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Sat, 19 Dec 2020 15:51:27 +0900 (KST) Received: from ubuntu.dsn.sec.samsung.com (unknown [12.36.155.120]) by epsmtip2.samsung.com (KnoxPortal) with ESMTPA id 20201219065126epsmtip22fa3a4b07ae1ada03895dd50eb82a8f0~SC4XicF4F1141511415epsmtip2d; Sat, 19 Dec 2020 06:51:26 +0000 (GMT) From: Kiwoong Kim To: linux-scsi@vger.kernel.org, alim.akhtar@samsung.com, avri.altman@wdc.com, jejb@linux.ibm.com, martin.petersen@oracle.com, beanhuo@micron.com, asutoshd@codeaurora.org, cang@codeaurora.org, bvanassche@acm.org, grant.jung@samsung.com, sc.suh@samsung.com, hy50.seo@samsung.com, sh425.lee@samsung.com, bhoon95.kim@samsung.com Cc: Kiwoong Kim Subject: [RFC PATCH v1] ufs: relocate flush of exceptional event Date: Sat, 19 Dec 2020 15:40:39 +0900 Message-Id: <1608360039-16390-1-git-send-email-kwmad.kim@samsung.com> X-Mailer: git-send-email 2.7.4 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFupgk+LIzCtJLcpLzFFi42LZdljTVPfDorvxBscPq1k8mLeNzWJv2wl2 i5c/r7JZHHzYyWLxdekzVotpH34yW3xav4zV4tff9ewWqxc/YLFYdGMbk8XNLUdZLLqv72Cz WH78H5NF190bjBZL/71lceD3uHzF2+NyXy+Tx4RFBxg9vq/vYPP4+PQWi0ffllWMHp83yXm0 H+hmCuCIyrHJSE1MSS1SSM1Lzk/JzEu3VfIOjneONzUzMNQ1tLQwV1LIS8xNtVVy8QnQdcvM ATpeSaEsMacUKBSQWFyspG9nU5RfWpKqkJFfXGKrlFqQklNgaFigV5yYW1yal66XnJ9rZWhg YGQKVJmQk7Fv92Pmgv+cFU1XHjA2MPZydDFyckgImEhcX7GFsYuRi0NIYAejxMn2x0wQzidG iZuPr7BAOJ8ZJW50v2aBaTlwaAE7RGIXo0TrvalQLT8YJX5uOsoKUsUmoCnx9CZEQkTgDJPE tdazYAlmAXWJXRNOMIHYwgIOEpvWzAWzWQRUJQ62HGADsXkFXCX+P+5jglgnJ3HzXCczyCAJ gUYOibP9LewQCReJfQfvM0PYwhKvjm+BiktJfH63lw3CrpfYN7WBFaK5h1Hi6b5/jBAJY4lZ z9qBbA6gizQl1u/SBzElBJQljtxigbiTT6Lj8F92iDCvREebEESjssSvSZOhhkhKzLx5B2qr h8TBT1PB4kICsRLXb59jmcAoOwth/gJGxlWMYqkFxbnpqcVGBcbI0bSJEZwktdx3MM54+0Hv ECMTB+MhRgkOZiUR3tAHt+OFeFMSK6tSi/Lji0pzUosPMZoCw2sis5Rocj4wTeeVxBuaGpmZ GViaWpiaGVkoifOGruyLFxJITyxJzU5NLUgtgulj4uCUamDKdYoItze+cb5W4aarured8PY5 csUdBYu5QgsSPny/8rduPW/rzTcSs9QFzh69qiD2cMIPu++vJszuf8x3ZuuPwsebfJ9vPvr4 0Oe4ZplPVv+e8ks0Sme0W/fcLk1yOz3zfyxfdMYMraeGnxbd7NP8qSKzmS8wumGf3ea1P6W3 6q82sGW0Zbm9f1bsigiji6cT0/v8/1+Su/86hS1hy8cp3xM3WXj96eLL5f2RsDW9749GXqM9 RyDPZyPBw3/bnj445/pydYhtyMG56/feX/jmWPO8vV++90ezJcwUCmF8LvR2+QUpn/1TalhU Tef5ucdy8/vu9M2/uDHh8um8M0Z3nr2dvme3elm57rujS/TnKLEUZyQaajEXFScCACBULYkb BAAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrGLMWRmVeSWpSXmKPExsWy7bCSvO77RXfjDW60qlk8mLeNzWJv2wl2 i5c/r7JZHHzYyWLxdekzVotpH34yW3xav4zV4tff9ewWqxc/YLFYdGMbk8XNLUdZLLqv72Cz WH78H5NF190bjBZL/71lceD3uHzF2+NyXy+Tx4RFBxg9vq/vYPP4+PQWi0ffllWMHp83yXm0 H+hmCuCI4rJJSc3JLEst0rdL4MrYt/sxc8F/zoqmKw8YGxh7OboYOTkkBEwkDhxawN7FyMUh JLCDUWLN++lMEAlJiRM7nzNC2MIS91uOsEIUfWOUaH36kAUkwSagKfH05lQmkISIwD0miUsT 5jKDJJgF1CV2TTgBNklYwEFi05q5YDaLgKrEwZYDbCA2r4CrxP/HfVDb5CRunutknsDIs4CR YRWjZGpBcW56brFhgVFearlecWJucWleul5yfu4mRnDQamntYNyz6oPeIUYmDsZDjBIczEoi vKEPbscL8aYkVlalFuXHF5XmpBYfYpTmYFES573QdTJeSCA9sSQ1OzW1ILUIJsvEwSnVwJSy 3/78ofmeNk6Fp1acy+j61riq7KRz3/+5TJllT8p/i/CwRddeTrj0YMtZo7Wl+1eUlCY9KdL+ +iNohe6RWa5L1szt3fmZb/vqf3PbF5wV2v6LnZ/Z8Lr5e91tPAfMPm6tOn5DKexTtbHMbY4V tzK+KLT+7q78sij87LqCSs0bZwJbd5kJFmV73PVNCZ0s/Gv2wV9mIjKaG3jqWzKuzW79FPE6 1vpe3I/AyDmJBxPln5nFlGRXpYtOzbsZ9/xu0tKqvHuzqtepzXS311WMDJiyY9H9nEzhRsEX FpsmbRYUtLk/kXtqNssEp4OiZTdTL+62efj+4UM9dtGdM3Z5xzk36F1mqOxc/Wjrm84pja5K LMUZiYZazEXFiQDSQij5yQIAAA== X-CMS-MailID: 20201219065127epcas2p4ee350f78ba75619dfd502dbb2e694a9b X-Msg-Generator: CA X-Sendblock-Type: AUTO_CONFIDENTIAL CMS-TYPE: 102P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20201219065127epcas2p4ee350f78ba75619dfd502dbb2e694a9b References: Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org I found one case as follows and the current flush location doesn't guarantee disabling BKOPS in the case of requsting device power off. 1) The exceptional event handler is queued. 2) ufs suspend starts with a request of device power off 3) BKOPS is disabled in ufs suspend 4) The queued work for the handler is done and BKOPS is enabled again. Signed-off-by: Kiwoong Kim Reviewed-by: Can Guo Reviewed-by: Stanley Chu --- drivers/scsi/ufs/ufshcd.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 92d433d..414025c 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -8608,6 +8608,8 @@ static int ufshcd_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) ufshcd_wb_need_flush(hba)); } + flush_work(&hba->eeh_work); + if (req_dev_pwr_mode != hba->curr_dev_pwr_mode) { if ((ufshcd_is_runtime_pm(pm_op) && !hba->auto_bkops_enabled) || !ufshcd_is_runtime_pm(pm_op)) { @@ -8622,8 +8624,6 @@ static int ufshcd_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) } } - flush_work(&hba->eeh_work); - /* * In the case of DeepSleep, the device is expected to remain powered * with the link off, so do not check for bkops.