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| author | Ingo Molnar <mingo@kernel.org> | 2018-07-25 11:47:02 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2018-07-25 11:47:02 +0200 |
| commit | 93081caaaed6a40a4f6d9b7ba3f581a4bb1d4404 (patch) | |
| tree | f574201ba58ddf9e6264f463e613066cfc8532ba /drivers/i2c/i2c-core-base.c | |
| parent | 788faab70d5a882693286b8d5022779559c79904 (diff) | |
| parent | 7f635ff187ab6be0b350b3ec06791e376af238ab (diff) | |
| download | linux-stable-93081caaaed6a40a4f6d9b7ba3f581a4bb1d4404.tar.gz linux-stable-93081caaaed6a40a4f6d9b7ba3f581a4bb1d4404.tar.bz2 linux-stable-93081caaaed6a40a4f6d9b7ba3f581a4bb1d4404.zip | |
Merge branch 'perf/urgent' into perf/core, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/i2c/i2c-core-base.c')
| -rw-r--r-- | drivers/i2c/i2c-core-base.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c index 31d16ada6e7d..301285c54603 100644 --- a/drivers/i2c/i2c-core-base.c +++ b/drivers/i2c/i2c-core-base.c @@ -198,7 +198,16 @@ int i2c_generic_scl_recovery(struct i2c_adapter *adap) val = !val; bri->set_scl(adap, val); - ndelay(RECOVERY_NDELAY); + + /* + * If we can set SDA, we will always create STOP here to ensure + * the additional pulses will do no harm. This is achieved by + * letting SDA follow SCL half a cycle later. + */ + ndelay(RECOVERY_NDELAY / 2); + if (bri->set_sda) + bri->set_sda(adap, val); + ndelay(RECOVERY_NDELAY / 2); } /* check if recovery actually succeeded */ |