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 <schne...@linux.ibm.com>
---
drivers/nvme/host/pci.c | 16 +++++++---------
1 file changed, 7 insertions(+), 9 deletions(-)
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index b56250b83bdf..0f8cea5b30eb 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -2089,6 +2089,12 @@ 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;
}
@@ -2107,15 +2113,7 @@ 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;
--
2.17.1
