Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933650AbbHLJK0 (ORCPT ); Wed, 12 Aug 2015 05:10:26 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:60973 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964900AbbHLI6d (ORCPT ); Wed, 12 Aug 2015 04:58:33 -0400 From: Luis Henriques To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Kishon Vijay Abraham I , Vignesh R , Ulf Hansson , Luis Henriques Subject: [PATCH 3.16.y-ckt 102/118] mmc: omap_hsmmc: Fix DTO and DCRC handling Date: Wed, 12 Aug 2015 09:56:44 +0100 Message-Id: <1439369820-27005-103-git-send-email-luis.henriques@canonical.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1439369820-27005-1-git-send-email-luis.henriques@canonical.com> References: <1439369820-27005-1-git-send-email-luis.henriques@canonical.com> X-Extended-Stable: 3.16 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2411 Lines: 63 3.16.7-ckt16 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Kishon Vijay Abraham I commit 408806f740497c5d71f9c305b3d6aad260ff186d upstream. DTO/DCRC errors were not being informed to the mmc core since commit ae4bf788ee9b ("mmc: omap_hsmmc: consolidate error report handling of HSMMC IRQ"). This commit made sure 'end_trans' is never set on DTO/DCRC errors. This is because after this commit 'host->data' is checked after it has been cleared to NULL by omap_hsmmc_dma_cleanup(). Because 'end_trans' is never set, omap_hsmmc_xfer_done() is never invoked making core layer not to be aware of DTO/DCRC errors. Because of this any command invoked after DTO/DCRC error leads to a hang. Fix this by checking for 'host->data' before it is actually cleared. Fixes: ae4bf788ee9b ("mmc: omap_hsmmc: consolidate error report handling of HSMMC IRQ") Signed-off-by: Kishon Vijay Abraham I Signed-off-by: Vignesh R Tested-by: Andreas Fenkart Signed-off-by: Ulf Hansson Signed-off-by: Luis Henriques --- drivers/mmc/host/omap_hsmmc.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c index 6c70a01b5c15..d4368603e67a 100644 --- a/drivers/mmc/host/omap_hsmmc.c +++ b/drivers/mmc/host/omap_hsmmc.c @@ -1079,6 +1079,10 @@ static void omap_hsmmc_do_irq(struct omap_hsmmc_host *host, int status) if (status & (CTO_EN | CCRC_EN)) end_cmd = 1; + if (host->data || host->response_busy) { + end_trans = !end_cmd; + host->response_busy = 0; + } if (status & (CTO_EN | DTO_EN)) hsmmc_command_incomplete(host, -ETIMEDOUT, end_cmd); else if (status & (CCRC_EN | DCRC_EN)) @@ -1098,10 +1102,6 @@ static void omap_hsmmc_do_irq(struct omap_hsmmc_host *host, int status) } dev_dbg(mmc_dev(host->mmc), "AC12 err: 0x%x\n", ac12); } - if (host->data || host->response_busy) { - end_trans = !end_cmd; - host->response_busy = 0; - } } OMAP_HSMMC_WRITE(host->base, STAT, status); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/