From: Keith Busch <kbusch@kernel.org>
To: linux-nvme@lists.infradead.org, hch@lst.de, sagi@grimberg.me
Cc: Keith Busch <kbusch@kernel.org>
Subject: [PATCH 1/3] nvme-pci: clear shadow doorbell memory on resets
Date: Mon, 27 Apr 2020 16:52:41 -0700 [thread overview]
Message-ID: <20200427235243.2268765-1-kbusch@kernel.org> (raw)
The host memory doorbell and event buffers need to be initialized on
each reset so the driver doesn't observe stale values from the previous
instantiation.
Signed-off-by: Keith Busch <kbusch@kernel.org>
---
drivers/nvme/host/pci.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index cf386c84588b..d388fff9c358 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -228,8 +228,11 @@ static int nvme_dbbuf_dma_alloc(struct nvme_dev *dev)
{
unsigned int mem_size = nvme_dbbuf_size(dev->db_stride);
- if (dev->dbbuf_dbs)
+ if (dev->dbbuf_dbs) {
+ memset(dev->dbbuf_dbs, 0, mem_size);
+ memset(dev->dbbuf_eis, 0, mem_size);
return 0;
+ }
dev->dbbuf_dbs = dma_alloc_coherent(dev->dev, mem_size,
&dev->dbbuf_dbs_dma_addr,
--
2.24.1
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next reply other threads:[~2020-04-27 23:52 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-27 23:52 Keith Busch [this message]
2020-04-27 23:52 ` [PATCH 2/3] nvme-pci: remove cached shadow doorbell offsets Keith Busch
2020-04-30 6:36 ` Dongli Zhang
2020-04-30 19:07 ` Keith Busch
2020-05-01 12:54 ` Christoph Hellwig
2021-10-04 9:42 ` John Levon
2020-04-27 23:52 ` [PATCH 3/3] nvme-pci: reshuffle nvme_queue members Keith Busch
2020-05-01 12:57 ` Christoph Hellwig
2020-05-01 15:08 ` Keith Busch
2020-05-01 15:12 ` Christoph Hellwig
2020-05-01 15:23 ` Keith Busch
2020-05-04 18:18 ` Keith Busch
2020-05-01 12:49 ` [PATCH 1/3] nvme-pci: clear shadow doorbell memory on resets Christoph Hellwig
2021-10-04 9:35 ` John Levon
2021-10-06 12:07 ` Keith Busch
2021-10-06 16:05 ` John Levon
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