diff mbox series

[5.12,200/384] mmc: sdhci-esdhc-imx: validate pinctrl before use it

Message ID 20210510102021.469496439@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg KH May 10, 2021, 10:19 a.m. UTC 
From: Peng Fan <peng.fan@nxp.com>


[ Upstream commit f410ee0aa2df050a9505f5c261953e9b18e21206 ]

When imx_data->pinctrl is not a valid pointer, pinctrl_lookup_state
will trigger kernel panic.

When we boot Dual OS on Jailhouse hypervisor, we let the 1st Linux to
configure pinmux ready for the 2nd OS, so the 2nd OS not have pinctrl
settings.

Similar to this commit b62eee9f804e ("mmc: sdhci-esdhc-imx: no fail when no pinctrl available").

Reviewed-by: Bough Chen <haobo.chen@nxp.com>

Reviewed-by: Alice Guo <alice.guo@nxp.com>

Signed-off-by: Peng Fan <peng.fan@nxp.com>

Link: https://lore.kernel.org/r/1614222604-27066-6-git-send-email-peng.fan@oss.nxp.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Signed-off-by: Sasha Levin <sashal@kernel.org>

---
 drivers/mmc/host/sdhci-esdhc-imx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

-- 
2.30.2
diff mbox series

Patch

diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index a20459744d21..94327988da91 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -1488,7 +1488,7 @@  sdhci_esdhc_imx_probe_dt(struct platform_device *pdev,
 
 	mmc_of_parse_voltage(np, &host->ocr_mask);
 
-	if (esdhc_is_usdhc(imx_data)) {
+	if (esdhc_is_usdhc(imx_data) && !IS_ERR(imx_data->pinctrl)) {
 		imx_data->pins_100mhz = pinctrl_lookup_state(imx_data->pinctrl,
 						ESDHC_PINCTRL_STATE_100MHZ);
 		imx_data->pins_200mhz = pinctrl_lookup_state(imx_data->pinctrl,