Re: [PATCH v5 1/7] scsi: ufs: Add "wb_on" sysfs node to control WB on/off

Bean Huo
2020-12-23T09:11:51Z

On Wed, 2020-12-23 at 09:31 +0800, Can Guo wrote:
> And assume you come up with a better check,
> you want to add the check everywhere? You must have noticed the fix
> to
> the func ufshcd_clk_gate_enable_store() from Jaegeuk Kim.

Do you mean lock spin_lock_irqsave(hba->host->host_lock, flags)?
It can completely fix race issue, but it is different with here.
ufshcd_clkgate_enable_store() doesn't call ufshcd_hold().
If you want using this lock, we should change ufshcd_hold() and
ufshcd_query_*().

Bean