commit 3e1e21c7bfcf upstream
Upstream is a near rewrite of the async nvme probe that ultimately didn't
even cleanly merge in 4.5. This patch is a much smaller change targeted
to the regression introduced in 4.4.
If a controller is in a degraded mode that needs admin assistence to
recover, we need to leave the controller running. We just want to disable
namespace access without shuting the controller down.
Fixes: 3cf519b5a8d4("nvme: merge nvme_dev_start, nvme_dev_resume and nvme_async_probe")
Cc: <stable@xxxxxxxxxxxxxxx> # 4.4.x
Signed-off-by: Keith Busch <keith.busch@xxxxxxxxx>
---
drivers/nvme/host/pci.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index d6ceb8b91cd6..1c8aedf21370 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -2976,10 +2976,16 @@ static void nvme_dev_shutdown(struct nvme_dev *dev)
mutex_unlock(&dev->shutdown_lock);
}
-static void nvme_dev_remove(struct nvme_dev *dev)
+static void nvme_remove_namespaces(struct nvme_dev *dev)
{
struct nvme_ns *ns, *next;
+ list_for_each_entry_safe(ns, next, &dev->namespaces, list)
+ nvme_ns_remove(ns);
+}
+
+static void nvme_dev_remove(struct nvme_dev *dev)
+{
if (nvme_io_incapable(dev)) {
/*
* If the device is not capable of IO (surprise hot-removal,
@@ -2989,8 +2995,7 @@ static void nvme_dev_remove(struct nvme_dev *dev)
*/
nvme_dev_shutdown(dev);
}
- list_for_each_entry_safe(ns, next, &dev->namespaces, list)
- nvme_ns_remove(ns);
+ nvme_remove_namespaces(dev);
}
static int nvme_setup_prp_pools(struct nvme_dev *dev)
@@ -3174,7 +3179,7 @@ static void nvme_probe_work(struct work_struct *work)
*/
if (dev->online_queues < 2) {
dev_warn(dev->dev, "IO queues not created\n");
- nvme_dev_remove(dev);
+ nvme_remove_namespaces(dev);
} else {
nvme_unfreeze_queues(dev);
nvme_dev_add(dev);
--
2.13.6