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authorThomas Gleixner <tglx@linutronix.de>2008-11-07 13:18:30 +0100
committerIngo Molnar <mingo@elte.hu>2008-11-09 22:23:49 +0100
commitf6d87f4bd259cf33e092cd1a8fde05f291c47af1 (patch)
treeabaa66af3c80fb18a20004b8d97261c680551792 /kernel/irq/proc.c
parent8b805ef617cf0e02f6d18b891f8deb6246421b01 (diff)
genirq: keep affinities set from userspace across free/request_irq()
Impact: preserve user-modified affinities on interrupts Kumar Galak noticed that commit 18404756765c713a0be4eb1082920c04822ce588 (genirq: Expose default irq affinity mask (take 3)) overrides an already set affinity setting across a free / request_irq(). Happens e.g. with ifdown/ifup of a network device. Change the logic to mark the affinities as set and keep them intact. This also fixes the unlocked access to irq_desc in irq_select_affinity() when called from irq_affinity_proc_write() Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/irq/proc.c')
-rw-r--r--kernel/irq/proc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index 4d161c70ba55..d257e7d6a8a4 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -62,7 +62,7 @@ static ssize_t irq_affinity_proc_write(struct file *file,
if (!cpus_intersects(new_value, cpu_online_map))
/* Special case for empty set - allow the architecture
code to set default SMP affinity. */
- return irq_select_affinity(irq) ? -EINVAL : count;
+ return irq_select_affinity_usr(irq) ? -EINVAL : count;
irq_set_affinity(irq, new_value);