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| author | Sam Bradshaw <sbradshaw@micron.com> | 2014-07-29 13:31:36 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2014-11-04 13:17:08 -0700 |
| commit | 5905535610fc6b11379a999ff45bfa39f0d605b6 (patch) | |
| tree | 53ab6a05b536836a31365822a6bd319b4fc00714 /drivers/block | |
| parent | 302c6727e5eb4d0be0e02d077b65feb3e73ea254 (diff) | |
| download | linux-5905535610fc6b11379a999ff45bfa39f0d605b6.tar.gz linux-5905535610fc6b11379a999ff45bfa39f0d605b6.tar.bz2 linux-5905535610fc6b11379a999ff45bfa39f0d605b6.zip | |
NVMe: Correctly handle IOCTL_SUBMIT_IO when cpus > online queues
nvme_submit_io_cmd() uses smp_processor_id() to pick an IO queue index.
This patch fixes the case where there are more cpus from which the ioctl
call can originate than online queues, which can happen when a device
supports or was allocated fewer interrupt vectors than exist cpu cores.
Thanks to Keith Busch for the implementation suggestion.
Signed-off-by: Sam Bradshaw <sbradshaw@micron.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/nvme-core.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/block/nvme-core.c b/drivers/block/nvme-core.c index 48a1be4ab24c..5d44c9344522 100644 --- a/drivers/block/nvme-core.c +++ b/drivers/block/nvme-core.c @@ -984,8 +984,8 @@ int nvme_submit_admin_cmd(struct nvme_dev *dev, struct nvme_command *cmd, int nvme_submit_io_cmd(struct nvme_dev *dev, struct nvme_command *cmd, u32 *result) { - return nvme_submit_sync_cmd(dev, smp_processor_id() + 1, cmd, result, - NVME_IO_TIMEOUT); + return nvme_submit_sync_cmd(dev, this_cpu_read(*dev->io_queue), cmd, + result, NVME_IO_TIMEOUT); } static int nvme_submit_admin_cmd_async(struct nvme_dev *dev, |