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module: try_then_request_module must wait

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Since the whole point of try_then_request_module is to retry
the operation after a module has been loaded, we must wait for
the module to fully load.

Otherwise all sort of things start breaking, e.g., you won't
be able to read your encrypted disks on the first attempt.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Tested-by: Maciej Rutecki <maciej.rutecki@gmail.com>
Tested-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Herbert Xu 2009-04-09 10:35:47 +08:00 committed by Linus Torvalds
parent f4efdd65b7
commit 97c18e2c7a
1 changed files with 1 additions and 1 deletions
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include/linux/kmod.h
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@ -34,7 +34,7 @@ extern int __request_module(bool wait, const char *name, ...) \
#define request_module(mod...) __request_module(true, mod)
#define request_module_nowait(mod...) __request_module(false, mod)
#define try_then_request_module(x, mod...) \
((x) ?: (__request_module(false, mod), (x)))
((x) ?: (__request_module(true, mod), (x)))
#else
static inline int request_module(const char *name, ...) { return -ENOSYS; }
static inline int request_module_nowait(const char *name, ...) { return -ENOSYS; }