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.
>
