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| author | Vinod Koul <vkoul@kernel.org> | 2020-09-11 15:15:36 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2020-09-11 15:15:36 +0300 |
| commit | 4c80e9323967125ab8aa7c271ccc7624abc08832 (patch) | |
| tree | c9881b5814c184aa0c1cb58c6383beab9173e388 /kernel/irq/matrix.c | |
| parent | ef759e4a28c88965972c815af6023f41bd733316 (diff) | |
| parent | f4d51dffc6c01a9e94650d95ce0104964f8ae822 (diff) | |
| download | linux-4c80e9323967125ab8aa7c271ccc7624abc08832.tar.xz | |
Merge tag 'v5.9-rc4' into next
Linux 5.9-rc4
Diffstat (limited to 'kernel/irq/matrix.c')
| -rw-r--r-- | kernel/irq/matrix.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/irq/matrix.c b/kernel/irq/matrix.c index 30cc217b8631..651a4ad6d711 100644 --- a/kernel/irq/matrix.c +++ b/kernel/irq/matrix.c @@ -380,6 +380,13 @@ int irq_matrix_alloc(struct irq_matrix *m, const struct cpumask *msk, unsigned int cpu, bit; struct cpumap *cm; + /* + * Not required in theory, but matrix_find_best_cpu() uses + * for_each_cpu() which ignores the cpumask on UP . + */ + if (cpumask_empty(msk)) + return -EINVAL; + cpu = matrix_find_best_cpu(m, msk); if (cpu == UINT_MAX) return -ENOSPC; |