_dmae_chan_ld_cleanup(struct sh_dmae_chan *sh_chan, bool all)
 {
 	while (__ld_cleanup(sh_chan, all))
 		;
-
-	if (all)
-		/* Terminating - forgive uncompleted cookies */
-		sh_chan->completed_cookie = sh_chan->common.cookie;
 }
 
 static void sh_chan_xfer_ld_queue(struct sh_dmae_chan *sh_chan)
@@ -782,8 +803,10 @@ static enum dma_status sh_dmae_tx_status(struct dma_chan *chan,
 
 	sh_dmae_chan_ld_cleanup(sh_chan, false);
 
-	last_used = chan->cookie;
+	/* First read completed cookie to avoid a skew */
 	last_complete = sh_chan->completed_cookie;
+	rmb();
+	last_used = chan->cookie;
 	BUG_ON(last_complete < 0);
 	dma_set_tx_state(txstate, last_complete, last_used, 0);
 
@@ -813,8 +836,12 @@ static enum dma_status sh_dmae_tx_status(struct dma_chan *chan,
 static irqreturn_t sh_dmae_interrupt(int irq, void *data)
 {
 	irqreturn_t ret = IRQ_NONE;
-	struct sh_dmae_chan *sh_chan = (struct sh_dmae_chan *)data;
-	u32 chcr = sh_dmae_readl(sh_chan, CHCR);
+	struct sh_dmae_chan *sh_chan = data;
+	u32 chcr;
+
+	spin_lock(&sh_chan->desc_lock);
+
+	chcr = sh_dmae_readl(sh_chan, CHCR);
 
 	if (chcr & CHCR_TE) {
 		/* DMA stop */
@@ -824,10 +851,13 @@ static irqreturn_t sh_dmae_interrupt(int irq, void *data)
 		tasklet_schedule(&sh_chan->tasklet);
 	}
 
+	spin_unlock(&sh_chan->desc_lock);
+
 	return ret;
 }
 
-static unsigned int sh_dmae_reset(struct sh_dmae_device *shdev)
+/* Called from error IRQ or NMI */
+static bool sh_dmae_reset(struct sh_dmae_device *shdev)
 {
 	unsigned int handled = 0;
 	int i;
@@ -839,22 +869,32 @@ static unsigned int sh_dmae_reset(struct sh_dmae_device *shdev)
 	for (i = 0; i < SH_DMAC_MAX_CHANNELS; i++) {
 		struct sh_dmae_chan *sh_chan = shdev->chan[i];
 		struct sh_desc *desc;
+		LIST_HEAD(dl);
 
 		if (!sh_chan)
 			continue;
 
+		spin_lock(&sh_chan->desc_lock);
+
 		/* Stop the channel */
 		dmae_halt(sh_chan);
 
+		list_splice_init(&sh_chan->ld_queue, &dl);
+
+		spin_unlock(&sh_chan->desc_lock);
+
 		/* Complete all  */
-		list_for_each_entry(desc, &sh_chan->ld_queue, node) {
+		list_for_each_entry(desc, &dl, node) {
 			struct dma_async_tx_descriptor *tx = &desc->async_tx;
 			desc->mark = DESC_IDLE;
 			if (tx->callback)
 				tx->callback(tx->callback_param);
 		}
 
-		list_splice_init(&sh_chan->ld_queue, &sh_chan->ld_free);
+		spin_lock(&sh_chan->desc_lock);
+		list_splice(&dl, &sh_chan->ld_free);
+		spin_unlock(&sh_chan->desc_lock);
+
 		handled++;
 	}
 
@@ -867,10 +907,11 @@ static irqreturn_t sh_dmae_err(int irq, void *data)
 {
 	struct sh_dmae_device *shdev = data;
 
-	if (dmaor_read(shdev) & DMAOR_AE)
-		return IRQ_RETVAL(sh_dmae_reset(data));
-	else
+	if (!(dmaor_read(shdev) & DMAOR_AE))
 		return IRQ_NONE;
+
+	sh_dmae_reset(data);
+	return IRQ_HANDLED;
 }
 
 static void dmae_do_tasklet(unsigned long data)
@@ -902,17 +943,11 @@ static void dmae_do_tasklet(unsigned long data)
 
 static bool sh_dmae_nmi_notify(struct sh_dmae_device *shdev)
 {
-	unsigned int handled;
-
 	/* Fast path out if NMIF is not asserted for this controller */
 	if ((dmaor_read(shdev) & DMAOR_NMIF) == 0)
 		return false;
 
-	handled = sh_dmae_reset(shdev);
-	if (handled)
-		return true;
-
-	return false;
+	return sh_dmae_reset(shdev);
 }
 
 static int sh_dmae_nmi_handler(struct notifier_block *self,
@@ -982,9 +1017,6 @@ static int __devinit sh_dmae_chan_probe(struct sh_dmae_device *shdev, int id,
 	tasklet_init(&new_sh_chan->tasklet, dmae_do_tasklet,
 			(unsigned long)new_sh_chan);
 
-	/* Init the channel */
-	dmae_init(new_sh_chan);
-
 	spin_lock_init(&new_sh_chan->desc_lock);
 
 	/* Init descripter manage list */
@@ -1045,7 +1077,6 @@ static int __init sh_dmae_probe(struct platform_device *pdev)
 	struct sh_dmae_pdata *pdata = pdev->dev.platform_data;
 	unsigned long irqflags = IRQF_DISABLED,
 		chan_flag[SH_DMAC_MAX_CHANNELS] = {};
-	unsigned long flags;
 	int errirq, chan_irq[SH_DMAC_MAX_CHANNELS];
 	int err, i, irq_cnt = 0, irqres = 0;
 	struct sh_dmae_device *shdev;
@@ -1111,11 +1142,11 @@ static int __init sh_dmae_probe(struct platform_device *pdev)
 	pm_runtime_enable(&pdev->dev);
 	pm_runtime_get_sync(&pdev->dev);
 
-	spin_lock_irqsave(&sh_dmae_lock, flags);
+	spin_lock_irq(&sh_dmae_lock);
 	list_add_tail_rcu(&shdev->node, &sh_dmae_devices);
-	spin_unlock_irqrestore(&sh_dmae_lock, flags);
+	spin_unlock_irq(&sh_dmae_lock);
 
-	/* reset dma controller */
+	/* reset dma controller - only needed as a test */
 	err = sh_dmae_rst(shdev);
 	if (err)
 		goto rst_err;
@@ -1218,15 +1249,18 @@ eirqres:
 eirq_err:
 #endif
 rst_err:
-	spin_lock_irqsave(&sh_dmae_lock, flags);
+	spin_lock_irq(&sh_dmae_lock);
 	list_del_rcu(&shdev->node);
-	spin_unlock_irqrestore(&sh_dmae_lock, flags);
+	spin_unlock_irq(&sh_dmae_lock);
 
 	pm_runtime_put(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
+
 	if (dmars)
 		iounmap(shdev->dmars);
 emapdmars:
 	iounmap(shdev->chan_reg);
+	synchronize_rcu();
 emapchan:
 	kfree(shdev);
 ealloc:
@@ -1242,7 +1276,6 @@ static int __exit sh_dmae_remove(struct platform_device *pdev)
 {
 	struct sh_dmae_device *shdev = platform_get_drvdata(pdev);
 	struct resource *res;
-	unsigned long flags;
 	int errirq = platform_get_irq(pdev, 0);
 
 	dma_async_device_unregister(&shdev->common);
@@ -1250,9 +1283,9 @@ static int __exit sh_dmae_remove(struct platform_device *pdev)
 	if (errirq > 0)
 		free_irq(errirq, shdev);
 
-	spin_lock_irqsave(&sh_dmae_lock, flags);
+	spin_lock_irq(&sh_dmae_lock);
 	list_del_rcu(&shdev->node);
-	spin_unlock_irqrestore(&sh_dmae_lock, flags);
+	spin_unlock_irq(&sh_dmae_lock);
 
 	/* channel data remove */
 	sh_dmae_chan_remove(shdev);
@@ -1263,6 +1296,7 @@ static int __exit sh_dmae_remove(struct platform_device *pdev)
 		iounmap(shdev->dmars);
 	iounmap(shdev->chan_reg);
 
+	synchronize_rcu();
 	kfree(shdev);
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -1281,12 +1315,78 @@ static void sh_dmae_shutdown(struct platform_device *pdev)
 	sh_dmae_ctl_stop(shdev);
 }
 
+static int sh_dmae_runtime_suspend(struct device *dev)
+{
+	return 0;
+}
+
+static int sh_dmae_runtime_resume(struct device *dev)
+{
+	struct sh_dmae_device *shdev = dev_get_drvdata(dev);
+
+	return sh_dmae_rst(shdev);
+}
+
+#ifdef CONFIG_PM
+static int sh_dmae_suspend(struct device *dev)
+{
+	struct sh_dmae_device *shdev = dev_get_drvdata(dev);
+	int i;
+
+	for (i = 0; i < shdev->pdata->channel_num; i++) {
+		struct sh_dmae_chan *sh_chan = shdev->chan[i];
+		if (sh_chan->descs_allocated)
+			sh_chan->pm_error = pm_runtime_put_sync(dev);
+	}
+
+	return 0;
+}
+
+static int sh_dmae_resume(struct device *dev)
+{
+	struct sh_dmae_device *shdev = dev_get_drvdata(dev);
+	int i;
+
+	for (i = 0; i < shdev->pdata->channel_num; i++) {
+		struct sh_dmae_chan *sh_chan = shdev->chan[i];
+		struct sh_dmae_slave *param = sh_chan->common.private;
+
+		if (!sh_chan->descs_allocated)
+			continue;
+
+		if (!sh_chan->pm_error)
+			pm_runtime_get_sync(dev);
+
+		if (param) {
+			const struct sh_dmae_slave_config *cfg = param->config;
+			dmae_set_dmars(sh_chan, cfg->mid_rid);
+			dmae_set_chcr(sh_chan, cfg->chcr);
+		} else {
+			dmae_init(sh_chan);
+		}
+	}
+
+	return 0;
+}
+#else
+#define sh_dmae_suspend NULL
+#define sh_dmae_resume NULL
+#endif
+
+const struct dev_pm_ops sh_dmae_pm = {
+	.suspend		= sh_dmae_suspend,
+	.resume			= sh_dmae_resume,
+	.runtime_suspend	= sh_dmae_runtime_suspend,
+	.runtime_resume		= sh_dmae_runtime_resume,
+};
+
 static struct platform_driver sh_dmae_driver = {
 	.remove		= __exit_p(sh_dmae_remove),
 	.shutdown	= sh_dmae_shutdown,
 	.driver = {
 		.owner	= THIS_MODULE,
 		.name	= "sh-dma-engine",
+		.pm	= &sh_dmae_pm,
 	},
 };
 

drivers/dma/shdma.h

@@ -37,6 +37,7 @@ struct sh_dmae_chan {
 	int id;				/* Raw id of this channel */
 	u32 __iomem *base;
 	char dev_id[16];		/* unique name per DMAC of channel */
+	int pm_error;
 };
 
 struct sh_dmae_device {

drivers/i2c/busses/i2c-sh_mobile.c

@@ -729,3 +729,4 @@ module_exit(sh_mobile_i2c_adap_exit);
 MODULE_DESCRIPTION("SuperH Mobile I2C Bus Controller driver");
 MODULE_AUTHOR("Magnus Damm");
 MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:i2c-sh_mobile");

drivers/sh/clk/cpg.c

@@ -105,7 +105,7 @@ static int sh_clk_div6_set_parent(struct clk *clk, struct clk *parent)
 
 	/* Rebuild the frequency table */
 	clk_rate_table_build(clk, clk->freq_table, table->nr_divisors,
-			     table, &clk->arch_flags);
+			     table, NULL);
 
 	return 0;
 }

drivers/sh/intc/virq.c

@@ -235,6 +235,11 @@ restart:
 
 		irq_set_handler_data(irq, (void *)entry->handle);
 
+		/*
+		 * Set the virtual IRQ as non-threadable.
+		 */
+		irq_set_nothread(irq);
+
 		irq_set_chained_handler(entry->pirq, intc_virq_handler);
 		add_virq_to_pirq(entry->pirq, irq);
 

drivers/tty/serial/sh-sci.c

@@ -41,6 +41,7 @@
 #include <linux/platform_device.h>
 #include <linux/serial_sci.h>
 #include <linux/notifier.h>
+#include <linux/pm_runtime.h>
 #include <linux/cpufreq.h>
 #include <linux/clk.h>
 #include <linux/ctype.h>
@@ -560,6 +561,9 @@ static void sci_break_timer(unsigned long data)
 {
 	struct sci_port *port = (struct sci_port *)data;
 
+	if (port->enable)
+		port->enable(&port->port);
+
 	if (sci_rxd_in(&port->port) == 0) {
 		port->break_flag = 1;
 		sci_schedule_break_timer(port);
@@ -569,6 +573,9 @@ static void sci_break_timer(unsigned long data)
 		sci_schedule_break_timer(port);
 	} else
 		port->break_flag = 0;
+
+	if (port->disable)
+		port->disable(&port->port);
 }
 
 static int sci_handle_errors(struct uart_port *port)
@@ -837,6 +844,8 @@ static void sci_clk_enable(struct uart_port *port)
 {
 	struct sci_port *sci_port = to_sci_port(port);
 
+	pm_runtime_get_sync(port->dev);
+
 	clk_enable(sci_port->iclk);
 	sci_port->port.uartclk = clk_get_rate(sci_port->iclk);
 	clk_enable(sci_port->fclk);
@@ -848,6 +857,8 @@ static void sci_clk_disable(struct uart_port *port)
 
 	clk_disable(sci_port->fclk);
 	clk_disable(sci_port->iclk);
+
+	pm_runtime_put_sync(port->dev);
 }
 
 static int sci_request_irq(struct sci_port *port)
@@ -1756,6 +1767,8 @@ static int __devinit sci_init_single(struct platform_device *dev,
 		sci_port->enable = sci_clk_enable;
 		sci_port->disable = sci_clk_disable;
 		port->dev = &dev->dev;
+
+		pm_runtime_enable(&dev->dev);
 	}
 
 	sci_port->break_timer.data = (unsigned long)sci_port;
@@ -1775,7 +1788,7 @@ static int __devinit sci_init_single(struct platform_device *dev,
 	 *
 	 * For the muxed case there's nothing more to do.
 	 */
-	port->irq		= p->irqs[SCIx_TXI_IRQ];
+	port->irq		= p->irqs[SCIx_RXI_IRQ];
 
 	if (p->dma_dev)
 		dev_dbg(port->dev, "DMA device %p, tx %d, rx %d\n",
@@ -1936,6 +1949,7 @@ static int sci_remove(struct platform_device *dev)
 	clk_put(port->iclk);
 	clk_put(port->fclk);
 
+	pm_runtime_disable(&dev->dev);
 	return 0;
 }
 

drivers/tty/serial/sh-sci.h

@@ -270,12 +270,12 @@
 #elif defined(CONFIG_CPU_SUBTYPE_SH7705) || \
       defined(CONFIG_CPU_SUBTYPE_SH7720) || \
       defined(CONFIG_CPU_SUBTYPE_SH7721) || \
-      defined(CONFIG_ARCH_SH73A0) || \
-      defined(CONFIG_ARCH_SH7367) || \
-      defined(CONFIG_ARCH_SH7377)
+      defined(CONFIG_ARCH_SH7367)
 #define SCIF_FNS(name, scif_offset, scif_size) \
   CPU_SCIF_FNS(name, scif_offset, scif_size)
-#elif defined(CONFIG_ARCH_SH7372)
+#elif defined(CONFIG_ARCH_SH7377) || \
+      defined(CONFIG_ARCH_SH7372) || \
+      defined(CONFIG_ARCH_SH73A0)
 #define SCIx_FNS(name, sh4_scifa_offset, sh4_scifa_size, sh4_scifb_offset, sh4_scifb_size) \
   CPU_SCIx_FNS(name, sh4_scifa_offset, sh4_scifa_size, sh4_scifb_offset, sh4_scifb_size)
 #define SCIF_FNS(name, scif_offset, scif_size) \
@@ -313,9 +313,7 @@
 #if defined(CONFIG_CPU_SUBTYPE_SH7705) || \
     defined(CONFIG_CPU_SUBTYPE_SH7720) || \
     defined(CONFIG_CPU_SUBTYPE_SH7721) || \
-    defined(CONFIG_ARCH_SH73A0) || \
-    defined(CONFIG_ARCH_SH7367) || \
-    defined(CONFIG_ARCH_SH7377)
+    defined(CONFIG_ARCH_SH7367)
 
 SCIF_FNS(SCSMR,  0x00, 16)
 SCIF_FNS(SCBRR,  0x04,  8)
@@ -326,7 +324,9 @@ SCIF_FNS(SCFDR,  0x1c, 16)
 SCIF_FNS(SCxTDR, 0x20,  8)
 SCIF_FNS(SCxRDR, 0x24,  8)
 SCIF_FNS(SCLSR,  0x00,  0)
-#elif defined(CONFIG_ARCH_SH7372)
+#elif defined(CONFIG_ARCH_SH7377) || \
+      defined(CONFIG_ARCH_SH7372) || \
+      defined(CONFIG_ARCH_SH73A0)
 SCIF_FNS(SCSMR,  0x00, 16)
 SCIF_FNS(SCBRR,  0x04,  8)
 SCIF_FNS(SCSCR,  0x08, 16)