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Staging: hv: Add a function to map a hv_driver pointer to storvsc driver

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Get rid of the need for struct hv_device to be the first
element of struct host_device_context.

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
2011-03-28 09:33:29 -07:00
committed by Greg Kroah-Hartman
parent 1e05d88e93
commit ced01b0df7
3 changed files with 8 additions and 4 deletions
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2
drivers/staging/hv/blkvsc_drv.c
View File

@@ -154,7 +154,7 @@ static int blk_vsc_initialize(struct hv_driver *driver)
struct storvsc_driver_object *stor_driver;
int ret = 0;
stor_driver = (struct storvsc_driver_object *)driver;
stor_driver = hvdr_to_stordr(driver);
/* Make sure we are at least 2 pages since 1 page is used for control */
/* ASSERT(stor_driver->RingBufferSize >= (PAGE_SIZE << 1)); */

8
drivers/staging/hv/storvsc_api.h
View File

@@ -25,6 +25,7 @@
#ifndef _STORVSC_API_H_
#define _STORVSC_API_H_
#include <linux/kernel.h>
#include "vstorage.h"
#include "vmbus_api.h"
@@ -90,8 +91,6 @@ struct hv_storvsc_request {
/* Represents the block vsc driver */
struct storvsc_driver_object {
/* Must be the first field */
/* Which is a bug FIXME! */
struct hv_driver base;
/* Set by caller (in bytes) */
@@ -159,6 +158,11 @@ static inline void put_stor_device(struct hv_device *device)
atomic_dec(&stor_device->ref_count);
}
static inline struct storvsc_driver_object *hvdr_to_stordr(struct hv_driver *d)
{
return container_of(d, struct storvsc_driver_object, base);
}
/* Interface */
int stor_vsc_on_device_add(struct hv_device *device,

2
drivers/staging/hv/storvsc_drv.c
View File

@@ -79,7 +79,7 @@ static int stor_vsc_initialize(struct hv_driver *driver)
{
struct storvsc_driver_object *stor_driver;
stor_driver = (struct storvsc_driver_object *)driver;
stor_driver = hvdr_to_stordr(driver);
DPRINT_DBG(STORVSC, "sizeof(STORVSC_REQUEST)=%zd "
"sizeof(struct storvsc_request_extension)=%zd "