From: "Gustavo A. R. Silva" <garsilva@xxxxxxxxxxxxxx> [ Upstream commit 727535903bea924c4f73abb202c4b3e85fff0ca4 ] _vreg_ is being dereferenced before it is null checked, hence there is a potential null pointer dereference. Fix this by moving the pointer dereference after _vreg_ has been null checked. This issue was detected with the help of Coccinelle. Fixes: aa4976130934 ("ufs: Add regulator enable support") Signed-off-by: Gustavo A. R. Silva <garsilva@xxxxxxxxxxxxxx> Reviewed-by: Subhash Jadavani <subhashj@xxxxxxxxxxxxxx> Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx> Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx> --- drivers/scsi/ufs/ufshcd.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 0c2482ec7d21..096c867069e9 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -4392,12 +4392,15 @@ static int ufshcd_config_vreg(struct device *dev, struct ufs_vreg *vreg, bool on) { int ret = 0; - struct regulator *reg = vreg->reg; - const char *name = vreg->name; + struct regulator *reg; + const char *name; int min_uV, uA_load; BUG_ON(!vreg); + reg = vreg->reg; + name = vreg->name; + if (regulator_count_voltages(reg) > 0) { min_uV = on ? vreg->min_uV : 0; ret = regulator_set_voltage(reg, min_uV, vreg->max_uV); -- 2.11.0