drivers/rtc/rtc-max8998.c: check for pdata presence before dereferencing

Currently the driver can crash with a NULL pointer dereference if no
pdata is provided, despite of successful registration of the MFD part.
This patch fixes the problem by adding a NULL check before dereferencing
the pdata pointer.

Signed-off-by: Tomasz Figa <>
Signed-off-by: Kyungmin Park <>
Cc: Sachin Kamat <>
Reviewed-by: Jingoo Han <>
Signed-off-by: Andrew Morton <>
Signed-off-by: Linus Torvalds <>
1 file changed