spi: sf_ops: Check the return value from spi_flash_cmd_read_status()
We should check the return value from spi_flash_cmd_read_status() and
propagate it in the case of error.
This fixes a defect caught by Coverity.
Reported-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Reviewed-by: Jagan Teki <jteki@openedev.com>
diff --git a/drivers/mtd/spi/sf_ops.c b/drivers/mtd/spi/sf_ops.c
index 4065520..3a56d7f 100644
--- a/drivers/mtd/spi/sf_ops.c
+++ b/drivers/mtd/spi/sf_ops.c
@@ -663,8 +663,11 @@
u8 status_old, status_new;
u8 mask = SR_BP2 | SR_BP1 | SR_BP0;
u8 shift = ffs(mask) - 1, pow, val;
+ int ret;
- spi_flash_cmd_read_status(flash, &status_old);
+ ret = spi_flash_cmd_read_status(flash, &status_old);
+ if (ret < 0)
+ return ret;
/* SPI NOR always locks to the end */
if (ofs + len != flash->size) {
@@ -714,8 +717,11 @@
uint8_t status_old, status_new;
u8 mask = SR_BP2 | SR_BP1 | SR_BP0;
u8 shift = ffs(mask) - 1, pow, val;
+ int ret;
- spi_flash_cmd_read_status(flash, &status_old);
+ ret = spi_flash_cmd_read_status(flash, &status_old);
+ if (ret < 0)
+ return ret;
/* Cannot unlock; would unlock larger region than requested */
if (stm_is_locked_sr(flash, status_old, ofs - flash->erase_size,