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scsi: ufs: Track system suspend / resume activity

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Add a new boolean variable that tracks whether the system is suspending,
suspended or resuming. This information will be used in a later commit to
fix a deadlock between the SCSI error handler and the suspend code.

Reviewed-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20221018202958.1902564-9-bvanassche@acm.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Bart Van Assche 2022-10-18 13:29:56 -07:00 committed by Martin K. Petersen
parent 579a4e9dbd
commit 1a547cbc6f
2 changed files with 6 additions and 1 deletions
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2
drivers/ufs/core/ufshcd.c
View File

@ -9247,6 +9247,7 @@ static int ufshcd_wl_suspend(struct device *dev)
hba = shost_priv(sdev->host);
down(&hba->host_sem);
hba->system_suspending = true;
if (pm_runtime_suspended(dev))
goto out;
@ -9288,6 +9289,7 @@ out:
hba->curr_dev_pwr_mode, hba->uic_link_state);
if (!ret)
hba->is_sys_suspended = false;
hba->system_suspending = false;
up(&hba->host_sem);
return ret;
}

5
include/ufs/ufshcd.h
View File

@ -802,7 +802,9 @@ struct ufs_hba_monitor {
* @caps: bitmask with information about UFS controller capabilities
* @devfreq: frequency scaling information owned by the devfreq core
* @clk_scaling: frequency scaling information owned by the UFS driver
* @is_sys_suspended: whether or not the entire system has been suspended
* @system_suspending: system suspend has been started and system resume has
* not yet finished.
* @is_sys_suspended: UFS device has been suspended because of system suspend
* @urgent_bkops_lvl: keeps track of urgent bkops level for device
* @is_urgent_bkops_lvl_checked: keeps track if the urgent bkops level for
* device is known or not.
@ -943,6 +945,7 @@ struct ufs_hba {
struct devfreq *devfreq;
struct ufs_clk_scaling clk_scaling;
bool system_suspending;
bool is_sys_suspended;
enum bkops_status urgent_bkops_lvl;