[PATCH RFC] scsi: ufs: Disable blk-mq for now

From: Adrian Hunter <adrian.hunter@intel.com>
To: "Martin K . Petersen" <martin.petersen@oracle.com>,
	"James E . J . Bottomley" <jejb@linux.vnet.ibm.com>
Cc: Jens Axboe <axboe@kernel.dk>, Christoph Hellwig <hch@lst.de>,
	Ming Lei <ming.lei@redhat.com>,
	Johannes Thumshirn <jthumshirn@suse.de>,
	Bart Van Assche <Bart.VanAssche@wdc.com>,
	linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org,
	Stanislav Nijnikov <stanislav.nijnikov@wdc.com>,
	Evan Green <evgreen@chromium.org>,
	Vinayak Holikatti <vinholikatti@gmail.com>,
	Janek Kotas <jank@cadence.com>,
	Vivek Gautam <vivek.gautam@codeaurora.org>,
	Asutosh Das <asutoshd@codeaurora.org>,
	Subhash Jadavani <subhashj@codeaurora.org>,
	Sayali Lokhande <sayalil@codeaurora.org>,
	Li Wei <liwei213@huawei.com>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	Jaegeuk Kim <jaegeuk@kernel.org>,
	Alim Akhtar <alim.akhtar@samsung.com>,
	Alex Lemberg <Alex.Lemberg@sandisk.com>
Subject: [PATCH RFC] scsi: ufs: Disable blk-mq for now
Date: Thu, 13 Sep 2018 14:28:48 +0300	[thread overview]
Message-ID: <20180913112848.7807-1-adrian.hunter@intel.com> (raw)

blk-mq does not support runtime pm, so disable blk-mq support for now.

Fixes: d5038a13eca7 ("scsi: core: switch to scsi-mq by default")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
 drivers/scsi/ufs/ufshcd.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 40548bae8efa..a4d36497a047 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -7975,6 +7975,13 @@ int ufshcd_alloc_host(struct device *dev, struct ufs_hba **hba_handle)
 		err = -ENOMEM;
 		goto out_error;
 	}
+
+	/*
+	 * Do not use blk-mq at this time because blk-mq does not support
+	 * runtime pm.
+	 */
+	host->use_blk_mq = false;
+
 	hba = shost_priv(host);
 	hba->host = host;
 	hba->dev = dev;
-- 
2.17.1

