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| author | Axel Lin <axel.lin@ingics.com> | 2013-06-23 11:50:07 +0400 |
|---|---|---|
| committer | Grant Likely <grant.likely@linaro.org> | 2013-07-22 22:40:38 +0400 |
| commit | c0cdfaa0a5e7a346ac2f661f63f543cdc5f7cbbe (patch) | |
| tree | a50fe3d27f2bcb9aa00e2c2b6e6c428e1c86618c | |
| parent | cfd1ee3e37360ac6ec8c737e63e70c5d583f1e51 (diff) | |
| download | linux-c0cdfaa0a5e7a346ac2f661f63f543cdc5f7cbbe.tar.xz | |
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>
| -rw-r--r-- | drivers/of/irq.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/of/irq.c b/drivers/of/irq.c index a3c1c5aae6a9..5c645c7227b8 100644 --- a/drivers/of/irq.c +++ b/drivers/of/irq.c @@ -482,8 +482,9 @@ void __init of_irq_init(const struct of_device_id *matches) } /* Get the next pending parent that might have children */ - desc = list_first_entry(&intc_parent_list, typeof(*desc), list); - if (list_empty(&intc_parent_list) || !desc) { + desc = list_first_entry_or_null(&intc_parent_list, + typeof(*desc), list); + if (!desc) { pr_err("of_irq_init: children remain, but no parents\n"); break; } |