[PATCH] vfree and kfree cleanup in drivers/

This patch does a full cleanup of 'NULL checks before vfree', and a partial
cleanup of calls to kfree for all of drivers/ - the kfree bit is partial in
that I only did the files that also had vfree calls in them.  The patch
also gets rid of some redundant (void *) casts of pointers being passed to
[vk]free, and a some tiny whitespace corrections also crept in.

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/block/z2ram.c

@@ -296,7 +296,7 @@ z2_open( struct inode *inode, struct file *filp )
     return 0;
 
 err_out_kfree:
-    kfree( z2ram_map );
+    kfree(z2ram_map);
 err_out:
     return rc;
 }

drivers/cdrom/sbpcd.c

@@ -4216,7 +4216,8 @@ static int sbpcd_dev_ioctl(struct cdrom_device_info *cdi, u_int cmd,
 		
 	case CDROMAUDIOBUFSIZ: /* configure the audio buffer size */
 		msg(DBG_IOC,"ioctl: CDROMAUDIOBUFSIZ entered.\n");
-		if (current_drive->sbp_audsiz>0) vfree(current_drive->aud_buf);
+		if (current_drive->sbp_audsiz>0)
+			vfree(current_drive->aud_buf);
 		current_drive->aud_buf=NULL;
 		current_drive->sbp_audsiz=arg;
 		
@@ -5910,7 +5911,8 @@ static void sbpcd_exit(void)
 		put_disk(D_S[j].disk);
 		devfs_remove("sbp/c0t%d", j);
 		vfree(D_S[j].sbp_buf);
-		if (D_S[j].sbp_audsiz>0) vfree(D_S[j].aud_buf);
+		if (D_S[j].sbp_audsiz>0)
+			vfree(D_S[j].aud_buf);
 		if ((unregister_cdrom(D_S[j].sbpcd_infop) == -EINVAL))
 		{
 			msg(DBG_INF, "What's that: can't unregister info %s.\n", major_name);

drivers/char/agp/backend.c

@@ -206,10 +206,9 @@ static void agp_backend_cleanup(struct agp_bridge_data *bridge)
 		bridge->driver->cleanup();
 	if (bridge->driver->free_gatt_table)
 		bridge->driver->free_gatt_table(bridge);
-	if (bridge->key_list) {
-		vfree(bridge->key_list);
-		bridge->key_list = NULL;
-	}
+
+	vfree(bridge->key_list);
+	bridge->key_list = NULL;
 
 	if (bridge->driver->agp_destroy_page &&
 	    bridge->driver->needs_scratch_page)

drivers/isdn/i4l/isdn_bsdcomp.c

@@ -283,23 +283,19 @@ static void bsd_free (void *state)
 		/*
 		 * Release the dictionary
 		 */
-		if (db->dict) {
-			vfree (db->dict);
-			db->dict = NULL;
-		}
+		vfree(db->dict);
+		db->dict = NULL;
 
 		/*
 		 * Release the string buffer
 		 */
-		if (db->lens) {
-			vfree (db->lens);
-			db->lens = NULL;
-		}
+		vfree(db->lens);
+		db->lens = NULL;
 
 		/*
 		 * Finally release the structure itself.
 		 */
-		kfree (db);
+		kfree(db);
 	}
 }
 

drivers/isdn/i4l/isdn_common.c

@@ -1953,7 +1953,8 @@ isdn_add_channels(isdn_driver_t *d, int drvidx, int n, int adding)
 		kfree(d->rcvcount);
 	if (!(d->rcvcount = kmalloc(sizeof(int) * m, GFP_ATOMIC))) {
 		printk(KERN_WARNING "register_isdn: Could not alloc rcvcount\n");
-		if (!adding) kfree(d->rcverr);
+		if (!adding)
+			kfree(d->rcverr);
 		return -1;
 	}
 	memset((char *) d->rcvcount, 0, sizeof(int) * m);

drivers/md/dm-exception-store.c

@@ -568,12 +568,9 @@ int dm_create_persistent(struct exception_store *store, uint32_t chunk_size)
 
       bad:
 	dm_io_put(sectors_to_pages(chunk_size));
-	if (ps) {
-		if (ps->area)
-			free_area(ps);
-
-		kfree(ps);
-	}
+	if (ps && ps->area)
+		free_area(ps);
+	kfree(ps);
 	return r;
 }
 

drivers/media/common/saa7146_core.c

@@ -168,10 +168,8 @@ void saa7146_pgtable_free(struct pci_dev *pci, struct saa7146_pgtable *pt)
 		return;
 	pci_free_consistent(pci, pt->size, pt->cpu, pt->dma);
 	pt->cpu = NULL;
-	if (NULL != pt->slist) {
-		kfree(pt->slist);
-		pt->slist = NULL;
-	}
+	kfree(pt->slist);
+	pt->slist = NULL;
 }
 
 int saa7146_pgtable_alloc(struct pci_dev *pci, struct saa7146_pgtable *pt)

drivers/media/video/cpia_usb.c

@@ -445,10 +445,8 @@ static void cpia_usb_free_resources(struct usb_cpia *ucpia, int try)
 		ucpia->sbuf[1].urb = NULL;
 	}
 
-	if (ucpia->sbuf[1].data) {
-		kfree(ucpia->sbuf[1].data);
-		ucpia->sbuf[1].data = NULL;
-	}
+	kfree(ucpia->sbuf[1].data);
+	ucpia->sbuf[1].data = NULL;
  
 	if (ucpia->sbuf[0].urb) {
 		usb_kill_urb(ucpia->sbuf[0].urb);
@@ -456,10 +454,8 @@ static void cpia_usb_free_resources(struct usb_cpia *ucpia, int try)
 		ucpia->sbuf[0].urb = NULL;
 	}
 
-	if (ucpia->sbuf[0].data) {
-		kfree(ucpia->sbuf[0].data);
-		ucpia->sbuf[0].data = NULL;
-	}
+	kfree(ucpia->sbuf[0].data);
+	ucpia->sbuf[0].data = NULL;
 }
 
 static int cpia_usb_close(void *privdata)
@@ -623,20 +619,14 @@ static void cpia_disconnect(struct usb_interface *intf)
 
 	ucpia->curbuff = ucpia->workbuff = NULL;
 
-	if (ucpia->buffers[2]) {
-		vfree(ucpia->buffers[2]);
-		ucpia->buffers[2] = NULL;
-	}
+	vfree(ucpia->buffers[2]);
+	ucpia->buffers[2] = NULL;
 
-	if (ucpia->buffers[1]) {
-		vfree(ucpia->buffers[1]);
-		ucpia->buffers[1] = NULL;
-	}
+	vfree(ucpia->buffers[1]);
+	ucpia->buffers[1] = NULL;
 
-	if (ucpia->buffers[0]) {
-		vfree(ucpia->buffers[0]);
-		ucpia->buffers[0] = NULL;
-	}
+	vfree(ucpia->buffers[0]);
+	ucpia->buffers[0] = NULL;
 
 	cam->lowlevel_data = NULL;
 	kfree(ucpia);

drivers/media/video/stradis.c

@@ -2184,30 +2184,18 @@ static void release_saa(void)
 		vfree(saa->vidbuf);
 		vfree(saa->audbuf);
 		vfree(saa->osdbuf);
-		if (saa->dmavid2)
-			kfree((void *) saa->dmavid2);
+		kfree(saa->dmavid2);
 		saa->audbuf = saa->vidbuf = saa->osdbuf = NULL;
 		saa->dmavid2 = NULL;
-		if (saa->dmadebi)
-			kfree((void *) saa->dmadebi);
-		if (saa->dmavid1)
-			kfree((void *) saa->dmavid1);
-		if (saa->dmavid2)
-			kfree((void *) saa->dmavid2);
-		if (saa->dmavid3)
-			kfree((void *) saa->dmavid3);
-		if (saa->dmaa1in)
-			kfree((void *) saa->dmaa1in);
-		if (saa->dmaa1out)
-			kfree((void *) saa->dmaa1out);
-		if (saa->dmaa2in)
-			kfree((void *) saa->dmaa2in);
-		if (saa->dmaa2out)
-			kfree((void *) saa->dmaa2out);
-		if (saa->dmaRPS1)
-			kfree((void *) saa->dmaRPS1);
-		if (saa->dmaRPS2)
-			kfree((void *) saa->dmaRPS2);
+		kfree(saa->dmadebi);
+		kfree(saa->dmavid1);
+		kfree(saa->dmavid3);
+		kfree(saa->dmaa1in);
+		kfree(saa->dmaa1out);
+		kfree(saa->dmaa2in);
+		kfree(saa->dmaa2out);
+		kfree(saa->dmaRPS1);
+		kfree(saa->dmaRPS2);
 		free_irq(saa->irq, saa);
 		if (saa->saa7146_mem)
 			iounmap(saa->saa7146_mem);

drivers/media/video/video-buf.c

@@ -267,10 +267,10 @@ int videobuf_dma_free(struct videobuf_dmabuf *dma)
 		kfree(dma->pages);
 		dma->pages = NULL;
 	}
-	if (dma->vmalloc) {
-		vfree(dma->vmalloc);
-		dma->vmalloc = NULL;
-	}
+
+	vfree(dma->vmalloc);
+	dma->vmalloc = NULL;
+
 	if (dma->bus_addr) {
 		dma->bus_addr = 0;
 	}

drivers/media/video/zoran_driver.c

@@ -650,7 +650,7 @@ jpg_fbuffer_free (struct file *file)
 				     off += PAGE_SIZE)
 					ClearPageReserved(MAP_NR
 							  (mem + off));
-				kfree((void *) mem);
+				kfree(mem);
 				fh->jpg_buffers.buffer[i].frag_tab[0] = 0;
 				fh->jpg_buffers.buffer[i].frag_tab[1] = 0;
 			}

drivers/media/video/zr36120.c

@@ -820,11 +820,9 @@ void zoran_close(struct video_device* dev)
         msleep(100);			/* Wait 1/10th of a second */
 
 	/* free the allocated framebuffer */
-	if (ztv->fbuffer)
-		bfree( ztv->fbuffer, ZORAN_MAX_FBUFSIZE );
+	bfree(ztv->fbuffer, ZORAN_MAX_FBUFSIZE);
 	ztv->fbuffer = 0;
-	if (ztv->overinfo.overlay)
-		kfree( ztv->overinfo.overlay );
+	kfree(ztv->overinfo.overlay);
 	ztv->overinfo.overlay = 0;
 
 }

drivers/mtd/devices/mtdram.c

@@ -91,8 +91,7 @@ static void __exit cleanup_mtdram(void)
 {
 	if (mtd_info) {
 		del_mtd_device(mtd_info);
-		if (mtd_info->priv)
-			vfree(mtd_info->priv);
+		vfree(mtd_info->priv);
 		kfree(mtd_info);
 	}
 }

drivers/mtd/ftl.c

@@ -1017,27 +1017,16 @@ static int ftl_writesect(struct mtd_blktrans_dev *dev,
 
 void ftl_freepart(partition_t *part)
 {
-    if (part->VirtualBlockMap) {
 	vfree(part->VirtualBlockMap);
 	part->VirtualBlockMap = NULL;
-    }
-    if (part->VirtualPageMap) {
 	kfree(part->VirtualPageMap);
 	part->VirtualPageMap = NULL;
-    }
-    if (part->EUNInfo) {
 	kfree(part->EUNInfo);
 	part->EUNInfo = NULL;
-    }
-    if (part->XferInfo) {
 	kfree(part->XferInfo);
 	part->XferInfo = NULL;
-    }
-    if (part->bam_cache) {
 	kfree(part->bam_cache);
 	part->bam_cache = NULL;
-    }
-    
 } /* ftl_freepart */
 
 static void ftl_add_mtd(struct mtd_blktrans_ops *tr, struct mtd_info *mtd)

drivers/net/bsd_comp.c

@@ -323,33 +323,27 @@ static void bsd_reset (void *state)
  */
 
 static void bsd_free (void *state)
-  {
-    struct bsd_db *db = (struct bsd_db *) state;
+{
+	struct bsd_db *db = state;
     
-    if (db)
-      {
+	if (!db)
+		return;
+
 /*
  * Release the dictionary
  */
-	if (db->dict)
-	  {
-	    vfree (db->dict);
-	    db->dict = NULL;
-	  }
+	vfree(db->dict);
+	db->dict = NULL;
 /*
  * Release the string buffer
  */
-	if (db->lens)
-	  {
-	    vfree (db->lens);
-	    db->lens = NULL;
-	  }
+	vfree(db->lens);
+	db->lens = NULL;
 /*
  * Finally release the structure itself.
  */
-	kfree (db);
-      }
-  }
+	kfree(db);
+}
 
 /*
  * Allocate space for a (de) compressor.

drivers/scsi/53c7xx.c

@@ -6090,8 +6090,8 @@ NCR53c7x0_release(struct Scsi_Host *host) {
     if (hostdata->num_cmds)
 	printk ("scsi%d : leaked %d NCR53c7x0_cmd structures\n",
 	    host->host_no, hostdata->num_cmds);
-    if (hostdata->events) 
-	vfree ((void *)hostdata->events);
+
+    vfree(hostdata->events);
 
     /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING, which
      * XXX may be invalid (CONFIG_060_WRITETHROUGH)

drivers/scsi/cpqfcTSinit.c

@@ -691,8 +691,7 @@ int cpqfcTS_ioctl( struct scsi_device *ScsiDev, int Cmnd, void *arg)
         if(  copy_to_user( vendor_cmd->bufp, buf, vendor_cmd->len))
 		result = -EFAULT;
 
-        if( buf) 
-	  kfree( buf);
+	kfree(buf);
 
         return result;
       }

drivers/scsi/osst.c

@@ -1377,7 +1377,7 @@ static int osst_read_back_buffer_and_rewrite(struct osst_tape * STp, struct scsi
 	
 		if ((STp->buffer)->syscall_result || !SRpnt) {
 			printk(KERN_ERR "%s:E: Failed to read frame back from OnStream buffer\n", name);
-			vfree((void *)buffer);
+			vfree(buffer);
 			*aSRpnt = SRpnt;
 			return (-EIO);
 		}
@@ -1419,7 +1419,7 @@ static int osst_read_back_buffer_and_rewrite(struct osst_tape * STp, struct scsi
 
 			if (new_frame > frame + 1000) {
 				printk(KERN_ERR "%s:E: Failed to find writable tape media\n", name);
-				vfree((void *)buffer);
+				vfree(buffer);
 				return (-EIO);
 			}
 			if ( i >= nframes + pending ) break;
@@ -1500,7 +1500,7 @@ static int osst_read_back_buffer_and_rewrite(struct osst_tape * STp, struct scsi
 			     SRpnt->sr_sense_buffer[12]         ==  0 &&
 			     SRpnt->sr_sense_buffer[13]         ==  2) {
 				printk(KERN_ERR "%s:E: Volume overflow in write error recovery\n", name);
-				vfree((void *)buffer);
+				vfree(buffer);
 				return (-EIO);			/* hit end of tape = fail */
 			}
 			i = ((SRpnt->sr_sense_buffer[3] << 24) |
@@ -1525,7 +1525,7 @@ static int osst_read_back_buffer_and_rewrite(struct osst_tape * STp, struct scsi
 	}
 	if (!pending)
 		osst_copy_to_buffer(STp->buffer, p);	/* so buffer content == at entry in all cases */
-	vfree((void *)buffer);
+	vfree(buffer);
 	return 0;
 }
 
@@ -5852,7 +5852,7 @@ static int osst_remove(struct device *dev)
 			os_scsi_tapes[i] = NULL;
 			osst_nr_dev--;
 			write_unlock(&os_scsi_tapes_lock);
-			if (tpnt->header_cache != NULL) vfree(tpnt->header_cache);
+			vfree(tpnt->header_cache);
 			if (tpnt->buffer) {
 				normalize_buffer(tpnt->buffer);
 				kfree(tpnt->buffer);
@@ -5896,8 +5896,7 @@ static void __exit exit_osst (void)
 		for (i=0; i < osst_max_dev; ++i) {
 			if (!(STp = os_scsi_tapes[i])) continue;
 			/* This is defensive, supposed to happen during detach */
-			if (STp->header_cache)
-				vfree(STp->header_cache);
+			vfree(STp->header_cache);
 			if (STp->buffer) {
 				normalize_buffer(STp->buffer);
 				kfree(STp->buffer);

drivers/usb/media/stv680.c

@@ -260,7 +260,7 @@ static int stv_stop_video (struct usb_stv *dev)
 			PDEBUG (0, "STV(i): Camera set to original resolution");
 	}
 	/* origMode */
-	kfree (buf);
+	kfree(buf);
 	return i;
 }
 
@@ -276,7 +276,7 @@ static int stv_set_video_mode (struct usb_stv *dev)
 	}
 
 	if ((i = stv_set_config (dev, 1, 0, 0)) < 0) {
-		kfree (buf);
+		kfree(buf);
 		return i;
 	}
 
@@ -301,13 +301,13 @@ static int stv_set_video_mode (struct usb_stv *dev)
 	goto exit;
 
 error:
-	kfree (buf);
+	kfree(buf);
 	if (stop_video == 1)
 		stv_stop_video (dev);
 	return -1;
 
 exit:
-	kfree (buf);
+	kfree(buf);
 	return 0;
 }
 
@@ -327,7 +327,7 @@ static int stv_init (struct usb_stv *stv680)
 
 	/* set config 1, interface 0, alternate 0 */
 	if ((i = stv_set_config (stv680, 1, 0, 0)) < 0) {
-		kfree (buffer);
+		kfree(buffer);
 		PDEBUG (0, "STV(e): set config 1,0,0 failed");
 		return -1;
 	}
@@ -435,11 +435,11 @@ static int stv_init (struct usb_stv *stv680)
 error:
 	i = stv_sndctrl (0, stv680, 0x80, 0, buffer, 0x02);	/* Get Last Error */
 	PDEBUG (1, "STV(i): last error: %i,  command = 0x%x", buffer[0], buffer[1]);
-	kfree (buffer);
+	kfree(buffer);
 	return -1;
 
 exit:
-	kfree (buffer);
+	kfree(buffer);
 
 	/* video = 320x240, 352x288 */
 	if (stv680->CIF == 1) {
@@ -708,10 +708,10 @@ static int stv680_stop_stream (struct usb_stv *stv680)
 			usb_kill_urb (stv680->urb[i]);
 			usb_free_urb (stv680->urb[i]);
 			stv680->urb[i] = NULL;
-			kfree (stv680->sbuf[i].data);
+			kfree(stv680->sbuf[i].data);
 		}
 	for (i = 0; i < STV680_NUMSCRATCH; i++) {
-		kfree (stv680->scratch[i].data);
+		kfree(stv680->scratch[i].data);
 		stv680->scratch[i].data = NULL;
 	}
 
@@ -1068,7 +1068,7 @@ static int stv_close (struct inode *inode, struct file *file)
 	stv680->user = 0;
 
 	if (stv680->removed) {
-		kfree (stv680);
+		kfree(stv680);
 		stv680 = NULL;
 		PDEBUG (0, "STV(i): device unregistered");
 	}
@@ -1445,14 +1445,14 @@ static inline void usb_stv680_remove_disconnected (struct usb_stv *stv680)
 			usb_kill_urb (stv680->urb[i]);
 			usb_free_urb (stv680->urb[i]);
 			stv680->urb[i] = NULL;
-			kfree (stv680->sbuf[i].data);
+			kfree(stv680->sbuf[i].data);
 		}
 	for (i = 0; i < STV680_NUMSCRATCH; i++)
-		kfree (stv680->scratch[i].data);
+		kfree(stv680->scratch[i].data);
 	PDEBUG (0, "STV(i): %s disconnected", stv680->camera_name);
 
 	/* Free the memory */
-	kfree (stv680);
+	kfree(stv680);
 }
 
 static void stv680_disconnect (struct usb_interface *intf)

drivers/video/vgastate.c

@@ -342,16 +342,11 @@ static void vga_cleanup(struct vgastate *state)
 	if (state->vidstate != NULL) {
 		struct regstate *saved = (struct regstate *) state->vidstate;
 
-		if (saved->vga_font0) 
-			vfree(saved->vga_font0);
-		if (saved->vga_font1) 
-			vfree(saved->vga_font1);
-		if (saved->vga_text)
-			vfree(saved->vga_text);
-		if (saved->vga_cmap)
-			vfree(saved->vga_cmap);
-		if (saved->attr)
-			vfree(saved->attr);
+		vfree(saved->vga_font0);
+		vfree(saved->vga_font1);
+		vfree(saved->vga_text);
+		vfree(saved->vga_cmap);
+		vfree(saved->attr);
 		kfree(saved);
 		state->vidstate = NULL;
 	}