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Staging: hv: storvsc_drv: Compute max_outstanding_req_per_channel where it is needed

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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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
K. Y. Srinivasan 2011-05-10 07:55:58 -07:00 committed by Greg Kroah-Hartman
parent 9d41889fd6
commit 01415ab3d2
1 changed files with 15 additions and 15 deletions
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30
drivers/staging/hv/storvsc_drv.c
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@ -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;