diff options
| author | Alex Dubov <oakad@yahoo.com> | 2008-07-25 19:45:00 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-26 12:00:04 -0700 |
| commit | b77899985bdfd85a8e5a6e485033a9b4713d2471 (patch) | |
| tree | 5cf53074b73de6fc27d8d8b0ac78fc8d32c0b9df /drivers/memstick/core | |
| parent | 0147600172b4a5d261165d1aa5ef818d84da1557 (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/core')
| -rw-r--r-- | drivers/memstick/core/memstick.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/drivers/memstick/core/memstick.c b/drivers/memstick/core/memstick.c index 61b98c333cb..3c7d9a79c1e 100644 --- a/drivers/memstick/core/memstick.c +++ b/drivers/memstick/core/memstick.c @@ -415,10 +415,14 @@ err_out: return NULL; } -static void memstick_power_on(struct memstick_host *host) +static int memstick_power_on(struct memstick_host *host) { - host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_ON); - host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_SERIAL); + int rc = host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_ON); + + if (!rc) + rc = host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_SERIAL); + + return rc; } static void memstick_check(struct work_struct *work) @@ -573,11 +577,15 @@ EXPORT_SYMBOL(memstick_suspend_host); */ void memstick_resume_host(struct memstick_host *host) { + int rc = 0; + mutex_lock(&host->lock); if (host->card) - memstick_power_on(host); + rc = memstick_power_on(host); mutex_unlock(&host->lock); - memstick_detect_change(host); + + if (!rc) + memstick_detect_change(host); } EXPORT_SYMBOL(memstick_resume_host); |