linux-kernel - [PATCH] nvme-pci: refresh visible attrs after being checked

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Message-ID: <01020191b7b7adc0-bca16d06-b051-4ce2-bfee-c8038a62462f-000000@eu-west-1.amazonses.com>
Date: Tue, 3 Sep 2024 11:49:13 +0000
From: Eugen Hristev <eugen.hristev@...labora.com>
To: linux-kernel@...r.kernel.org, linux-nvme@...ts.infradead.org
Cc: kbusch@...nel.org, sagi@...mberg.me, hch@....de, 
	Eugen Hristev <eugen.hristev@...labora.com>
Subject: [PATCH] nvme-pci: refresh visible attrs after being checked

The sysfs attributes are registered early, but the driver does not
know whether they are needed or not at that moment.
For the cmb attributes, commit
e917a849c3fc ("nvme-pci: refresh visible attrs for cmb attributes")
solved this problem by calling `nvme_update_attrs` after mapping the cmb.
However the issue persists for the hmb attributes.
To solve the problem, moved the call to `nvme_update_attrs` after
`nvme_setup_host_mem` is called, the one that sets up the hmb, in probe
and in reset_work functions.

Fixes: e917a849c3fc ("nvme-pci: refresh visible attrs for cmb attributes")
Fixes: 86adbf0cdb9e ("nvme: simplify transport specific device attribute handling")
Signed-off-by: Eugen Hristev <eugen.hristev@...labora.com>
---
 drivers/nvme/host/pci.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index e6267a6aa380..9455c4d53d7d 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -1878,8 +1878,6 @@ static void nvme_map_cmb(struct nvme_dev *dev)
 	if ((dev->cmbsz & (NVME_CMBSZ_WDS | NVME_CMBSZ_RDS)) ==
 			(NVME_CMBSZ_WDS | NVME_CMBSZ_RDS))
 		pci_p2pmem_publish(pdev, true);
-
-	nvme_update_attrs(dev);
 }
 
 static int nvme_set_host_mem(struct nvme_dev *dev, u32 bits)
@@ -2736,6 +2734,8 @@ static void nvme_reset_work(struct work_struct *work)
 	if (result < 0)
 		goto out;
 
+	nvme_update_attrs(dev);
+
 	result = nvme_setup_io_queues(dev);
 	if (result)
 		goto out;
@@ -3046,6 +3046,8 @@ static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	if (result < 0)
 		goto out_disable;
 
+	nvme_update_attrs(dev);
+
 	result = nvme_setup_io_queues(dev);
 	if (result)
 		goto out_disable;
-- 
2.34.1