diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-06-20 16:24:02 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-06-20 16:24:02 -0700 |
| commit | ff446f2001cf9b5ed97c6256c4ee3549d3b7abed (patch) | |
| tree | ec5fd60a8b9c21ae85eaa99003f26e6c342e2234 /drivers/char/hw_random/atmel-rng.c | |
| parent | 78091dc2f6f04b03131218df590c877cadcd9379 (diff) | |
| parent | 485802a6c524e62b5924849dd727ddbb1497cc71 (diff) | |
Merge 3.5-rc3 into usb-next
This lets us catch the USB fixes that went into 3.5-rc3 into this branch,
as we want them here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/char/hw_random/atmel-rng.c')
| -rw-r--r-- | drivers/char/hw_random/atmel-rng.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/char/hw_random/atmel-rng.c b/drivers/char/hw_random/atmel-rng.c index f518b99f53f5..6289f0eee24c 100644 --- a/drivers/char/hw_random/atmel-rng.c +++ b/drivers/char/hw_random/atmel-rng.c @@ -36,6 +36,13 @@ static int atmel_trng_read(struct hwrng *rng, void *buf, size_t max, /* data ready? */ if (readl(trng->base + TRNG_ODATA) & 1) { *data = readl(trng->base + TRNG_ODATA); + /* + ensure data ready is only set again AFTER the next data + word is ready in case it got set between checking ISR + and reading ODATA, so we don't risk re-reading the + same word + */ + readl(trng->base + TRNG_ISR); return 4; } else return 0; |