diff options
| author | Gabriel Krisman Bertazi <krisman@collabora.co.uk> | 2017-01-16 17:23:42 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2017-01-31 13:26:49 +0300 |
| commit | 161e6d44a5e2d3f85365cb717d60e363171b39e6 (patch) | |
| tree | 5c8b730a137696ef979f05ceae869b6e0348794c /drivers/mmc | |
| parent | 566cf877a1fcb6d6dc0126b076aad062054c2637 (diff) | |
| download | linux-161e6d44a5e2d3f85365cb717d60e363171b39e6.tar.xz | |
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>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 23909804ffb8..0def99590d16 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -2733,7 +2733,8 @@ static irqreturn_t sdhci_irq(int irq, void *dev_id) if (intmask & SDHCI_INT_RETUNE) mmc_retune_needed(host->mmc); - if (intmask & SDHCI_INT_CARD_INT) { + if ((intmask & SDHCI_INT_CARD_INT) && + (host->ier & SDHCI_INT_CARD_INT)) { sdhci_enable_sdio_irq_nolock(host, false); host->thread_isr |= SDHCI_INT_CARD_INT; result = IRQ_WAKE_THREAD; |