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| author | Srinivas Ramana <sramana@codeaurora.org> | 2018-12-20 19:05:57 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-03-05 17:57:59 +0100 |
| commit | 10a1f3195914fe650b326364ccbb942080ce72dd (patch) | |
| tree | 1e272ada60a17b627d7ceba7a96f6cf1c5a8f6c3 | |
| parent | c6733e3433ad463a6d64cabbf3d0a320f453bced (diff) | |
| download | linux-10a1f3195914fe650b326364ccbb942080ce72dd.tar.gz linux-10a1f3195914fe650b326364ccbb942080ce72dd.tar.bz2 linux-10a1f3195914fe650b326364ccbb942080ce72dd.zip | |
genirq: Make sure the initial affinity is not empty
[ Upstream commit bddda606ec76550dd63592e32a6e87e7d32583f7 ]
If all CPUs in the irq_default_affinity mask are offline when an interrupt
is initialized then irq_setup_affinity() can set an empty affinity mask for
a newly allocated interrupt.
Fix this by falling back to cpu_online_mask in case the resulting affinity
mask is zero.
Signed-off-by: Srinivas Ramana <sramana@codeaurora.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-arm-msm@vger.kernel.org
Link: https://lkml.kernel.org/r/1545312957-8504-1-git-send-email-sramana@codeaurora.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | kernel/irq/manage.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 4cd85870f00e..6c877d28838f 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -360,6 +360,9 @@ int irq_setup_affinity(struct irq_desc *desc) } cpumask_and(&mask, cpu_online_mask, set); + if (cpumask_empty(&mask)) + cpumask_copy(&mask, cpu_online_mask); + if (node != NUMA_NO_NODE) { const struct cpumask *nodemask = cpumask_of_node(node); |