[PATCH] rsi: Use resume_noirq for SDIO

The rsi_resume() does access the bus to enable interrupts on the RSI
SDIO WiFi card, however when calling sdio_claim_host() in the resume
path, it is possible the bus is already claimed and sdio_claim_host()
spins indefinitelly. Enable the SDIO card interrupts in resume_noirq
instead to prevent anything else from claiming the SDIO bus first.

Fixes: 20db07332736 ("rsi: sdio suspend and resume support")
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Amitkumar Karwar <redacted>
Cc: Angus Ainslie <redacted>
Cc: David S. Miller <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Kalle Valo <redacted>
Cc: Karun Eagalapati <redacted>
Cc: Martin Kepplinger <martink@posteo.de>
Cc: Sebastian Krzyszkowiak <sebastian.krzyszkowiak@puri.sm>
Cc: Siva Rebbagondla <redacted>
Cc: netdev@vger.kernel.org
Cc: stable@vger.kernel.org
---
 drivers/net/wireless/rsi/rsi_91x_sdio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/rsi/rsi_91x_sdio.c b/drivers/net/wireless/rsi/rsi_91x_sdio.c
index 122174fca672..8465a4ee9b61 100644
--- a/drivers/net/wireless/rsi/rsi_91x_sdio.c
+++ b/drivers/net/wireless/rsi/rsi_91x_sdio.c

@@ -1513,7 +1513,7 @@ static int rsi_restore(struct device *dev)
 }
 static const struct dev_pm_ops rsi_pm_ops = {
 	.suspend = rsi_suspend,
-	.resume = rsi_resume,
+	.resume_noirq = rsi_resume,
 	.freeze = rsi_freeze,
 	.thaw = rsi_thaw,
 	.restore = rsi_restore,

-- 
2.30.2

Marek Vasut [off-list ref] wrote:

The rsi_resume() does access the bus to enable interrupts on the RSI
SDIO WiFi card, however when calling sdio_claim_host() in the resume
path, it is possible the bus is already claimed and sdio_claim_host()
spins indefinitelly. Enable the SDIO card interrupts in resume_noirq
instead to prevent anything else from claiming the SDIO bus first.

Fixes: 20db07332736 ("rsi: sdio suspend and resume support")
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Amitkumar Karwar <redacted>
Cc: Angus Ainslie <redacted>
Cc: David S. Miller <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Kalle Valo <redacted>
Cc: Karun Eagalapati <redacted>
Cc: Martin Kepplinger <martink@posteo.de>
Cc: Sebastian Krzyszkowiak <sebastian.krzyszkowiak@puri.sm>
Cc: Siva Rebbagondla <redacted>
Cc: netdev@vger.kernel.org
Cc: stable@vger.kernel.org

Patch applied to wireless-drivers-next.git, thanks.

c434e5e48dc4 rsi: Use resume_noirq for SDIO

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/20210327235932.175896-1-marex@denx.de/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches