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Tue, 15 Mar 2022 18:57:17 +0900 (KST) Received: from epsmtrp1.samsung.com (unknown [182.195.40.13]) by epcas2p2.samsung.com (KnoxPortal) with ESMTPA id 20220315095716epcas2p2ec52c66863b71180a6c2c45856058683~chWX7Bv550452404524epcas2p2F; Tue, 15 Mar 2022 09:57:16 +0000 (GMT) Received: from epsmgms1p2.samsung.com (unknown [182.195.42.42]) by epsmtrp1.samsung.com (KnoxPortal) with ESMTP id 20220315095716epsmtrp1e1fe9f4d9d85366daa36972679b7aad5~chWX6HqVa1158911589epsmtrp1T; Tue, 15 Mar 2022 09:57:16 +0000 (GMT) X-AuditID: b6c32a46-bffff70000023ea8-38-623062fd68ae Received: from epsmtip2.samsung.com ( [182.195.34.31]) by epsmgms1p2.samsung.com (Symantec Messaging Gateway) with SMTP id 31.9D.03370.CF260326; Tue, 15 Mar 2022 18:57:16 +0900 (KST) Received: from ubuntu.dsn.sec.samsung.com (unknown [12.36.155.120]) by epsmtip2.samsung.com (KnoxPortal) with ESMTPA id 20220315095716epsmtip29d8bd28845a2e47d2552acf27faad352~chWXt7gJ01295012950epsmtip2k; Tue, 15 Mar 2022 09:57:16 +0000 (GMT) From: Kiwoong Kim To: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, alim.akhtar@samsung.com, avri.altman@wdc.com, jejb@linux.ibm.com, martin.petersen@oracle.com, beanhuo@micron.com, cang@codeaurora.org, adrian.hunter@intel.com, sc.suh@samsung.com, hy50.seo@samsung.com, sh425.lee@samsung.com, bhoon95.kim@samsung.com, vkumar.1997@samsung.com Cc: Kiwoong Kim Subject: [RESEND PATCH v3] scsi: ufs: exclude UECxx from SFR dump list Date: Tue, 15 Mar 2022 18:56:02 +0900 Message-Id: <1647338162-75639-1-git-send-email-kwmad.kim@samsung.com> X-Mailer: git-send-email 2.7.4 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFmplk+LIzCtJLcpLzFFi42LZdljTTPdvkkGSwZzf/BYnn6xhs3gwbxub xcufV9ksDj7sZLH4uvQZq8Wn9ctYLVYvfsBisejGNiaLm1uOslhc3jWHzaL7+g42i+XH/zFZ dN29wWix9N9bFos79z+yOPB7XO7rZfJYvOclk8eERQcYPb6v72Dz+Pj0FotH35ZVjB6fN8l5 tB/oZgrgiMq2yUhNTEktUkjNS85PycxLt1XyDo53jjc1MzDUNbS0MFdSyEvMTbVVcvEJ0HXL zAG6XkmhLDGnFCgUkFhcrKRvZ1OUX1qSqpCRX1xiq5RakJJTYF6gV5yYW1yal66Xl1piZWhg YGQKVJiQnTFp9kr2gjaeir835rE1MJ7h7GLk5JAQMJG4fvgHexcjF4eQwA5GiVNrP0I5nxgl vpx7zwrhfGaU2L6imw2m5cWF1ywQiV2MEtse/2GEcH4wSrQ1nGAGqWIT0JR4enMqE4gtInCd SWLe9gwQm1lAXWLXhBNgcWEBN4kNc5rBprIIqEocPzofaCoHB6+Aq0TT7CCIZXISN891MoPM lxBo5ZDYdH4LK0TCRWJP50FGCFtY4tXxLewQtpTEy/42dpA5EgLFEpv2yUP0NjBKLPm0mQWi xlhi1rN2RpAaZqA71+/ShyhXljhyiwXiSj6JjsN/oabwSnS0CUE0Kkv8mjQZaqmkxMybd6CW eki82/Mb7HEhgViJB2svME9glJ2FMH8BI+MqRrHUguLc9NRiowIjeBwl5+duYgSnRy23HYxT 3n7QO8TIxMF4iFGCg1lJhPfMC/0kId6UxMqq1KL8+KLSnNTiQ4ymwNCayCwlmpwPTNB5JfGG JpYGJmZmhuZGpgbmSuK8XikbEoUE0hNLUrNTUwtSi2D6mDg4pRqYbmvMFLq9dfOjDSxHL558 d/uvhf/TGRz+2qr3tLRfLhaYG3xS/u+zpplVkpcdj/ol3NwhYR1mG+J35nfv1KUn793ace9W EtPi+/Y/pJIrtgTfWK2SvJ79qdgS+R/HA6PWXOOalPNWaZlPffG9t3E1cbfOCEmnOefWrL9a slku9cUXTran9rZKph8Pn/1RdLLr3+8Z9/5/uK16TawgP3Yjf+af8Cf1Bz5MMmGqXpjzk2Gt tNv3N+tnBJ6SUP4073uU/E+Txq9b7TLzEzO4ZcQn9zXf0tkf2rwr4F65RnyVr1zgUr+zJk/F Ji2wkPnUIrc2ZI2xY1r5DrPi1lyR0xONC2t2Nf6JdEgwftjg9HpBkRJLcUaioRZzUXEiAAau x84YBAAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrKLMWRmVeSWpSXmKPExsWy7bCSvO6fJIMkg38rNCxOPlnDZvFg3jY2 i5c/r7JZHHzYyWLxdekzVotP65exWqxe/IDFYtGNbUwWN7ccZbG4vGsOm0X39R1sFsuP/2Oy 6Lp7g9Fi6b+3LBZ37n9kceD3uNzXy+SxeM9LJo8Jiw4wenxf38Hm8fHpLRaPvi2rGD0+b5Lz aD/QzRTAEcVlk5Kak1mWWqRvl8CVMWn2SvaCNp6KvzfmsTUwnuHsYuTkkBAwkXhx4TULiC0k sINRonthOURcUuLEzueMELawxP2WI6xdjFxANd8YJdqf32QHSbAJaEo8vTmVCSQhIvCSSeLF nDVsIAlmAXWJXRNOMIHYwgJuEhvmNIPFWQRUJY4fnQ+0jYODV8BVoml2EMQCOYmb5zqZJzDy LGBkWMUomVpQnJueW2xYYJSXWq5XnJhbXJqXrpecn7uJERyyWlo7GPes+qB3iJGJg/EQowQH s5II75kX+klCvCmJlVWpRfnxRaU5qcWHGKU5WJTEeS90nYwXEkhPLEnNTk0tSC2CyTJxcEo1 MHEnJoYcFdnAvDb+2MMDyWHNBWwykxr2n1hVftZbPCxxgcui6X4zj2ue+3zrlMZj+7fZ36qO XYy2Ut32627Cbo7epO8Mt68KbBVpd084svbC2pmNnk333NO25pa/eaSbeSF0SQSzWJJVhnhs o+CPZXsS5Z65qB7b9L6ke2bvzJRw+XMTt602nvy0Uv3s9TsfivQ+eU5Yt/ZMEXNk95upUsEL 1mbOCny4MD2Uxbr/Yo+u9SGO9X88fz/6+eTex1dbNu76FLCv/PBOuVX/X7uJrGU1TDRdtJFd 8AjjGfOfjp9Uec543f48vzxH5+Pm5XKNk165rjQon7alOOBrscZu+TmyUz1TrXf6i8n3GDts 3HtaiaU4I9FQi7moOBEAJSaXdMgCAAA= X-CMS-MailID: 20220315095716epcas2p2ec52c66863b71180a6c2c45856058683 X-Msg-Generator: CA X-Sendblock-Type: AUTO_CONFIDENTIAL CMS-TYPE: 102P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20220315095716epcas2p2ec52c66863b71180a6c2c45856058683 References: Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org v2 -> v3: add fixes v1 -> v2: does skipping only for zero offset These are ROC type things that means their values are cleared when the SFRs are read. They are usually read in ISR when an UIC error occur. Thus, their values would be zero at many cases. And there might be a little bit risky when they are read to be cleared before the ISR reads them, e.g. the case that a command is timed-out, ufshcd_dump_regs is called in ufshcd_abort and an UIC error occurs at the nearly same time. In this case, ISR will be called but UFS error handler will not be scheduled. This patch is to make UFS driver not read those SFRs in the dump function, i.e. ufshcd_dump_regs. Fixes: d67247566450 ("scsi: ufs: Use explicit access size in ufshcd_dump_regs") Signed-off-by: Kiwoong Kim --- drivers/scsi/ufs/ufshcd.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 460d2b4..7f2a1ed 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -115,8 +115,13 @@ int ufshcd_dump_regs(struct ufs_hba *hba, size_t offset, size_t len, if (!regs) return -ENOMEM; - for (pos = 0; pos < len; pos += 4) + for (pos = 0; pos < len; pos += 4) { + if (offset == 0 && + pos >= REG_UIC_ERROR_CODE_PHY_ADAPTER_LAYER && + pos <= REG_UIC_ERROR_CODE_DME) + continue; regs[pos / 4] = ufshcd_readl(hba, offset + pos); + } ufshcd_hex_dump(prefix, regs, len); kfree(regs);