[PATCH 3/6] Drivers: scsi: storvsc: Make the scsi timeout a module parameter

K. Y. Srinivasan
2013-05-15T22:02:31Z

The standard scsi timeout is not appropriate in some of the environments where
Hyper-V is deployed. Set this timeout appropriately for all devices managed
by this driver. Further make this a module parameter.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
---
drivers/scsi/storvsc_drv.c | 9 +++++++++
1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
index 16a3a0c..8d29a95 100644
--- a/drivers/scsi/storvsc_drv.c
+++ b/drivers/scsi/storvsc_drv.c
@@ -221,6 +221,13 @@ static int storvsc_ringbuffer_size = (20 * PAGE_SIZE);
module_param(storvsc_ringbuffer_size, int, S_IRUGO);
MODULE_PARM_DESC(storvsc_ringbuffer_size, "Ring buffer size (bytes)");

+/*
+ * Timeout in seconds for all devices managed by this driver.
+ */
+static int storvsc_timeout = 180;
+module_param(storvsc_timeout, uint, (S_IRUGO | S_IWUSR));
+MODULE_PARM_DESC(storvsc_timeout, "Device timeout (seconds)");
+
#define STORVSC_MAX_IO_REQUESTS 128

/*
@@ -1204,6 +1211,8 @@ static int storvsc_device_configure(struct scsi_device *sdevice)

blk_queue_bounce_limit(sdevice->request_queue, BLK_BOUNCE_ANY);

+ blk_queue_rq_timeout(sdevice->request_queue, (storvsc_timeout * HZ));
+
sdevice->no_write_same = 1;

return 0;
--
1.7.4.1