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irq: Do not attempt to create subdirectories if /proc/irq/<irq> failed

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If a parent directory (ie /proc/irq/<irq>) could not be created
we should not attempt to create subdirectories. Otherwise it
would lead that "smp_affinity" and "spurious" entries are may be
registered under /proc root instead of a proper place.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Yinghai Lu <yinghai@kernel.org>
LKML-Reference: <20091026202811.GD5321@lenovo>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Cyrill Gorcunov 2009-10-26 23:28:11 +03:00 committed by Ingo Molnar
parent 663e695928
commit c82a43d40b
1 changed files with 2 additions and 0 deletions
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2
kernel/irq/proc.c
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@ -214,6 +214,8 @@ void register_irq_proc(unsigned int irq, struct irq_desc *desc)
/* create /proc/irq/1234 */ /* create /proc/irq/1234 */
desc->dir = proc_mkdir(name, root_irq_dir); desc->dir = proc_mkdir(name, root_irq_dir);
if (!desc->dir)
return;
#ifdef CONFIG_SMP #ifdef CONFIG_SMP
/* create /proc/irq/<irq>/smp_affinity */ /* create /proc/irq/<irq>/smp_affinity */