[PATCH 4.9 046/144] wlcore: sdio: check for valid platform device data before suspend

From: Greg Kroah-Hartman
Date: Wed Aug 01 2018 - 13:26:49 EST

4.9-stable review patch. If anyone has any objections, please let me know.


From: Eyal Reizer <eyalreizer@xxxxxxxxx>

[ Upstream commit 6e91d48371e79862ea2c05867aaebe4afe55a865 ]

the wl pointer can be null In case only wlcore_sdio is probed while
no WiLink module is successfully probed, as in the case of mounting a
wl12xx module while using a device tree file configured with wl18xx
related settings.
In this case the system was crashing in wl1271_suspend() as platform
device data is not set.
Make sure wl the pointer is valid before using it.

Signed-off-by: Eyal Reizer <eyalr@xxxxxx>
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
drivers/net/wireless/ti/wlcore/sdio.c | 5 +++++
1 file changed, 5 insertions(+)

--- a/drivers/net/wireless/ti/wlcore/sdio.c
+++ b/drivers/net/wireless/ti/wlcore/sdio.c
@@ -404,6 +404,11 @@ static int wl1271_suspend(struct device
mmc_pm_flag_t sdio_flags;
int ret = 0;

+ if (!wl) {
+ dev_err(dev, "no wilink module was probed\n");
+ goto out;
+ }
dev_dbg(dev, "wl1271 suspend. wow_enabled: %d\n",