linux/drivers/mmc
Gabriel Krisman Bertazi 161e6d44a5 mmc: sdhci: Ignore unexpected CARD_INT interrupts
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>
Cc: <stable@vger.kernel.org>
2017-01-31 11:26:49 +01:00
..
core mmc: core: Restore parts of the polling policy when switch to HS/HS DDR 2017-01-16 16:17:42 +01:00
host mmc: sdhci: Ignore unexpected CARD_INT interrupts 2017-01-31 11:26:49 +01:00
Kconfig mmc: block: Move files to core 2016-12-12 16:30:05 +01:00
Makefile mmc: block: Move files to core 2016-12-12 16:30:05 +01:00