Re: [PATCH] mmc: sdhci: Ignore unexpected CARD_INT interrupts

[Greg KH <gregkh@linuxfoundation.org>]

On Wed, Jan 25, 2017 at 11:23:35PM -0200, Gabriel Krisman Bertazi wrote:
> Hi Greg,
> 
> The following patch prevents an illegal command from getting sent to SD
> cards, which in turn avoids a lock-up during boot.  Can you please apply
> to the 4.9 and 4.4 stable trees?
> 
> The patch was generated against the 4.9 and there will be a trivial
> context conflict when applying to the 4.4.y branch.  If you prefer, I
> can resend another version against that branch.
> 
> Thanks!
> 
> -- >8 --
> 
> commit 5b19196de18e1522630326c80a40a64181c78a1c upstream.

I don't see this commit in Linus's tree, are you sure you got it
correct?

> One of our kernelCI boxes hanged at boot because a faulty eSDHC device
> was triggering spurious CARD_INT interrupts for SD cards, causing CMD52
> reads, which are not allowed for SD devices.  This adds a sanity check
> to the interruption path, preventing that illegal command from getting
> sent if the CARD_INT interruption should be disabled.
> 
> This quirk allows that particular machine to resume boot despite the
> faulty hardware, instead of getting hung dealing with thousands of
> mishandled interrupts.
> 
> Suggested-by: Adrian Hunter <adrian.hunter@intel.com>
> Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.co.uk>
> Acked-by: Adrian Hunter <adrian.hunter@intel.com>
> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
> (cherry picked from commit 5b19196de18e1522630326c80a40a64181c78a1c)
> ---
>  drivers/mmc/host/sdhci.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)

Are you sure this is in Linus's tree?  I can't find it anywhere.

You did read Documentation/stable_kernel_rules.txt, right?

thanks,

greg k-h