diff options
| author | Long Li <longli@microsoft.com> | 2018-03-22 22:47:18 +0100 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-04-20 21:36:02 +0200 |
| commit | f286299c1d0ba5e2ca0377610307b370fe178767 (patch) | |
| tree | 492a4083821b4f29789a6b3014975726ea7604cd /drivers/scsi/storvsc_drv.c | |
| parent | scsi: target: fix crash with iscsi target and dvd (diff) | |
| download | linux-f286299c1d0ba5e2ca0377610307b370fe178767.tar.xz linux-f286299c1d0ba5e2ca0377610307b370fe178767.zip | |
scsi: storvsc: Set up correct queue depth values for IDE devices
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@microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/storvsc_drv.c')
| -rw-r--r-- | drivers/scsi/storvsc_drv.c | 7 |
1 files 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 * |