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From: Hannes Reinecke <hare@suse.de>
To: Christoph Hellwig <hch@lst.de>
Cc: Keith Busch <keith.busch@intel.com>,
	Sagi Grimberg <sagi@grimberg.me>,
	linux-nvme@lists.infradead.org, Hannes Reinecke <hare@suse.de>
Subject: [PATCH] nvme: always treat DNR status as no-retryable
Date: Tue, 26 Nov 2019 14:37:49 +0100
Message-ID: <20191126133749.72267-1-hare@suse.de> (raw)

If the DNR bit is set in the command status we should not retry
the command, irrespective of what the actual status is.
So map it directly to BLK_STS_TARGET to inform upper layers to
not retry the command, not even on another path.

Signed-off-by: Hannes Reinecke <hare@suse.de>
---
 drivers/nvme/host/core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 752a40daf2b3..f015f6e91c85 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -198,6 +198,9 @@ static inline bool nvme_ns_has_pi(struct nvme_ns *ns)
 
 static blk_status_t nvme_error_status(u16 status)
 {
+	if (status & NVME_SC_DNR)
+		return BLK_STS_TARGET;
+
 	switch (status & 0x7ff) {
 	case NVME_SC_SUCCESS:
 		return BLK_STS_OK;
-- 
2.16.4


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Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-26 13:37 Hannes Reinecke [this message]
2019-11-26 16:15 ` Keith Busch
2019-11-26 16:34   ` Hannes Reinecke
2019-11-26 16:39     ` Christoph Hellwig
2019-11-26 16:22 ` Christoph Hellwig
2019-11-26 16:28   ` Hannes Reinecke

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