[PATCH 132/206] Staging: hv: Compute max_outstanding_req_per_channel where it is needed

K. Y. Srinivasan
2011-05-10T08:38:32Z

Compute max_outstanding_req_per_channel where it is needed.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Abhishek Kane <v-abkane@microsoft.com>
Signed-off-by: Hank Janssen <hjanssen@microsoft.com>
---
drivers/staging/hv/storvsc_drv.c | 30 +++++++++++++++---------------
1 files changed, 15 insertions(+), 15 deletions(-)

diff --git a/drivers/staging/hv/storvsc_drv.c b/drivers/staging/hv/storvsc_drv.c
index 07db877..7d8b8f9 100644
--- a/drivers/staging/hv/storvsc_drv.c
+++ b/drivers/staging/hv/storvsc_drv.c
@@ -90,20 +90,6 @@ static int storvsc_initialize(struct hv_driver *driver)
memcpy(&driver->dev_type, &gStorVscDeviceType,
sizeof(struct hv_guid));

-
- /*
- * Divide the ring buffer data size (which is 1 page less
- * than the ring buffer size since that page is reserved for
- * the ring buffer indices) by the max request size (which is
- * vmbus_channel_packet_multipage_buffer + struct vstor_packet + u64)
- */
- stor_driver->max_outstanding_req_per_channel =
- ((stor_driver->ring_buffer_size - PAGE_SIZE) /
- ALIGN(MAX_MULTIPAGE_BUFFER_PACKET +
- sizeof(struct vstor_packet) + sizeof(u64),
- sizeof(u64)));
-
-
return 0;
}

@@ -797,13 +783,27 @@ static int storvsc_drv_init(void)
int ret;
struct storvsc_driver *storvsc_drv_obj = &storvsc_drv;
struct hv_driver *drv = &storvsc_drv.base;
+ u32 max_outstanding_req_per_channel;
+
+ /*
+ * Divide the ring buffer data size (which is 1 page less
+ * than the ring buffer size since that page is reserved for
+ * the ring buffer indices) by the max request size (which is
+ * vmbus_channel_packet_multipage_buffer + struct vstor_packet + u64)
+ */
+
+ max_outstanding_req_per_channel =
+ ((storvsc_ringbuffer_size - PAGE_SIZE) /
+ ALIGN(MAX_MULTIPAGE_BUFFER_PACKET +
+ sizeof(struct vstor_packet) + sizeof(u64),
+ sizeof(u64)));

storvsc_drv_obj->ring_buffer_size = storvsc_ringbuffer_size;

/* Callback to client driver to complete the initialization */
storvsc_initialize(&storvsc_drv_obj->base);

- if (storvsc_drv_obj->max_outstanding_req_per_channel <
+ if (max_outstanding_req_per_channel <
STORVSC_MAX_IO_REQUESTS)
return -1;

--
1.7.4.1