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firmware loader: fix comments on request_firmware_nowait 

request_firmware_nowait is allowed to be called in atomic
context now if @gfp is GFP_ATOMIC, so fix the obsolete
comments and states which situations are suitable for using
it.

Signed-off-by: Ming Lei <ming.lei@canonical.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.1
Ming Lei 2012-08-04 12:01:24 +08:00 committed by Greg Kroah-Hartman
parent 0cfc1e1e7b
commit 6f21a62a58
1 changed files with 7 additions and 3 deletions
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10
drivers/base/firmware_class.c
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@ -846,9 +846,13 @@ static void request_firmware_work_func(struct work_struct *work)
*
* Caller must hold the reference count of @device.
*
* Asynchronous variant of request_firmware() for user contexts where
* it is not possible to sleep for long time. It can't be called
* in atomic contexts.
* Asynchronous variant of request_firmware() for user contexts:
* - sleep for as small periods as possible since it may
* increase kernel boot time of built-in device drivers
* requesting firmware in their ->probe() methods, if
* @gfp is GFP_KERNEL.
*
* - can't sleep at all if @gfp is GFP_ATOMIC.
**/
int
request_firmware_nowait(