The struct menelaus_vtg pointer vtg cannot be NULL here
so the condition is never true and if it ever was true
it would lead to a NULL pointer dereference when we goto
label set_voltage.
Before the below patch was applied the code was:
if (vtg == 0)
The intention was to check if vtg_val is 0.
commit 59a9f7a32adf6537b4e4db8ca204eeb77d7a634e
("mfd: menelaus: Use NULL instead of 0")
Signed-off-by: Emil Goode <emilgoode@xxxxxxxxx>
---
Hello,
This is only build tested, it would be good to get a comment
from someone who is familiar with this code.
Found using coccinelle.
Best regards,
Emil Goode
drivers/mfd/menelaus.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/mfd/menelaus.c b/drivers/mfd/menelaus.c
index ad25bfa..4859597 100644
--- a/drivers/mfd/menelaus.c
+++ b/drivers/mfd/menelaus.c
@@ -466,7 +466,7 @@ static int menelaus_set_voltage(const struct menelaus_vtg *vtg, int mV,
struct i2c_client *c = the_menelaus->client;
mutex_lock(&the_menelaus->lock);
- if (!vtg)
+ if (vtg_val == 0)
goto set_voltage;
ret = menelaus_read_reg(vtg->vtg_reg);
--
1.7.10.4
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