{"id":807024,"url":"http://patchwork.ozlabs.org/api/1.0/covers/807024/?format=json","project":{"id":3,"url":"http://patchwork.ozlabs.org/api/1.0/projects/3/?format=json","name":"Linux MTD development","link_name":"linux-mtd","list_id":"linux-mtd.lists.infradead.org","list_email":"linux-mtd@lists.infradead.org","web_url":null,"scm_url":null,"webscm_url":null},"msgid":"<1504001833-18097-1-git-send-email-LW@KARO-electronics.de>","date":"2017-08-29T10:17:11","name":"[0/2] mtd: nand: fix regression introduced by splitting off manufacturer dependent code","submitter":{"id":2554,"url":"http://patchwork.ozlabs.org/api/1.0/people/2554/?format=json","name":"Lothar Waßmann","email":"LW@KARO-electronics.de"},"series":[{"id":341,"url":"http://patchwork.ozlabs.org/api/1.0/series/341/?format=json","date":"2017-08-29T10:17:11","name":"mtd: nand: fix regression introduced by splitting off manufacturer dependent code","version":1,"mbox":"http://patchwork.ozlabs.org/series/341/mbox/"}],"headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@bilbo.ozlabs.org","Authentication-Results":["ozlabs.org; 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charset=\"us-ascii\"","Content-Transfer-Encoding":"7bit","Sender":"\"linux-mtd\" ","Errors-To":"linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org"},"content":"commit c51d0ac59f24 (\"mtd: nand: Move Samsung specific init/detection\nlogic in nand_samsung.c\") introduced a regression for Samsung SLC NAND\nchips by skipping the initialization of chip->bits_per_cell that is\ndone in nand_decode_ext_id() from which the manufacturer dependent\ncode was extracted.\nThe regression should also affect Hynix and Macronix chips whose code\nwas separated out in further commits but which I cannot test.\nAMD/Spansion and Toshiba NAND are not affected, since they are calling \nnand_decode_ext_id() (which initializes bhip->bits_per_cell) in their\n.detect function.\n\nFix the regression and add a warning to nand_is_slc() to prevent\nfurther regressions of this kind."}