From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:40508 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750881AbdBDNMn (ORCPT ); Sat, 4 Feb 2017 08:12:43 -0500 Subject: Patch "mmc: sdhci: Ignore unexpected CARD_INT interrupts" has been added to the 4.4-stable tree To: krisman@collabora.co.uk, adrian.hunter@intel.com, gregkh@linuxfoundation.org, ulf.hansson@linaro.org Cc: , From: Date: Sat, 04 Feb 2017 14:12:37 +0100 Message-ID: <1486213957239203@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: 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 know about it. >>From 161e6d44a5e2d3f85365cb717d60e363171b39e6 Mon Sep 17 00:00:00 2001 From: Gabriel Krisman Bertazi Date: Mon, 16 Jan 2017 12:23:42 -0200 Subject: mmc: sdhci: Ignore unexpected CARD_INT interrupts From: Gabriel Krisman Bertazi 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 Signed-off-by: Gabriel Krisman Bertazi Acked-by: Adrian Hunter Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman --- 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