linux-kernel - [PATCH v2] nvme: update firmware version after commit

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Message-ID: <20231013163420.3097-1-dwagner@suse.de>
Date:   Fri, 13 Oct 2023 18:34:20 +0200
From:   Daniel Wagner <dwagner@...e.de>
To:     linux-nvme@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, Keith Busch <kbusch@...nel.org>,
        Christoph Hellwig <hch@....de>,
        Niklas Cassel <Niklas.Cassel@....com>,
        Daniel Wagner <dwagner@...e.de>,
        Kenji Tomonaga <tkenbo@...il.com>
Subject: [PATCH v2] nvme: update firmware version after commit

The firmware version sysfs entry needs to be updated after a successfully
firmware activation.

nvme-cli stopped issuing an Identify Controller command to list the
current firmware information and relies on sysfs showing the current
firmware version.

Reported-by: Kenji Tomonaga <tkenbo@...il.com>
Signed-off-by: Daniel Wagner <dwagner@...e.de>
---

Only compile tested. So you might want to wait until I am back from my vacation.

 drivers/nvme/host/core.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 21783aa2ee8e..686478555585 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -4067,14 +4067,29 @@ static bool nvme_ctrl_pp_status(struct nvme_ctrl *ctrl)
 static void nvme_get_fw_slot_info(struct nvme_ctrl *ctrl)
 {
 	struct nvme_fw_slot_info_log *log;
+	u64 afi;
 
 	log = kmalloc(sizeof(*log), GFP_KERNEL);
 	if (!log)
 		return;
 
 	if (nvme_get_log(ctrl, NVME_NSID_ALL, NVME_LOG_FW_SLOT, 0, NVME_CSI_NVM,
-			log, sizeof(*log), 0))
+			 log, sizeof(*log), 0)) {
 		dev_warn(ctrl->device, "Get FW SLOT INFO log error\n");
+		goto out_free_log;
+	}
+
+	afi = le64_to_cpu(log->afi);
+	if (afi & 0x30) {
+		dev_info(ctrl->device,
+			 "Firmware is activated after next Controller Level Reset\n");
+		goto out_free_log;
+	}
+
+	memcpy(ctrl->subsys->firmware_rev, &log->frs[afi & 0x3],
+		sizeof(ctrl->subsys->firmware_rev));
+
+out_free_log:
 	kfree(log);
 }
 
-- 
2.42.0