diff options
| author | Niklas Schnelle <schnelle@linux.ibm.com> | 2020-11-12 11:23:02 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2020-12-01 22:36:36 +0300 |
| commit | e3aef0950a30ecbf475be52509ca178907410709 (patch) | |
| tree | 00ea68cdbfaf1076f72e98e35c7a18edf36eca46 /drivers/nvme | |
| parent | ff4e5fbad06f762b8551da56e8fd64ad14c8aa3e (diff) | |
| download | linux-e3aef0950a30ecbf475be52509ca178907410709.tar.xz | |
nvme-pci: don't allocate unused I/O queues
currently the NVME_QUIRK_SHARED_TAGS quirk for Apple devices is handled
during the assignment of nr_io_queues in nvme_setup_io_queues().
This however means that for these devices nvme_max_io_queues() will
actually not return the supported maximum which is confusing and
unexpected and also means that in nvme_probe() we are allocating
for I/O queues that will never be used.
Fix this by moving the quirk handling into nvme_max_io_queues().
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/nvme')
| -rw-r--r-- | drivers/nvme/host/pci.c | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 90b338435021..2c072f33a577 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -2088,6 +2088,12 @@ static void nvme_disable_io_queues(struct nvme_dev *dev) static unsigned int nvme_max_io_queues(struct nvme_dev *dev) { + /* + * If tags are shared with admin queue (Apple bug), then + * make sure we only use one IO queue. + */ + if (dev->ctrl.quirks & NVME_QUIRK_SHARED_TAGS) + return 1; return num_possible_cpus() + dev->nr_write_queues + dev->nr_poll_queues; } @@ -2106,15 +2112,7 @@ static int nvme_setup_io_queues(struct nvme_dev *dev) dev->nr_write_queues = write_queues; dev->nr_poll_queues = poll_queues; - /* - * If tags are shared with admin queue (Apple bug), then - * make sure we only use one IO queue. - */ - if (dev->ctrl.quirks & NVME_QUIRK_SHARED_TAGS) - nr_io_queues = 1; - else - nr_io_queues = dev->nr_allocated_queues - 1; - + nr_io_queues = dev->nr_allocated_queues - 1; result = nvme_set_queue_count(&dev->ctrl, &nr_io_queues); if (result < 0) return result; |