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| author |   Paul Mundt <lethal@linux-sh.org> | 2012-03-28 13:53:10 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2012-03-28 13:53:10 +0900 |
| commit | 18af30e259c25a64ad69bb749c661564bc886275 (patch) | |
| tree | 996c89594fd20f25fcc15b5843625d99473f6982 /drivers/i2c/algos/i2c-algo-bit.c | |
| parent | arch/sh/drivers/dma/{dma-g2,dmabrg}.c: ensure arguments to request_irq and free_irq are compatible (diff) | |
| parent | Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux (diff) | |
| download | wireguard-linux-18af30e259c25a64ad69bb749c661564bc886275.tar.xz wireguard-linux-18af30e259c25a64ad69bb749c661564bc886275.zip | |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux into sh-latest
Diffstat (limited to 'drivers/i2c/algos/i2c-algo-bit.c')
| -rw-r--r-- | drivers/i2c/algos/i2c-algo-bit.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/i2c/algos/i2c-algo-bit.c b/drivers/i2c/algos/i2c-algo-bit.c index 525c7345fa0b..acba1c686c65 100644 --- a/drivers/i2c/algos/i2c-algo-bit.c +++ b/drivers/i2c/algos/i2c-algo-bit.c @@ -103,8 +103,14 @@ static int sclhi(struct i2c_algo_bit_data *adap) * chips may hold it low ("clock stretching") while they * 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; + } cond_resched(); } #ifdef DEBUG @@ -610,10 +616,11 @@ static u32 bit_func(struct i2c_adapter *adap) /* -----exported algorithm data: ------------------------------------- */ -static const struct i2c_algorithm i2c_bit_algo = { +const struct i2c_algorithm i2c_bit_algo = { .master_xfer = bit_xfer, .functionality = bit_func, }; +EXPORT_SYMBOL(i2c_bit_algo); /* * registering functions to load algorithms at runtime |