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authorDan Carpenter <dan.carpenter@oracle.com>2015-09-28 12:56:36 +0300
committerLee Jones <lee.jones@linaro.org>2015-10-30 17:19:47 +0000
commitf3a654c5198b1de3e6241ab6a9d5c52295504970 (patch)
tree5a939b645442150e64df5576fe889bac1697c6d1 /drivers/mfd/intel_soc_pmic_bxtwc.c
parentad698ea425f90e4d09694c2cf7155cad4d7badb3 (diff)
mfd: intel_soc_pmic_bxtwc: 64 bit bug in bxtwc_val_store()
The call to kstrtoul() will corrupt memory on 64 bit systems because an int is 4 bytes and a long is 8. Also it's not a good idea to let users trigger a dev_err() because it just ends up flooding /var/log/messages so I removed the printk. Fixes: 2ddd2086ea9c ('mfd: add Intel Broxton Whiskey Cove PMIC driver') Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers/mfd/intel_soc_pmic_bxtwc.c')
-rw-r--r--drivers/mfd/intel_soc_pmic_bxtwc.c7
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/mfd/intel_soc_pmic_bxtwc.c b/drivers/mfd/intel_soc_pmic_bxtwc.c
index 40acaff2e1c3..b9428767e615 100644
--- a/drivers/mfd/intel_soc_pmic_bxtwc.c
+++ b/drivers/mfd/intel_soc_pmic_bxtwc.c
@@ -297,10 +297,9 @@ static ssize_t bxtwc_val_store(struct device *dev,
unsigned int val;
struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
- if (kstrtoul(buf, 0, (unsigned long *)&val)) {
- dev_err(dev, "Invalid register value\n");
- return -EINVAL;
- }
+ ret = kstrtouint(buf, 0, &val);
+ if (ret)
+ return ret;
ret = regmap_write(pmic->regmap, bxtwc_reg_addr, val);
if (ret) {