Manfred Petz wrote: > actually, both patches help. no more timeouts, and the frontend drivers > get loaded correctly (tried each patch separately). tried with latest hg > & 2.6.22. > I don't understand why both patches do solve the timeout problem. The message 'timed out waiting for end of xfer' means, that no i2c-interrupt was delivered. In this case, the return value of saa7146_i2c_writeout() is -EIO. The first patch has only an effect, if the return value is -EREMOTEIO. The second patch reduces the i2c bit-rate. Usually, it has nothing to do with the interrupts. Independently of this, I've found some strange things. The drivers for the TT-C2300 and the Cinergy DVB-C cards probe some i2c devices which don't exist. This results in an address error (missing ACK after the device address). I see three interrupts for this error. The first sets I2C_BUSY and I2C_APERR within I2C_STATUS. It does not wake-up the waiting thread and may print the message 'unhandled irq: i2c'. The second interrupt is the normal error interrupt which does wake-up the thread. I2C_BUSSY, I2C_ERR and I2C_APERR are set. The third interrupt has set the same three status bits. It may print the message 'unexpected irq: i2c', because the thread was already wake-up. If the chip-set is only able to deliver the first interrupt, the error interrupt will be never delivered and the timeout occurs. - Hartmut _______________________________________________ linux-dvb mailing list linux-dvb@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
