If the twl4030-madc device wasn't registered, and another device, such
as twl4030-madc-hwmon, calls twl4030_madc_conversion() a NULL pointer is
dereferenced.
Signed-off-by: Kyle Manna <kyle@xxxxxxxxxxxxx>
---
drivers/mfd/twl4030-madc.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/drivers/mfd/twl4030-madc.c b/drivers/mfd/twl4030-madc.c
index 99dd611..834f824 100644
--- a/drivers/mfd/twl4030-madc.c
+++ b/drivers/mfd/twl4030-madc.c
@@ -510,8 +510,9 @@ int twl4030_madc_conversion(struct twl4030_madc_request *req)
u8 ch_msb, ch_lsb;
int ret;
- if (!req)
+ if (!req || !twl4030_madc)
return -EINVAL;
+
mutex_lock(&twl4030_madc->lock);
if (req->method < TWL4030_MADC_RT || req->method > TWL4030_MADC_SW2) {
ret = -EINVAL;
--
1.7.4.1
--
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