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Thu, 25 Feb 2021 07:43:09 +0000 (GMT) From: "DooHyun Hwang" To: , , , , , , , Cc: , , , , , , , In-Reply-To: <20210210045936.7809-1-dh0421.hwang@samsung.com> Subject: RE: [PATCH] mmc: core: add a power cycle when CMD11 fails Date: Thu, 25 Feb 2021 16:43:09 +0900 Message-ID: <000001d70b49$dca136f0$95e3a4d0$@samsung.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Outlook 16.0 Thread-Index: AQGOblsIe7vdZk8c0sfi2jsUpFOvKwL6qeaxquHfBCA= Content-Language: ko X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrKJsWRmVeSWpSXmKPExsWy7bCmni5fqHmCwaK1nBYzTrWxWlxc3cJq 8evvenaLjq2TmSx2PD/DbrHrbzOTxZQ/y5ksLu+aw2Zx5H8/o8WRA44W/avvslk0/dnHYnHt zAlWi+Nrwy02X/rGYtF3zt1BwGPBplKPO9f2sHn0bVnF6PFs4XoWj6c/9jJ7fN4kF8AWlWOT kZqYklqkkJqXnJ+SmZduq+QdHO8cb2pmYKhraGlhrqSQl5ibaqvk4hOg65aZA3S0kkJZYk4p UCggsbhYSd/Opii/tCRVISO/uMRWKbUgJafA0KBArzgxt7g0L10vOT/XytDAwMgUqDIhJ2Pb g/3MBd1sFec+PWRrYPzI0sXIySEhYCKx8N9Hti5GLg4hgR2MEq37D7FDOJ8YJbZvm8AE4Xxm lNi7/SQbTMvFXRMYQWwhgV2MEqt+qkAUvWaU+Hx1BliCTcBAYvKxN2BzRQQeM0rMmz2ZGcRh FrjOKPHz3heguRwcnAK2EtOWZYM0CAs4SVz/3MMKEmYRUJXob8kECfMKWEp0bdvECGELSpyc +QTsbmYBeYntb+cwQxykIPHz6TJWEFtEwEpi0eQ97BA1IhKzO9vA1koI3OGQuLTtADtEg4tE 8879UM3CEq+Ob4GKS0m87G+DsrsZJfoP2UE0T2CUuHy8B+p9Y4lPnz8zghzKLKApsX6XPkRY UWLn77mMEIv5JN59hfhFQoBXoqNNCKJETWLxv+9AJexAtoxEI/cERqVZSB6bheSxWUgemIWw agEjyypGsdSC4tz01GLDAhPkuN7ECE7PWhY7GOe+/aB3iJGJg/EQowQHs5II7+Z/pglCvCmJ lVWpRfnxRaU5qcWHGE2BIT2RWUo0OR+YIfJK4g1NjYyNjS1MzMzNTI2VxHmTDB7ECwmkJ5ak ZqemFqQWwfQxcXBKNTBp/d8z6clZ54jAfrvmvLdPmSQLkh036Pt6dnbmtD19vbhw2RyX1wrt jzX23PVUe86UYXXz1FE3ly0bVz9jFn4RwtZ39BTnu71TNTSX7ctNt86dN/8a7xYG11aX17NL 9MSkJt7wSey6eG+GzyJV7t3x7JNZ9u3oneo2Saf0TJKR2/n1DFq+VqzHb+3ayh16kp+V47FF xYbc3zM9NoW7zlhc8nKd9lbBeSe3H7DqC5Q4sqK0OOPConzVLU0n15aqn5d79+xl3vcstQ/6 fipn93oy5Bn9f/BvS2XS745L1WHZi08vjDIUCJ1WxhLgo8rOMTPKxi26XWBt2W72d4fbMm68 u5/54olh3HR1p59m/dOUWIozEg21mIuKEwHqFZ7YWAQAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrAIsWRmVeSWpSXmKPExsWy7bCSnC5vqHmCwfvXYhYzTrWxWlxc3cJq 8evvenaLjq2TmSx2PD/DbrHrbzOTxZQ/y5ksLu+aw2Zx5H8/o8WRA44W/avvslk0/dnHYnHt zAlWi+Nrwy02X/rGYtF3zt1BwGPBplKPO9f2sHn0bVnF6PFs4XoWj6c/9jJ7fN4kF8AWxWWT kpqTWZZapG+XwJWx7cF+5oJutopznx6yNTB+ZOli5OSQEDCRuLhrAmMXIxeHkMAORonzS3az QSRkJLrv72XvYuQAsoUlDh8uhqh5ySjxcPlpZpAaNgEDicnH3oDViwi8ZpQ4uy0XpIhZ4D6j xKJtU9khOvoYJY5+XAw2iVPAVmLasmyQBmEBJ4nrn3tYQcIsAqoS/S2ZIGFeAUuJrm2bGCFs QYmTM5+AHcosoC3x9OZTKFteYvvbOcwQdypI/Hy6jBXiBiuJRZP3sEPUiEjM7mxjnsAoPAvJ qFlIRs1CMmoWkpYFjCyrGCVTC4pz03OLDQuM8lLL9YoTc4tL89L1kvNzNzGCI1VLawfjnlUf 9A4xMnEwHmKU4GBWEuHd/M80QYg3JbGyKrUoP76oNCe1+BCjNAeLkjjvha6T8UIC6Yklqdmp qQWpRTBZJg5OqQamHaeDi+8YzL0Wr1vunZXltJY/xbku8t+c298v5k4uv81wvm9ppNfRk7Le muv0a1RzH7nbnjrvoxJ04lPHt5V7FrfJ7tOYHWP58ZDjsoibey/pnxJoMt1Uuev7pSdnwzUf PE48y+J24KXyVJYrr53Zog8s/KBmfHKFV8PhBqXtzVk/bj4tll03/8OVxO/bTE0eRZYeXciT s1yxrtRY4oS36vv/FnLH6/RCjK/N02x0nr2hKoN1/aLiyum2CteFGR+vufPn25sv7W9n3zUP eyO694RVkpjLaZeWj43OzPLSX1RX2kbJ6af+M7jZahwzKShO3zPeZmsh+09zT7X4axu9O/i4 ub52H5ixYFeVwVYNJZbijERDLeai4kQAc1wt3kMDAAA= X-CMS-MailID: 20210225074309epcas1p2ed4a8c8961ca1e78321be678ea2014c4 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-Sendblock-Type: SVC_REQ_APPROVE CMS-TYPE: 101P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20210210051209epcas1p3e55c0cbab7313731bc6e425da6189bb4 References: <20210210045936.7809-1-dh0421.hwang@samsung.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Dear Maintainers and commiters. Please review this patch for updating. Thanks and regards. DooHyun Hwang. On 17/02/10 4:59 am, DooHyun Hwang wrote: >Subject: [PATCH] mmc: core: add a power cycle when CMD11 fails > >A power cycle is required if CMD11 fails. >CMD11 failure should be handled as no response. > >If there is a timeout error that means no response to the CMD11, do not >send the CMD11 again and the power cycle is required. >Any other errors for CMD11 are the same because CMD11 failed. > >On some bad SD Card, CMD11 may fail but the card may have already invoked >the voltage switch sequence. >In this case, it is necessary to retry without voltage switching after >power cycle. > >Signed-off-by: DooHyun Hwang