diff options
Diffstat (limited to 'drivers/mfd/twl4030-madc.c')
| -rw-r--r-- | 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 cb44b53..7cbf2aa 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; |