diff options
| author | Gabriel Krisman Bertazi <krisman@collabora.co.uk> | 2017-01-16 12:23:42 -0200 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@verizon.com> | 2017-03-06 17:31:12 -0500 |
| commit | 564edd8f73327e7c83c6cc40486faeeb76e323c1 (patch) | |
| tree | a36e8c1fc7d7ac73336dd83c0618c1d6a8fa076d | |
| parent | 1f7c5e4f3659464f218067b7c2a637905fac384e (diff) | |
mmc: sdhci: Ignore unexpected CARD_INT interrupts
[ Upstream commit 161e6d44a5e2d3f85365cb717d60e363171b39e6 ]
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>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
| -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 fdc44c8200ba..84e3f7a43f47 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -2650,7 +2650,8 @@ static irqreturn_t sdhci_irq(int irq, void *dev_id) pr_err("%s: Card is consuming too much power!\n", mmc_hostname(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; |