cmd_sf: Add print mesg for 'sf erase' command

This patch adds a print messages while using 'sf erase' command
to make sure that how many bytes erased in flash device.

Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
Acked-by: Tom Rini <trini@ti.com>

common/cmd_sf.c

@@ -305,12 +305,10 @@ static int do_spi_flash_erase(int argc, char * const argv[])
 	}
 
 	ret = spi_flash_erase(flash, offset, len);
-	if (ret) {
-		printf("SPI flash %s failed\n", argv[0]);
-		return 1;
-	}
+	printf("SF: %zu bytes @ %#x Erased: %s\n", (size_t)len, (u32)offset,
+			ret ? "ERROR" : "OK");
 
-	return 0;
+	return ret == 0 ? 0 : 1;
 }
 
 #ifdef CONFIG_CMD_SF_TEST

drivers/mtd/spi/spi_flash.c

@@ -207,7 +207,7 @@ int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout)
 
 int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len)
 {
-	u32 start, end, erase_size;
+	u32 end, erase_size;
 	int ret;
 	u8 cmd[4];
 
@@ -227,8 +227,7 @@ int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len)
 		cmd[0] = CMD_ERASE_4K;
 	else
 		cmd[0] = CMD_ERASE_64K;
-	start = offset;
-	end = start + len;
+	end = offset + len;
 
 	while (offset < end) {
 		spi_flash_addr(offset, cmd);
@@ -250,8 +249,6 @@ int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len)
 			goto out;
 	}
 
-	debug("SF: Successfully erased %zu bytes @ %#x\n", len, start);
-
  out:
 	spi_release_bus(flash->spi);
 	return ret;