mwifiex: fix compile warning of unused variable

We got a compile warning shows below:

drivers/net/wireless/marvell/mwifiex/sdio.c: In function
'mwifiex_sdio_remove':
drivers/net/wireless/marvell/mwifiex/sdio.c:377:6: warning: variable
'ret' set but not used [-Wunused-but-set-variable]

Per the code, it didn't check if mwifiex_sdio_read_fw_status
finish successfully. We should at least check the return of
mwifiex_sdio_read_fw_status, otherwise the following check of
firmware_stat and adapter->mfg_mode is pointless as the device
is probably dead.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

diff --git a/drivers/net/wireless/marvell/mwifiex/sdio.c b/drivers/net/wireless/marvell/mwifiex/sdio.c
index f81a006..fd5183c 100644 (file)
--- a/drivers/net/wireless/marvell/mwifiex/sdio.c
+++ b/drivers/net/wireless/marvell/mwifiex/sdio.c
@@ -390,7 +390,8 @@ mwifiex_sdio_remove(struct sdio_func *func)
        mwifiex_dbg(adapter, INFO, "info: SDIO func num=%d\n", func->num);
 
        ret = mwifiex_sdio_read_fw_status(adapter, &firmware_stat);
-       if (firmware_stat == FIRMWARE_READY_SDIO && !adapter->mfg_mode) {
+       if (!ret && firmware_stat == FIRMWARE_READY_SDIO &&
+           !adapter->mfg_mode) {
                mwifiex_deauthenticate_all(adapter);
 
                priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);