The recent set_affinity commit by me introduced some null
pointer dereferences on driver unload, because some drivers
call this function with a NULL argument. This fixes the issue
by just checking for null before setting the affinity mask.
Fixes: e2e64a932556 ("genirq: Set initial affinity in irq_set_affinity_hint()")
Reported-by: Yinghai Lu <ying...@kernel.org>
Signed-off-by: Jesse Brandeburg <jesse.brandeb...@intel.com>
CC: Thomas Gleixner <t...@linutronix.de>
CC: net...@vger.kernel.org
---
kernel/irq/manage.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index f038e58..196a06f 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -244,7 +244,8 @@ int irq_set_affinity_hint(unsigned int irq, const struct
cpumask *m)
desc->affinity_hint = m;
irq_put_desc_unlock(desc, flags);
/* set the initial affinity to prevent every interrupt being on CPU0 */
- __irq_set_affinity(irq, m, false);
+ if (m)
+ __irq_set_affinity(irq, m, false);
return 0;
}
EXPORT_SYMBOL_GPL(irq_set_affinity_hint);
--
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