[PATCH v3] nvme: update firmware version after commit

[Daniel Wagner <dwagner@suse.de>]

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@gmail.com>
Signed-off-by: Daniel Wagner <dwagner@suse.de>
---

Only compile tested. Asked for testing.

changes:

v3:
  - use afi variable directly, no _to_cpu helper
  - fix bit mask size

v2:
  - use fw slot info instead issuing another identify controller command
  - https://lore.kernel.org/linux-nvme/20231013163420.3097-1-dwagner@suse.de

v1:
  - initial version
  - https://lore.kernel.org/linux-nvme/20231013062623.6745-1-dwagner@suse.de/


 drivers/nvme/host/core.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 37b6fa746662..e8511bff78d2 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -4053,8 +4053,21 @@ static void nvme_get_fw_slot_info(struct nvme_ctrl *ctrl)
 		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;
+	}
+
+	if (log->afi & 0x70) {
+		dev_info(ctrl->device,
+			 "Firmware is activated after next Controller Level Reset\n");
+		goto out_free_log;
+	}
+
+	memcpy(ctrl->subsys->firmware_rev, &log->frs[log->afi & 0x7],
+		sizeof(ctrl->subsys->firmware_rev));
+
+out_free_log:
 	kfree(log);
 }
 
-- 
2.42.0