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authorAlex Dubov <oakad@yahoo.com>2008-07-25 19:45:00 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-26 12:00:04 -0700
commitb77899985bdfd85a8e5a6e485033a9b4713d2471 (patch)
tree5cf53074b73de6fc27d8d8b0ac78fc8d32c0b9df /drivers/memstick/host/tifm_ms.c
parent0147600172b4a5d261165d1aa5ef818d84da1557 (diff)
memstick: allow "set_param" method to return an error code
Some controllers (Jmicron, for instance) can report temporal failure condition during power-on. It is desirable to account for this using a return value of "set_param" device method. The return value can also be handy to distinguish between supported and unsupported device parameters in run time. [akpm@linux-foundation.org: coding-style fixes] 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>
Diffstat (limited to 'drivers/memstick/host/tifm_ms.c')
-rw-r--r--drivers/memstick/host/tifm_ms.c17
1 files changed, 8 insertions, 9 deletions
diff --git a/drivers/memstick/host/tifm_ms.c b/drivers/memstick/host/tifm_ms.c
index 8577de4ebb0..14458764588 100644
--- a/drivers/memstick/host/tifm_ms.c
+++ b/drivers/memstick/host/tifm_ms.c
@@ -489,15 +489,12 @@ static void tifm_ms_request(struct memstick_host *msh)
return;
}
-static void tifm_ms_set_param(struct memstick_host *msh,
- enum memstick_param param,
- int value)
+static int tifm_ms_set_param(struct memstick_host *msh,
+ enum memstick_param param,
+ int value)
{
struct tifm_ms *host = memstick_priv(msh);
struct tifm_dev *sock = host->dev;
- unsigned long flags;
-
- spin_lock_irqsave(&sock->lock, flags);
switch (param) {
case MEMSTICK_POWER:
@@ -512,7 +509,8 @@ static void tifm_ms_set_param(struct memstick_host *msh,
writel(TIFM_MS_SYS_FCLR | TIFM_MS_SYS_INTCLR,
sock->addr + SOCK_MS_SYSTEM);
writel(0xffffffff, sock->addr + SOCK_MS_STATUS);
- }
+ } else
+ return -EINVAL;
break;
case MEMSTICK_INTERFACE:
if (value == MEMSTICK_SERIAL) {
@@ -525,11 +523,12 @@ static void tifm_ms_set_param(struct memstick_host *msh,
writel(TIFM_CTRL_FAST_CLK
| readl(sock->addr + SOCK_CONTROL),
sock->addr + SOCK_CONTROL);
- }
+ } else
+ return -EINVAL;
break;
};
- spin_unlock_irqrestore(&sock->lock, flags);
+ return 0;
}
static void tifm_ms_abort(unsigned long data)