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| author | Jeff Garzik <jeff@garzik.org> | 2006-08-29 17:55:59 -0400 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2006-08-29 17:55:59 -0400 |
| commit | b01e86fee6c821e4e003fd4e9f65453ac478a58e (patch) | |
| tree | 21695e10cbe7001d2ccc8c87cee5e7a7865b1025 /drivers/acpi/osl.c | |
| parent | e889173c2c67dc288e9b050ab066cfae151b047e (diff) | |
| parent | 60d4684068ff1eec78f55b5888d0bd2d4cca1520 (diff) | |
Merge /spare/repo/linux-2.6 into upstream
Diffstat (limited to 'drivers/acpi/osl.c')
| -rw-r--r-- | drivers/acpi/osl.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index b7d1514cd19..507f051d1ce 100644 --- a/drivers/acpi/osl.c +++ b/drivers/acpi/osl.c @@ -746,6 +746,16 @@ acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", handle, units, timeout)); + /* + * This can be called during resume with interrupts off. + * Like boot-time, we should be single threaded and will + * always get the lock if we try -- timeout or not. + * If this doesn't succeed, then we will oops courtesy of + * might_sleep() in down(). + */ + if (!down_trylock(sem)) + return AE_OK; + switch (timeout) { /* * No Wait: |