of/irq: Avoid calling list_first_entry() for empty list
authorAxel Lin <axel.lin@ingics.com>
Sun, 23 Jun 2013 07:50:07 +0000 (15:50 +0800)
committerGrant Likely <grant.likely@linaro.org>
Mon, 22 Jul 2013 18:40:38 +0000 (19:40 +0100)
commitc0cdfaa0a5e7a346ac2f661f63f543cdc5f7cbbe
treea50fe3d27f2bcb9aa00e2c2b6e6c428e1c86618c
parentcfd1ee3e37360ac6ec8c737e63e70c5d583f1e51
of/irq: Avoid calling list_first_entry() for empty list

list_first_entry() expects the list is not empty, we need to check if list is
empty before calling list_first_entry(). Thus use list_first_entry_or_null()
instead of list_first_entry().

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
drivers/of/irq.c