diff options
| author | Gustavo A. R. Silva <garsilva@embeddedor.com> | 2017-11-20 17:12:29 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-02-03 19:39:15 +0300 |
| commit | 6c27a40c9e182ed318e886c4edc35fbbc182d384 (patch) | |
| tree | e7ee9975e2ec6f64d56e0fc9642040643b331339 /drivers/scsi/ufs/ufshcd.c | |
| parent | 39527e909ea52bfec616536a1b02011f58a08c30 (diff) | |
| download | linux-6c27a40c9e182ed318e886c4edc35fbbc182d384.tar.xz | |
scsi: ufs: ufshcd: fix potential NULL pointer dereference in ufshcd_config_vreg
[ 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@embeddedor.com>
Reviewed-by: Subhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/scsi/ufs/ufshcd.c')
| -rw-r--r-- | drivers/scsi/ufs/ufshcd.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 794a4600e952..d344fef01f1d 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -6555,12 +6555,15 @@ 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); |