On Tue, 22 Sep 2020 00:09:04 -0700, Can Guo wrote:
> If someone plays with the UFS clk scaling devfreq governor through sysfs,
> ufshcd_devfreq_scale may be called even when hba is not runtime ACTIVE,
> which can lead to unexpected error. We cannot just protect it by calling
> pm_runtime_get_sync, because that may cause racing problem since hba
> runtime suspend ops needs to suspend clk scaling. In order to fix it, call
> pm_runtime_get_noresume and check hba's runtime status, then only proceed
> if hba is runtime ACTIVE, otherwise just bail.
>
> [...]
Applied to 5.10/scsi-fixes, thanks!
[1/1] scsi: ufs: Make sure clk scaling happens only when HBA is runtime ACTIVE
https://git.kernel.org/mkp/scsi/c/73cc291c2702
--
Martin K. Petersen Oracle Linux Engineering
