From: <gregkh@linuxfoundation.org>
To: krisman@collabora.co.uk, adrian.hunter@intel.com,
gregkh@linuxfoundation.org, ulf.hansson@linaro.org
Cc: <stable@vger.kernel.org>, <stable-commits@vger.kernel.org>
Subject: Patch "mmc: sdhci: Ignore unexpected CARD_INT interrupts" has been added to the 4.4-stable tree
Date: Sat, 04 Feb 2017 14:12:37 +0100 [thread overview]
Message-ID: <1486213957239203@kroah.com> (raw)
This is a note to let you know that I've just added the patch titled
mmc: sdhci: Ignore unexpected CARD_INT interrupts
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mmc-sdhci-ignore-unexpected-card_int-interrupts.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From 161e6d44a5e2d3f85365cb717d60e363171b39e6 Mon Sep 17 00:00:00 2001
From: Gabriel Krisman Bertazi <krisman@collabora.co.uk>
Date: Mon, 16 Jan 2017 12:23:42 -0200
Subject: mmc: sdhci: Ignore unexpected CARD_INT interrupts
From: Gabriel Krisman Bertazi <krisman@collabora.co.uk>
commit 161e6d44a5e2d3f85365cb717d60e363171b39e6 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/mmc/host/sdhci.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -2629,7 +2629,8 @@ static irqreturn_t sdhci_irq(int irq, vo
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;
Patches currently in stable-queue which might be from krisman@collabora.co.uk are
queue-4.4/mmc-sdhci-ignore-unexpected-card_int-interrupts.patch
reply other threads:[~2017-02-04 13:12 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1486213957239203@kroah.com \
--to=gregkh@linuxfoundation.org \
--cc=adrian.hunter@intel.com \
--cc=krisman@collabora.co.uk \
--cc=stable-commits@vger.kernel.org \
--cc=stable@vger.kernel.org \
--cc=ulf.hansson@linaro.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).