diff options
| author | Paul Mackerras <paulus@samba.org> | 2008-01-31 03:25:51 +0300 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-01-31 03:25:51 +0300 |
| commit | bd45ac0c5daae35e7c71138172e63df5cf644cf6 (patch) | |
| tree | 5eb5a599bf6a9d7a8a34e802db932aa9e9555de4 /drivers/char/hw_random/omap-rng.c | |
| parent | 4eece4ccf997c0e6d8fdad3d842e37b16b8d705f (diff) | |
| parent | 5bdeae46be6dfe9efa44a548bd622af325f4bdb4 (diff) | |
| download | linux-bd45ac0c5daae35e7c71138172e63df5cf644cf6.tar.xz | |
Merge branch 'linux-2.6'
Diffstat (limited to 'drivers/char/hw_random/omap-rng.c')
| -rw-r--r-- | drivers/char/hw_random/omap-rng.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/char/hw_random/omap-rng.c b/drivers/char/hw_random/omap-rng.c index 3f35a1c562b1..7e319951fa41 100644 --- a/drivers/char/hw_random/omap-rng.c +++ b/drivers/char/hw_random/omap-rng.c @@ -29,6 +29,7 @@ #include <linux/err.h> #include <linux/platform_device.h> #include <linux/hw_random.h> +#include <linux/delay.h> #include <asm/io.h> @@ -65,9 +66,17 @@ static void omap_rng_write_reg(int reg, u32 val) } /* REVISIT: Does the status bit really work on 16xx? */ -static int omap_rng_data_present(struct hwrng *rng) +static int omap_rng_data_present(struct hwrng *rng, int wait) { - return omap_rng_read_reg(RNG_STAT_REG) ? 0 : 1; + int data, i; + + for (i = 0; i < 20; i++) { + data = omap_rng_read_reg(RNG_STAT_REG) ? 0 : 1; + if (data || !wait) + break; + udelay(10); + } + return data; } static int omap_rng_data_read(struct hwrng *rng, u32 *data) |