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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-04-25 09:42:42 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-04-25 09:42:42 +0100 |
| commit | a126f7c41d80322b42ae0383ed3dcb17ee0296fc (patch) | |
| tree | 67f3605e72e01f7ec0b15af22d9d7b6ef8598b55 /drivers/char/random.c | |
| parent | 0098fc39e6d575f940487f09f303787efbc7a373 (diff) | |
| parent | a7eb7c6f9a657a01a8359edae31bbeacd18b072c (diff) | |
Merge branch 'mcpm' of git://git.linaro.org/people/nico/linux into devel-stable
Diffstat (limited to 'drivers/char/random.c')
| -rw-r--r-- | drivers/char/random.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/char/random.c b/drivers/char/random.c index 594bda9dcfc8..32a6c5764950 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -852,6 +852,7 @@ static size_t account(struct entropy_store *r, size_t nbytes, int min, int reserved) { unsigned long flags; + int wakeup_write = 0; /* Hold lock while accounting */ spin_lock_irqsave(&r->lock, flags); @@ -873,10 +874,8 @@ static size_t account(struct entropy_store *r, size_t nbytes, int min, else r->entropy_count = reserved; - if (r->entropy_count < random_write_wakeup_thresh) { - wake_up_interruptible(&random_write_wait); - kill_fasync(&fasync, SIGIO, POLL_OUT); - } + if (r->entropy_count < random_write_wakeup_thresh) + wakeup_write = 1; } DEBUG_ENT("debiting %zu entropy credits from %s%s\n", @@ -884,6 +883,11 @@ static size_t account(struct entropy_store *r, size_t nbytes, int min, spin_unlock_irqrestore(&r->lock, flags); + if (wakeup_write) { + wake_up_interruptible(&random_write_wait); + kill_fasync(&fasync, SIGIO, POLL_OUT); + } + return nbytes; } |