From: Christoph Hellwig hch@lst.de
[ Upstream commit 6b8cf94005187952f794c0c4ed3920a1e8accfa3 ]
An NVMe controller works perfectly fine even when the hwmon initialization fails. Stop returning errors that do not come from a controller reset from nvme_hwmon_init to handle this case consistently.
Signed-off-by: Christoph Hellwig hch@lst.de Reviewed-by: Guenter Roeck linux@roeck-us.net Reviewed-by: Serge Semin fancer.lancer@gmail.com Stable-dep-of: c94b7f9bab22 ("nvme-hwmon: kmalloc the NVME SMART log buffer") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/nvme/host/core.c | 6 +++++- drivers/nvme/host/hwmon.c | 13 ++++++++----- 2 files changed, 13 insertions(+), 6 deletions(-)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 3527a0667568..92fe67bd2457 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -3088,8 +3088,12 @@ int nvme_init_ctrl_finish(struct nvme_ctrl *ctrl) return ret;
if (!ctrl->identified && !nvme_discovery_ctrl(ctrl)) { + /* + * Do not return errors unless we are in a controller reset, + * the controller works perfectly fine without hwmon. + */ ret = nvme_hwmon_init(ctrl); - if (ret < 0) + if (ret == -EINTR) return ret; }
diff --git a/drivers/nvme/host/hwmon.c b/drivers/nvme/host/hwmon.c index 0a586d712920..23918bb7bdca 100644 --- a/drivers/nvme/host/hwmon.c +++ b/drivers/nvme/host/hwmon.c @@ -230,7 +230,7 @@ int nvme_hwmon_init(struct nvme_ctrl *ctrl)
data = kzalloc(sizeof(*data), GFP_KERNEL); if (!data) - return 0; + return -ENOMEM;
data->ctrl = ctrl; mutex_init(&data->read_lock); @@ -238,8 +238,7 @@ int nvme_hwmon_init(struct nvme_ctrl *ctrl) err = nvme_hwmon_get_smart_log(data); if (err) { dev_warn(dev, "Failed to read smart log (error %d)\n", err); - kfree(data); - return err; + goto err_free_data; }
hwmon = hwmon_device_register_with_info(dev, "nvme", @@ -247,11 +246,15 @@ int nvme_hwmon_init(struct nvme_ctrl *ctrl) NULL); if (IS_ERR(hwmon)) { dev_warn(dev, "Failed to instantiate hwmon device\n"); - kfree(data); - return PTR_ERR(hwmon); + err = PTR_ERR(hwmon); + goto err_free_data; } ctrl->hwmon_device = hwmon; return 0; + +err_free_data: + kfree(data); + return err; }
void nvme_hwmon_exit(struct nvme_ctrl *ctrl)