[PATCH v4] ufs: core: wlun send SSU timeout recovery

[Peter Wang (王信友)]

On Tue, 2023-09-26 at 11:29 -0700, Bart Van Assche wrote:
>  	 
> External email : Please do not click links or open attachments until
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>  On 9/22/23 02:09, peter.wang at mediatek.com wrote:
> > +/*
> > + * If runtime pm send SSU and got timeout, scsi_error_handler
> > + * stuck at this function to wait flush_work(&hba->eh_work).
> > + * And ufshcd_err_handler(eh_work) stuck at wait runtime pm
> active.
> > + * Do ufshcd_link_recovery instead shedule eh_work can prevent
> > + * dead lock happen.
> > + */
> 
> The above comment is hard to understand because of grammatical
> issues.
> Please try to improve this comment. A few examples: I think that
> "wait"
> should be changed into "wait for" and also that "happen" should be
> changed
> into "to happen".
> 
> > +dev = &hba->ufs_device_wlun->sdev_gendev;
> > +if ((dev->power.runtime_status == RPM_RESUMING) ||
> > +(dev->power.runtime_status == RPM_SUSPENDING)) {
> > +err = ufshcd_link_recovery(hba);
> > +if (err) {
> > +dev_err(hba->dev, "WL Device PM: status:%d, err:%d\n",
> > +dev->power.runtime_status,
> > +dev->power.runtime_error);
> > +}
> > +return err;
> > +}
> 
> ufshcd_link_recovery() returns a Unix error code (e.g. -ETIMEDOUT)
> while
> ufshcd_eh_host_reset_handler() should return one of the following
> values:
> SUCCESS or FAILED. Please fix this.
> 
> Thanks,
> 
> Bart.

Hi Bart,

Thanks for review.
I will correct comment and chnage return value, Also make it more
simple by check pm_op_in_progress.

Thanks.

Peter