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| author | Michael Hernandez <michael.hernandez@cavium.com> | 2017-05-18 20:47:47 +0300 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2017-05-22 23:06:05 +0300 |
| commit | 6f9a22bc5775d231ab8fbe2c2f3c88e45e3e7c28 (patch) | |
| tree | 1c783fb19be43cd07b3a1f7a32af66e64dba2958 /include/linux/interrupt.h | |
| parent | 2ea659a9ef488125eb46da6eb571de5eae5c43f6 (diff) | |
| download | linux-6f9a22bc5775d231ab8fbe2c2f3c88e45e3e7c28.tar.xz | |
PCI/MSI: Ignore affinity if pre/post vector count is more than min_vecs
min_vecs is the minimum amount of vectors needed to operate in MSI-X mode
which may just include the vectors that don't need affinity.
Disabling affinity settings causes the qla2xxx driver scsi_add_host() to fail
when blk_mq is enabled as the blk_mq_pci_map_queues() expects affinity masks
on each vector.
Fixes: dfef358bd1be ("PCI/MSI: Don't apply affinity if there aren't enough vectors left")
Signed-off-by: Michael Hernandez <michael.hernandez@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: stable@vger.kernel.org # v4.10+
Diffstat (limited to 'include/linux/interrupt.h')
| -rw-r--r-- | include/linux/interrupt.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h index a6fba4804672..0991f973f8ca 100644 --- a/include/linux/interrupt.h +++ b/include/linux/interrupt.h @@ -291,7 +291,7 @@ extern int irq_set_affinity_notifier(unsigned int irq, struct irq_affinity_notify *notify); struct cpumask *irq_create_affinity_masks(int nvec, const struct irq_affinity *affd); -int irq_calc_affinity_vectors(int maxvec, const struct irq_affinity *affd); +int irq_calc_affinity_vectors(int minvec, int maxvec, const struct irq_affinity *affd); #else /* CONFIG_SMP */ @@ -331,7 +331,7 @@ irq_create_affinity_masks(int nvec, const struct irq_affinity *affd) } static inline int -irq_calc_affinity_vectors(int maxvec, const struct irq_affinity *affd) +irq_calc_affinity_vectors(int minvec, int maxvec, const struct irq_affinity *affd) { return maxvec; } |