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: NShawn Lin <shawn.lin@rock-chips.com> Reviewed-by: NBrian Norris <briannorris@chromium.org> Signed-off-by: NKalle Valo <kvalo@codeaurora.org>
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