Messages in this thread Patch in this message | | | From | Sasha Levin <> | Subject | [PATCH AUTOSEL 4.19 10/15] nvme: free sq/cq dbbuf pointers when dbbuf set fails | Date | Wed, 25 Nov 2020 10:37:07 -0500 |
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From: Minwoo Im <minwoo.im.dev@gmail.com>
[ Upstream commit 0f0d2c876c96d4908a9ef40959a44bec21bdd6cf ]
If Doorbell Buffer Config command fails even 'dev->dbbuf_dbs != NULL' which means OACS indicates that NVME_CTRL_OACS_DBBUF_SUPP is set, nvme_dbbuf_update_and_check_event() will check event even it's not been successfully set.
This patch fixes mismatch among dbbuf for sq/cqs in case that dbbuf command fails.
Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/nvme/host/pci.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 3c68a5b35ec1b..a52b2f15f372a 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -276,9 +276,21 @@ static void nvme_dbbuf_init(struct nvme_dev *dev, nvmeq->dbbuf_cq_ei = &dev->dbbuf_eis[cq_idx(qid, dev->db_stride)]; } +static void nvme_dbbuf_free(struct nvme_queue *nvmeq) +{ + if (!nvmeq->qid) + return; + + nvmeq->dbbuf_sq_db = NULL; + nvmeq->dbbuf_cq_db = NULL; + nvmeq->dbbuf_sq_ei = NULL; + nvmeq->dbbuf_cq_ei = NULL; +} + static void nvme_dbbuf_set(struct nvme_dev *dev) { struct nvme_command c; + unsigned int i; if (!dev->dbbuf_dbs) return; @@ -292,6 +304,9 @@ static void nvme_dbbuf_set(struct nvme_dev *dev) dev_warn(dev->ctrl.device, "unable to set dbbuf\n"); /* Free memory and continue on */ nvme_dbbuf_dma_free(dev); + + for (i = 1; i <= dev->online_queues; i++) + nvme_dbbuf_free(&dev->queues[i]); } } -- 2.27.0
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