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| author | Jesse Brandeburg <jesse.brandeburg@intel.com> | 2015-01-28 10:57:39 -0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-02-09 18:47:42 +0100 |
| commit | 4fe7ffb7e17ca6ad9173b8de35f260c9c8fc2f79 (patch) | |
| tree | cd4bf3e96e474ae0e2f99e54dc9d6f9343542a92 /kernel | |
| parent | fb7e7deb7fc348ae131268d30e391c8184285de6 (diff) | |
| download | op-kernel-dev-4fe7ffb7e17ca6ad9173b8de35f260c9c8fc2f79.zip op-kernel-dev-4fe7ffb7e17ca6ad9173b8de35f260c9c8fc2f79.tar.gz | |
genirq: Fix null pointer reference in irq_set_affinity_hint()
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 <yinghai@kernel.org>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
CC: netdev@vger.kernel.org
Link: http://lkml.kernel.org/r/20150128185739.9689.84588.stgit@jbrandeb-cp2.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/irq/manage.c | 3 |
1 files changed, 2 insertions, 1 deletions
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); |
