> On 5/9/2023 1:24 AM, Kiwoong Kim wrote:
> > With auto hibern8 enabled, UIC could be working for a while to process
> > a hibern8 operation and HCI reports UIC not ready for a short term
> > through HCS.UCRDY.
> > And UFS driver can't recognize the operation.
> > UFSHCI spec specifies UCRDY like this:
> > whether the host controller is ready to process UIC COMMAND
> >
> > The 'ready' could be seen as many different meanings. If the meaning
> > includes not processing any request from HCI, processing a hibern8
> > operation can be 'not ready'. In this situation, the driver needs to
> > wait until the operations is completed.
> >
> > Signed-off-by: Kiwoong Kim <kwmad.kim@xxxxxxxxxxx>
> > ---
> > drivers/ufs/core/ufshcd.c | 13 ++++++++++++-
> > 1 file changed, 12 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
> > index 96ce6af..fc79539 100644
> > --- a/drivers/ufs/core/ufshcd.c
> > +++ b/drivers/ufs/core/ufshcd.c
> > @@ -2368,7 +2368,18 @@ static inline int ufshcd_hba_capabilities(struct
> ufs_hba *hba)
> > */
> > static inline bool ufshcd_ready_for_uic_cmd(struct ufs_hba *hba)
> > {
> > - return ufshcd_readl(hba, REG_CONTROLLER_STATUS) & UIC_COMMAND_READY;
> > + ktime_t timeout = ktime_add_ms(ktime_get(), UIC_CMD_TIMEOUT);
> > + u32 val = 0;
> > +
> > + do {
> > + val = ufshcd_readl(hba, REG_CONTROLLER_STATUS) &
> > + UIC_COMMAND_READY;
> > + if (val)
> > + break;
> > + usleep_range(500, 1000);
> Hi Kiwoong,
> It looks like you are sleeping while holding the spin_lock_irqsave(hba-
> >host->host_lock, flags) in ufshcd_send_uic_cmd()?
Right. Let me fix it.
Thanks.
Kiwoong Kim
>
>
> > + } while (ktime_before(ktime_get(), timeout));
> > +
> > + return val ? true : false;
> > }
> >
> > /**
