Re: [PATCH] bus: mhi: core: Use current ee in intvec handler for syserr

[Bhaumik Bhatt]

On 2021-02-15 11:32 PM, Manivannan Sadhasivam wrote:
> On Fri, Feb 12, 2021 at 05:40:14PM -0700, Jeffrey Hugo wrote:
> > The intvec handler stores the caches ee in a local variable for use in
> > processing the intvec.  When determining if a syserr is a fatal error 
> > or
> > not, the intvec handler is using the cached version, when it should be
> > using the current ee read from the device.  Currently, the device 
> > could
> > be in the PBL ee as the result of a fatal error, but the cached ee 
> > might
> > be AMSS, which would cause the intvec handler to incorrectly signal a
> > non-fatal syserr.
> >
> > Fixes: 3000f85b8f47 ("bus: mhi: core: Add support for basic PM 
> > operations")
> > Signed-off-by: Jeffrey Hugo <jhugo@xxxxxxxxxxxxxx>
>
> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
>
> Thanks,
> Mani
>
> > ---
> >  drivers/bus/mhi/core/main.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/bus/mhi/core/main.c b/drivers/bus/mhi/core/main.c
> > index 4e0131b..f182736 100644
> > --- a/drivers/bus/mhi/core/main.c
> > +++ b/drivers/bus/mhi/core/main.c
> > @@ -448,7 +448,7 @@ irqreturn_t mhi_intvec_threaded_handler(int 
> > irq_number, void *priv)
> >  		wake_up_all(&mhi_cntrl->state_event);
> >
> >  		/* For fatal errors, we let controller decide next step */
> > -		if (MHI_IN_PBL(ee))
> > +		if (MHI_IN_PBL(mhi_cntrl->ee))
> >  			mhi_cntrl->status_cb(mhi_cntrl, MHI_CB_FATAL_ERROR);
> >  		else
> >  			mhi_pm_sys_err_handler(mhi_cntrl);
> > --
> > Qualcomm Technologies, Inc. is a member of the
> > Code Aurora Forum, a Linux Foundation Collaborative Project.

This was being fixed by my patch series for execution environment.

I should just send the most important of my patches as one line fixers 
from now on.

Thanks,
Bhaumik
---
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