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Y . Srinivasan" , Haiyang Zhang , Stephen Hemminger , "James E . J . Bottomley" , "Martin K . Petersen" , devel@linuxdriverproject.org, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2] storvsc: Set up correct queue depth values for IDE devices Date: Thu, 22 Mar 2018 14:47:18 -0700 Message-Id: <20180322214718.29547-1-longli@linuxonhyperv.com> X-Mailer: git-send-email 2.15.1 X-CMAE-Envelope: MS4wfO/suPO+RwtKAC+8Y24aPAm2MOOJ4U2Xuuf4/nxkxcwIm5Od5tsK3UQI1tLo96dHdovxJ+T50J7Jb99bUuMm8aY1idm/9cqpBMY6nL4r8Psgvopor+AE 4Qt8lAFJRRMKh3x/FnXQh0wIbiJNO7YiLhvBL7lLMo3FCXdMtS2+vnubGMSbl6euvmLkSkwohDh55np+3hygF7jjSzIY9FzGWaI9g+VF97DkFHQhNx5/nPJc UQPoiKlv7/MKTGRFoNX+QPbZ9VnE6H8PplLJSChKiehgDxtxCKrQKrURIUMl+xhYleg/uVX7KVOCxoM0mo5rNQumEhBTt90GpcxgLJLM2pP8ANSareSN4RZF 16bX/QLdSM68/wByIxPlW0j3B+mg9twWbgB/0youoTvcHxE9fN5sd2lOBwoF+vBEF8bbbQrKvZcuGf4WHLkfbkPa3xvBgYjO5CPh26Ag4WLMQAFEkHzedYD9 +tD/MbkT9yra2esiegtphsXtP3yxJaK7c/kwgLZ3gGl9VczNujMOGVCtxSQ= X-BeenThere: driverdev-devel@linuxdriverproject.org X-Mailman-Version: 2.1.24 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: driverdev-devel-bounces@linuxdriverproject.org Sender: "devel" X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: From: Long Li Unlike SCSI and FC, we don't use multiple channels for IDE. Also fix the calculation for sub-channels. Change log: v2: Addressed comment on incorrect number of sub-channels. (Michael Kelley ) Signed-off-by: Long Li --- drivers/scsi/storvsc_drv.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c index 8c51d628b52e..a2ec0bc9e9fa 100644 --- a/drivers/scsi/storvsc_drv.c +++ b/drivers/scsi/storvsc_drv.c @@ -1722,11 +1722,14 @@ static int storvsc_probe(struct hv_device *device, max_targets = STORVSC_MAX_TARGETS; max_channels = STORVSC_MAX_CHANNELS; /* - * On Windows8 and above, we support sub-channels for storage. + * On Windows8 and above, we support sub-channels for storage + * on SCSI and FC controllers. * The number of sub-channels offerred is based on the number of * VCPUs in the guest. */ - max_sub_channels = (num_cpus / storvsc_vcpus_per_sub_channel); + if (!dev_is_ide) + max_sub_channels = + (num_cpus - 1) / storvsc_vcpus_per_sub_channel; } scsi_driver.can_queue = (max_outstanding_req_per_channel * -- 2.14.1 _______________________________________________ devel mailing list devel@linuxdriverproject.org http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel