[lm-sensors] Patch: fschmd-watchdog-v2.patch

Jean Delvare khali at linux-fr.org
Thu Oct 16 16:52:34 CEST 2008


Hi Hans,

On Thu, 16 Oct 2008 16:02:22 +0200, Hans de Goede wrote:
> Jean Delvare wrote:
> > As a side note, I wonder if it would make sense to have a separate lock
> > for the watchdog struct members. fschmd_update_device() can hold
> > data->update_lock for a significant amount of time, and you probably
> > don(t want to delay watchdog_timer() too much.
> > 
> 
> Hmm, question: can one do multiple i2c_smbus_read/write_byte_data() requests 
> and will the i2c core then do locking to serialize requests?

Yes, i2c-core serializes transaction requests that go to each i2c
adapter, using the i2c_adapter->bus_lock mutex. This can be seen in
i2c-core.c, in functions i2c_smbus_xfer() and i2c_transfer().

-- 
Jean Delvare




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