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Received: from mout.kundenserver.de ([212.227.126.133]) by merlin.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gLwHs-0001ek-LE for linux-arm-kernel@lists.infradead.org; Sun, 11 Nov 2018 20:24:54 +0000 Received: from localhost.localdomain ([37.4.249.153]) by mrelayeu.kundenserver.de (mreue012 [212.227.15.167]) with ESMTPSA (Nemesis) id 1MFsAJ-1gHIdF11od-00HRC9; Sun, 11 Nov 2018 21:24:30 +0100 From: Stefan Wahren To: Eric Anholt , Florian Fainelli , Ulf Hansson Subject: [PATCH V2 1/7] mmc: bcm2835: reset host on timeout Date: Sun, 11 Nov 2018 21:23:53 +0100 Message-Id: <1541967839-2847-2-git-send-email-stefan.wahren@i2se.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1541967839-2847-1-git-send-email-stefan.wahren@i2se.com> References: <1541967839-2847-1-git-send-email-stefan.wahren@i2se.com> X-Provags-ID: V03:K1:9dCj+NxEXMy8FYSWT087C0qWiWpuXnUKaE9LFDImT+erQJJaYfQ afhviGlaCUee+hC7LRqA9GKull3648mAUgO52xY3aMreroZB/2XIIIzronlCdQd6pYX6dOA KBBYxlcz7woae/QQ5I2sTNZuW3qu9oJaiBC6nL0tpFXoKyJYwAy5XGSV5rVZdzeGjDCjR2K nxD304MaNXMWrp5ReQQLQ== X-UI-Out-Filterresults: notjunk:1;V01:K0:pUQrv0nromk=:j9gizncvy8GfWdNJFcRfWj bO9nPfr7BSmAouq0vikpqgHvHFC76FvoBIZwzQ/6yPYaNN+0VVLe4ogV1CmSqE1oolnskVJb/ CpMr3K21XVMuHQfpFYZLrW+KpeNZt2e/2vL/C4C70Frij1Zywt9HHJA5FyrBT5ojnRDA1+dJb v077BsWViC1w/SJLN11CJO4UBehS1Xa8564+HwJDDs5PZV1JcXa2inYx5xQxTbqBY7scOI5mJ YunT0hSlKj172nnKPxqkgktSfCOZ01/yeqQocznS2MLZ8T4O8bd4GXx5qSzImnO/gRmgFu5Pu OfLaxtJU3IcQwSZ7/3uCx/DveeXMCspaHm1rq8G/rOnIvHfiApbIilUoBuGon784I2Gqz5WEP zjMA3kHnGgA/H1C7hm+eba4xbkjT7jCqGbmRY4TnE+cKRX9i3op9MstsCW3VAKBMUg7klCeSW Z8WO+/kYY3jKJ8K7C8kQygOdcz64E8wSyHGyp3FtukWLuEw+j4MLyxBaPKJ/4/bBnnvKgbKnn dh0aCOnrEkoFygCYevcFi3FF3Z4aCqSmZ9uK8PX6rvZck2xP0t/Yamo1HhwE6e/R//TTq/3pw motW+JR8+YF514cM6Cm0P+TZAAdmsFlrS2n0jLKn6+8yhlC3zgZMfhk/HTQaieFkPEn2rWPZn 9mHVsTHprDsVqzVIsKnlA1Nud+0HEv1lwGc3NsX354n3uokuoUOkLaNcGYxOuIiMcgd4dpgTB 81uR39eHejOKAz7Edmkt/pXsynsTZ4RHZnIk+0cNaEGMnwTvk5mkyzLinlOujzRDHhQuPxvHl EVobjFm/bi0KjZwfqDn7hi51gnWnA== X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181111_152452_934169_863500CC X-CRM114-Status: GOOD ( 13.44 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Stefan Wahren , Phil Elwell , linux-mmc@vger.kernel.org, linux-rpi-kernel@lists.infradead.org, Michal Suchanek , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Michal Suchanek The bcm2835 mmc host tends to lock up for unknown reason so reset it on timeout. The upper mmc block layer tries retransimitting with single blocks which tends to work out after a long wait. This is better than giving up and leaving the machine broken for no obvious reason. Fixes: 660fc733bd74 ("mmc: bcm2835: Add new driver for the sdhost controller.") Signed-off-by: Michal Suchanek Signed-off-by: Stefan Wahren --- drivers/mmc/host/bcm2835.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/mmc/host/bcm2835.c b/drivers/mmc/host/bcm2835.c index 768972a..f1712df 100644 --- a/drivers/mmc/host/bcm2835.c +++ b/drivers/mmc/host/bcm2835.c @@ -286,6 +286,7 @@ static void bcm2835_reset(struct mmc_host *mmc) if (host->dma_chan) dmaengine_terminate_sync(host->dma_chan); + host->dma_chan = NULL; bcm2835_reset_internal(host); } @@ -837,6 +838,8 @@ static void bcm2835_timeout(struct work_struct *work) dev_err(dev, "timeout waiting for hardware interrupt.\n"); bcm2835_dumpregs(host); + bcm2835_reset(host->mmc); + if (host->data) { host->data->error = -ETIMEDOUT; bcm2835_finish_data(host);