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memstick: allow "set_param" method to return an error code

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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>
This commit is contained in:
Alex Dubov
2008-07-25 19:45:00 -07:00
committed by Linus Torvalds
parent 0147600172
commit b77899985b
4 changed files with 71 additions and 33 deletions
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2
include/linux/memstick.h
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@@ -284,7 +284,7 @@ struct memstick_host {
/* Notify the host that some requests are pending. */
void (*request)(struct memstick_host *host);
/* Set host IO parameters (power, clock, etc). */
void (*set_param)(struct memstick_host *host,
int (*set_param)(struct memstick_host *host,
enum memstick_param param,
int value);
unsigned long private[0] ____cacheline_aligned;