[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20180618080611.520345544@linuxfoundation.org>
Date: Mon, 18 Jun 2018 10:10:50 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Long Li <longli@...rosoft.com>,
Michael Kelley <mikelley@...rosoft.com>,
"Martin K. Petersen" <martin.petersen@...cle.com>,
Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.16 065/279] scsi: storvsc: Set up correct queue depth values for IDE devices
4.16-stable review patch. If anyone has any objections, please let me know.
------------------
From: Long Li <longli@...rosoft.com>
[ Upstream commit f286299c1d0ba5e2ca0377610307b370fe178767 ]
Unlike SCSI and FC, we don't use multiple channels for IDE. Also fix
the calculation for sub-channels.
Signed-off-by: Long Li <longli@...rosoft.com>
Reviewed-by: Michael Kelley <mikelley@...rosoft.com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/scsi/storvsc_drv.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
--- a/drivers/scsi/storvsc_drv.c
+++ b/drivers/scsi/storvsc_drv.c
@@ -1722,11 +1722,14 @@ static int storvsc_probe(struct hv_devic
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 *
Powered by blists - more mailing lists