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authorGustavo A. R. Silva <garsilva@embeddedor.com>2017-11-20 17:12:29 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2017-11-22 07:00:44 +0300
commit727535903bea924c4f73abb202c4b3e85fff0ca4 (patch)
treef68d4b8d2400105cf78abad963b894bf7e59eff5 /drivers/scsi
parente4717292ddebcfe231651b5aff9fa19ca158d178 (diff)
downloadlinux-727535903bea924c4f73abb202c4b3e85fff0ca4.tar.xz
scsi: ufs: ufshcd: fix potential NULL pointer dereference in ufshcd_config_vreg
_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@embeddedor.com> Reviewed-by: Subhash Jadavani <subhashj@codeaurora.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/ufs/ufshcd.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 011c3369082c..a355d989b414 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -6559,12 +6559,15 @@ 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);