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J . Bottomley" , "Martin K . Petersen" Cc: Alim Akhtar , Avri Altman , Bart Van Assche , Minwoo Im , gost.dev@samsung.com, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, Jeuk Kim Subject: [PATCH 3/3] ufs: mcq: Prevent no I/O queue case for MCQ Date: Fri, 31 May 2024 19:38:21 +0900 Message-Id: <20240531103821.1583934-4-minwoo.im@samsung.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240531103821.1583934-1-minwoo.im@samsung.com> Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprHJsWRmVeSWpSXmKPExsWy7bCmma7P6sg0g57J0hYP5m1js3j58yqb xbQPP5ktbh7YyWSxsZ/D4v7Wa4wWl3fNYbPovr6DzWL58X9MFs9OH2B24PK4fMXbY9qkU2we H5/eYvHo27KK0ePzJjmP9gPdTAFsUdk2GamJKalFCql5yfkpmXnptkrewfHO8aZmBoa6hpYW 5koKeYm5qbZKLj4Bum6ZOUCHKSmUJeaUAoUCEouLlfTtbIryS0tSFTLyi0tslVILUnIKzAv0 ihNzi0vz0vXyUkusDA0MjEyBChOyM25N3sRU0MRZ8ePFLKYGxlXsXYycHBICJhJ9dy+xdjFy cQgJ7GCU6OluZ4FwPjFKHO5pZYJzVk98yAjT8mvTTKiWnYwSG2fPYoRwfjNKXF/6kwmkik1A XaJh6isWEFtEoFpic/tfNpAiZoE+Jon22fNZQRLCAg4Sp94tZwaxWQRUJRbevwTWwCtgIzFt z3kWiHXyEvsPngWr4RSwlWj5f5INokZQ4uTMJ2A1zEA1zVtnM4MskBD4yi6xfe1cqGYXiWct 25ghbGGJV8e3QL0tJfH53V42CLtc4uebSVC/VUgcnHUbKM4BZNtLXHueAmIyC2hKrN+lDxFV ljhyC2orn0TH4b/sEGFeiY42IYgZyhIfDx2C2ikpsfzSa6g9HhIrb06Bhu4ERon5S44wTWBU mIXkmVlInpmFsHgBI/MqRrHUguLc9NRiowJjeAwn5+duYgQnVC33HYwz3n7QO8TIxMF4iFGC g1lJhPdXekSaEG9KYmVValF+fFFpTmrxIUZTYFBPZJYSTc4HpvS8knhDE0sDEzMzQ3MjUwNz JXHee61zU4QE0hNLUrNTUwtSi2D6mDg4pRqYzEScfym+/PpV7HdAVPc1toZl9xwan7wumHfq U0G3kcUyNhaBW/88t1YV/v9+6YTygpVzbY3+9lk7THZdf96if97r/QJH6lKFD+3I5nD69bzK IHEC1/otwb8u2/Tf+HhtxdOQ+GaWqD4Loz6Z27Yce2+oPqiV/xBz0vxFzIqUp5FKlhHdai+F wsOWrhEya11yl5lP2ZY17a7YAt3Tqww5fQRXBEvKyl3/LtrRYXsmo50t387Cck7Z+iV7mH5n Mmg+aj2+LjFRPLRFdP6fbb+/RvWpvbx+Jflb9oLi0pLD1zyzzRITXgVfepS7/vT639dVRCW7 ZGM5721O0JFXOzc9XWjJ0sYVD3duTdh07Y2iEktxRqKhFnNRcSIA1n/f6jEEAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrGLMWRmVeSWpSXmKPExsWy7bCSnK7P6sg0gx8rGS0ezNvGZvHy51U2 i2kffjJb3Dywk8liYz+Hxf2t1xgtLu+aw2bRfX0Hm8Xy4/+YLJ6dPsDswOVx+Yq3x7RJp9g8 Pj69xeLRt2UVo8fnTXIe7Qe6mQLYorhsUlJzMstSi/TtErgybk3exFTQxFnx48UspgbGVexd jJwcEgImEr82zWTtYuTiEBLYzihx8OB1NoiEpMS+0zdZIWxhifstR6CKfjJKrFn5igUkwSag LtEwFcIWEaiW2Nz+lw2kiFlgGpPEolkQ3cICDhKn3i1nBrFZBFQlFt6/BNbAK2AjMW3PeRaI DfIS+w+eBavhFLCVaPl/EuwKIaCa1ZdfQtULSpyc+QTMZgaqb946m3kCo8AsJKlZSFILGJlW MYqmFhTnpucmFxjqFSfmFpfmpesl5+duYgQHvVbQDsZl6//qHWJk4mA8xCjBwawkwvsrPSJN iDclsbIqtSg/vqg0J7X4EKM0B4uSOK9yTmeKkEB6YklqdmpqQWoRTJaJg1OqgUmfseDuw9pl xhy885MYE6InrP/pqXBGOd5oh1nPz0+xBkovC1h4Lyj+FT3k71BzgTV5zws+iTu/XNmev2vL kKhICDdi0u/fpC72dm7u+oTrkj/PymhuFNqporXz/YmITZvdJE0P9lQy9G1OutZw6PMj564F Gayyi2UnheUVTDFnZDWtep9Rn+D7onheT2rb9uX9+1yatO4YRyp/4N4w64LIKalZHLNr4mVX rIuZ6t/qtTDFX2m9d4fMztdxETVb9k80E7jNu+K4mdbzaGH1sr0nJu3p/Oqu4LcmpmNKjpD5 waLNrPePsWUGW3AZnD4ZE20rzX96T5/e9l13Wa/F7Iic6TsxetFTuaYAJ/GJSizFGYmGWsxF xYkArvWw5+kCAAA= X-CMS-MailID: 20240531104948epcas2p1a70f31cd4a1aa5d36267b4187d75056b X-Msg-Generator: CA X-Sendblock-Type: AUTO_CONFIDENTIAL CMS-TYPE: 102P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20240531104948epcas2p1a70f31cd4a1aa5d36267b4187d75056b References: <20240531103821.1583934-1-minwoo.im@samsung.com> If hba_maxq equals poll_queues, which means there are no I/O queues (HCTX_TYPE_DEFAULT, HCTX_TYPE_READ), the very first hw queue will be allocated as HCTX_TYPE_POLL and it will be used as the dev_cmd_queue. In this case, device commands such as QUERY cannot be properly handled. This patch prevents the initialization of MCQ when the number of I/O queues is not set and only the number of POLL queues is set. Signed-off-by: Minwoo Im --- drivers/ufs/core/ufs-mcq.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/ufs/core/ufs-mcq.c b/drivers/ufs/core/ufs-mcq.c index 46faa54aea94..4bcae410c268 100644 --- a/drivers/ufs/core/ufs-mcq.c +++ b/drivers/ufs/core/ufs-mcq.c @@ -179,6 +179,15 @@ static int ufshcd_mcq_config_nr_queues(struct ufs_hba *hba) return -EOPNOTSUPP; } + /* + * Device should support at least one I/O queue to handle device + * commands via hba->dev_cmd_queue. + */ + if (hba_maxq == poll_queues) { + dev_err(hba->dev, "At least one non-poll queue required\n"); + return -EOPNOTSUPP; + } + rem = hba_maxq; if (rw_queues) {