From: Brian Norris Date: Mon, 1 May 2017 19:36:59 +0000 (-0700) Subject: mwifiex: initiate card-specific work atomically X-Git-Tag: v4.13-rc1~157^2~214^2~118 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=21f569af9ab3608382482166ae9aba802b097e3f;p=karo-tx-linux.git mwifiex: initiate card-specific work atomically The non-atomic test + set is a little awkward here, and it technically means we might double-schedule work unnecessarily. AFAICT, this is not really a problem, since the extra "work" will be a no-op (the flag(s) will be cleared by then), but it's still an anti-pattern. Rewrite this to use the atomic test_and_set_bit() helper instead. Signed-off-by: Brian Norris Reviewed-by: Dmitry Torokhov Signed-off-by: Kalle Valo --- diff --git a/drivers/net/wireless/marvell/mwifiex/pcie.c b/drivers/net/wireless/marvell/mwifiex/pcie.c index ac62bce50e96..5f56e8e6d612 100644 --- a/drivers/net/wireless/marvell/mwifiex/pcie.c +++ b/drivers/net/wireless/marvell/mwifiex/pcie.c @@ -2837,12 +2837,9 @@ static void mwifiex_pcie_device_dump(struct mwifiex_adapter *adapter) { struct pcie_service_card *card = adapter->card; - if (test_bit(MWIFIEX_IFACE_WORK_DEVICE_DUMP, &card->work_flags)) - return; - - set_bit(MWIFIEX_IFACE_WORK_DEVICE_DUMP, &card->work_flags); - - schedule_work(&card->work); + if (!test_and_set_bit(MWIFIEX_IFACE_WORK_DEVICE_DUMP, + &card->work_flags)) + schedule_work(&card->work); } static void mwifiex_pcie_free_buffers(struct mwifiex_adapter *adapter) diff --git a/drivers/net/wireless/marvell/mwifiex/sdio.c b/drivers/net/wireless/marvell/mwifiex/sdio.c index 0af1c6733c92..d38d31bb9b79 100644 --- a/drivers/net/wireless/marvell/mwifiex/sdio.c +++ b/drivers/net/wireless/marvell/mwifiex/sdio.c @@ -2533,12 +2533,8 @@ static void mwifiex_sdio_card_reset(struct mwifiex_adapter *adapter) { struct sdio_mmc_card *card = adapter->card; - if (test_bit(MWIFIEX_IFACE_WORK_CARD_RESET, &card->work_flags)) - return; - - set_bit(MWIFIEX_IFACE_WORK_CARD_RESET, &card->work_flags); - - schedule_work(&card->work); + if (!test_and_set_bit(MWIFIEX_IFACE_WORK_CARD_RESET, &card->work_flags)) + schedule_work(&card->work); } /* This function dumps FW information */ @@ -2546,11 +2542,9 @@ static void mwifiex_sdio_device_dump(struct mwifiex_adapter *adapter) { struct sdio_mmc_card *card = adapter->card; - if (test_bit(MWIFIEX_IFACE_WORK_DEVICE_DUMP, &card->work_flags)) - return; - - set_bit(MWIFIEX_IFACE_WORK_DEVICE_DUMP, &card->work_flags); - schedule_work(&card->work); + if (!test_and_set_bit(MWIFIEX_IFACE_WORK_DEVICE_DUMP, + &card->work_flags)) + schedule_work(&card->work); } /* Function to dump SDIO function registers and SDIO scratch registers in case