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| author | Ville Syrjala <syrjala@sci.fi> | 2012-03-15 21:11:05 +0400 |
|---|---|---|
| committer | Jean Delvare <khali@endymion.delvare> | 2012-03-15 21:11:05 +0400 |
| commit | 8ee161ce5e0cfc689eb677f227a6248191165fac (patch) | |
| tree | e1c6aa2b4788eec7e9e552b90be10cd4ae5333ef /lib/rational.c | |
| parent | 834aa6f30c2f5f5ab7c858e37800c1a19dfde2fb (diff) | |
| download | linux-8ee161ce5e0cfc689eb677f227a6248191165fac.tar.xz | |
i2c-algo-bit: Fix spurious SCL timeouts under heavy load
When the system is under heavy load, there can be a significant delay
between the getscl() and time_after() calls inside sclhi(). That delay
may cause the time_after() check to trigger after SCL has gone high,
causing sclhi() to return -ETIMEDOUT.
To fix the problem, double check that SCL is still low after the
timeout has been reached, before deciding to return -ETIMEDOUT.
Signed-off-by: Ville Syrjala <syrjala@sci.fi>
Cc: stable@vger.kernel.org
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'lib/rational.c')
0 files changed, 0 insertions, 0 deletions