On Sun, Mar 24, 2019 at 08:32:12PM +0300, Sergei Shtylyov wrote:
> Commit 5c27ff5db1491a947264d6d4e4cbe43ae6535bae upstream.
>
> I have encountered an interrupt storm during the eMMC chip probing (and
> the chip finally didn't get detected). It turned out that U-Boot left
> the DMAC interrupts enabled while the Linux driver didn't use those.
> The SDHI driver's interrupt handler somehow assumes that, even if an
> SDIO interrupt didn't happen, it should return IRQ_HANDLED. I think
> that if none of the enabled interrupts happened and got handled, we
> should return IRQ_NONE -- that way the kernel IRQ code recoginizes
> a spurious interrupt and masks it off pretty quickly...
>
> Fixes: 7729c7a232a9 ("mmc: tmio: Provide separate interrupt handlers")
> Signed-off-by: Sergei Shtylyov <sergei.shtylyov@xxxxxxxxxxxxxxxxxx>
>
> ---
> The patch is against the 'linux-4.4.y' branch of the -stable repo.
Now queued up, thanks!
greg k-h
