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memstick: add memstick_suspend/resume_host methods

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Bus driver may need to be informed that host is being suspended/resumed.

Signed-off-by: Alex Dubov <oakad@yahoo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alex Dubov 2008-03-10 11:43:38 -07:00 committed by Linus Torvalds
parent e1f19995f5
commit d114ad54ff
3 changed files with 31 additions and 4 deletions
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25
drivers/memstick/core/memstick.c
View file

@ -561,6 +561,31 @@ void memstick_free_host(struct memstick_host *host)
}
EXPORT_SYMBOL(memstick_free_host);
/**
* memstick_suspend_host - notify bus driver of host suspension
* @host - host to use
*/
void memstick_suspend_host(struct memstick_host *host)
{
mutex_lock(&host->lock);
host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_OFF);
mutex_unlock(&host->lock);
}
EXPORT_SYMBOL(memstick_suspend_host);
/**
* memstick_resume_host - notify bus driver of host resumption
* @host - host to use
*/
void memstick_resume_host(struct memstick_host *host)
{
mutex_lock(&host->lock);
host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_ON);
mutex_unlock(&host->lock);
memstick_detect_change(host);
}
EXPORT_SYMBOL(memstick_resume_host);
int memstick_register_driver(struct memstick_driver *drv)
{
drv->driver.bus = &memstick_bus_type;

8
drivers/memstick/host/tifm_ms.c
View file

@ -627,17 +627,17 @@ static void tifm_ms_remove(struct tifm_dev *sock)
static int tifm_ms_suspend(struct tifm_dev *sock, pm_message_t state)
{
struct memstick_host *msh = tifm_get_drvdata(sock);
memstick_suspend_host(msh);
return 0;
}
static int tifm_ms_resume(struct tifm_dev *sock)
{
struct memstick_host *msh = tifm_get_drvdata(sock);
struct tifm_ms *host = memstick_priv(msh);
tifm_ms_initialize_host(host);
memstick_detect_change(msh);
memstick_resume_host(msh);
return 0;
}

2
include/linux/memstick.h
View file

@ -312,6 +312,8 @@ int memstick_add_host(struct memstick_host *host);
void memstick_remove_host(struct memstick_host *host);
void memstick_free_host(struct memstick_host *host);
void memstick_detect_change(struct memstick_host *host);
void memstick_suspend_host(struct memstick_host *host);
void memstick_resume_host(struct memstick_host *host);
void memstick_init_req_sg(struct memstick_request *mrq, unsigned char tpc,
struct scatterlist *sg);