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scsi: ufs: core: Start the RTC update work later

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BugLink: https://bugs.launchpad.net/bugs/2100292

commit 54c814c8b23bc7617be3d46abdb896937695dbfa upstream.

The RTC update work involves runtime resuming the UFS controller. Hence,
only start the RTC update work after runtime power management in the UFS
driver has been fully initialized. This patch fixes the following kernel
crash:

Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Workqueue: events ufshcd_rtc_work
Call trace:
 _raw_spin_lock_irqsave+0x34/0x8c (P)
 pm_runtime_get_if_active+0x24/0x9c (L)
 pm_runtime_get_if_active+0x24/0x9c
 ufshcd_rtc_work+0x138/0x1b4
 process_one_work+0x148/0x288
 worker_thread+0x2cc/0x3d4
 kthread+0x110/0x114
 ret_from_fork+0x10/0x20

Reported-by: Neil Armstrong <neil.armstrong@linaro.org>
Closes: https://lore.kernel.org/linux-scsi/0c0bc528-fdc2-4106-bc99-f23ae377f6f5@linaro.org/
Fixes: 6bf999e0eb ("scsi: ufs: core: Add UFS RTC support")
Cc: Bean Huo <beanhuo@micron.com>
Cc: stable@vger.kernel.org
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20241031212632.2799127-1-bvanassche@acm.org
Reviewed-by: Peter Wang <peter.wang@mediatek.com>
Reviewed-by: Bean Huo <beanhuo@micron.com>
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8650-HDK
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
CVE-2024-53067
Signed-off-by: Koichiro Den <koichiro.den@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
This commit is contained in:
Bart Van Assche
2025-02-26 22:49:14 +09:00
committed by Stefan Bader
parent c2e0489153
commit 569bd98ad7
1 changed files with 8 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/ufs/core/ufshcd.c
+8 -2
View File
@@ -8734,6 +8734,14 @@ static int ufshcd_add_lus(struct ufs_hba *hba)
ufshcd_init_clk_scaling_sysfs(hba);
}
/*
* The RTC update code accesses the hba->ufs_device_wlun->sdev_gendev
* pointer and hence must only be started after the WLUN pointer has
* been initialized by ufshcd_scsi_add_wlus().
*/
schedule_delayed_work(&hba->ufs_rtc_update_work,
msecs_to_jiffies(UFS_RTC_UPDATE_INTERVAL_MS));
ufs_bsg_probe(hba);
scsi_scan_host(hba->host);
@@ -8893,8 +8901,6 @@ static int ufshcd_device_init(struct ufs_hba *hba, bool init_dev_params)
ufshcd_force_reset_auto_bkops(hba);
ufshcd_set_timestamp_attr(hba);
schedule_delayed_work(&hba->ufs_rtc_update_work,
msecs_to_jiffies(UFS_RTC_UPDATE_INTERVAL_MS));
/* Gear up to HS gear if supported */
if (hba->max_pwr_info.is_valid) {