mtd: m25p80: make command buffer DMA-safe
spi_write() requires the buffer to be DMA-safe, kmalloc()
it seperately to ensure this.
Signed-off-by: Johannes Stezenbach <js@sig21.net>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index 933267a..291d5d9 100644
--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -78,7 +78,7 @@
struct mtd_info mtd;
unsigned partitioned:1;
u8 erase_opcode;
- u8 command[CMD_SIZE + FAST_READ_DUMMY_BYTE];
+ u8 *command;
};
static inline struct m25p *mtd_to_m25p(struct mtd_info *mtd)
@@ -769,6 +769,11 @@
flash = kzalloc(sizeof *flash, GFP_KERNEL);
if (!flash)
return -ENOMEM;
+ flash->command = kmalloc(CMD_SIZE + FAST_READ_DUMMY_BYTE, GFP_KERNEL);
+ if (!flash->command) {
+ kfree(flash);
+ return -ENOMEM;
+ }
flash->spi = spi;
mutex_init(&flash->lock);
@@ -888,8 +893,10 @@
status = del_mtd_partitions(&flash->mtd);
else
status = del_mtd_device(&flash->mtd);
- if (status == 0)
+ if (status == 0) {
+ kfree(flash->command);
kfree(flash);
+ }
return 0;
}