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Merge branch 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging

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Pull i2c subsystem fixes from Jean Delvare.

* 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
  i2c-algo-bit: Fix spurious SCL timeouts under heavy load
  i2c-core: Comment says "transmitted" but means "received"
This commit is contained in:
Linus Torvalds 2012-03-15 17:14:35 -07:00
commit 7c32442ff8
2 changed files with 15 additions and 5 deletions
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8
drivers/i2c/algos/i2c-algo-bit.c
View File

@ -103,8 +103,14 @@ static int sclhi(struct i2c_algo_bit_data *adap)
* chips may hold it low ("clock stretching") while they * chips may hold it low ("clock stretching") while they
* are processing data internally. * are processing data internally.
*/ */
if (time_after(jiffies, start + adap->timeout)) if (time_after(jiffies, start + adap->timeout)) {
/* Test one last time, as we may have been preempted
* between last check and timeout test.
*/
if (getscl(adap))
break;
return -ETIMEDOUT; return -ETIMEDOUT;
}
cond_resched(); cond_resched();
} }
#ifdef DEBUG #ifdef DEBUG

12
drivers/i2c/i2c-core.c
View File

@ -1386,8 +1386,10 @@ int i2c_master_send(const struct i2c_client *client, const char *buf, int count)
ret = i2c_transfer(adap, &msg, 1); ret = i2c_transfer(adap, &msg, 1);
/* If everything went ok (i.e. 1 msg transmitted), return #bytes /*
transmitted, else error code. */ * If everything went ok (i.e. 1 msg transmitted), return #bytes
* transmitted, else error code.
*/
return (ret == 1) ? count : ret; return (ret == 1) ? count : ret;
} }
EXPORT_SYMBOL(i2c_master_send); EXPORT_SYMBOL(i2c_master_send);
@ -1414,8 +1416,10 @@ int i2c_master_recv(const struct i2c_client *client, char *buf, int count)
ret = i2c_transfer(adap, &msg, 1); ret = i2c_transfer(adap, &msg, 1);
/* If everything went ok (i.e. 1 msg transmitted), return #bytes /*
transmitted, else error code. */ * If everything went ok (i.e. 1 msg received), return #bytes received,
* else error code.
*/
return (ret == 1) ? count : ret; return (ret == 1) ? count : ret;
} }
EXPORT_SYMBOL(i2c_master_recv); EXPORT_SYMBOL(i2c_master_recv);