Hi Mauro, On Wed, 05 Jan 2011 15:34:28 -0200, Mauro Carvalho Chehab wrote: > Hi Jean, > > Thanks for your acks for patches 1 and 2. I've already applied the patches > on my tree and at linux-next. I'll try to add the acks on it before sending > upstream. If you can't, it's fine. I merely wanted to show my support to Andy's work, I don't care if I'm not counted as a reviewer for these small patches. > Em 05-01-2011 12:45, Jean Delvare escreveu: > > From a purely technical perspective, changing client->addr in the > > probe() function is totally prohibited. > > Agreed. Btw, there are some other hacks with client->addr abuse on some > other random places at drivers/media, mostly at the device bridge code, > used to test if certain devices are present and/or to open some I2C gates > before doing some init code. People use this approach as it provides a > fast way to do some things. On several cases, the amount of code for > doing such hack is very small, when compared to writing a new I2C driver > just to do some static initialization code. Not sure what would be the > better approach to fix them. Hard to tell without seeing the exact code. Ideally, i2c_new_dummy() would cover these cases: you don't need to write an actual driver for the device, it's perfectly OK to use the freshly instantiated i2c_client from the bridge driver directly. Alternatively, i2c_smbus_xfer() or i2c_transfer() can be used for one-time data exchange with any slave on the bus as long as you know what you're doing (i.e. you know that no i2c_client will ever be instantiated for this slave.) If you have specific cases you don't know how to solve, please point me to them and I'll take a look. -- Jean Delvare -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
