"ext Frantisek Dufka" <[EMAIL PROTECTED]> writes: > So you need to be familiar with the driver and tell us if it is > possible to sleep inside cx3110x_spi_dma_read and > cx3110x_spi_dma_write.
cx3110x uses tasklets and it's not possible sleep in a tasklet. > And one also needs to be familiar with kernel programming and > waiting primitives to suggest how to sleep and wait for the callback > (if possible in this context) and how to wake up the sleeping code > from the dma callback. Basically I see two choices here, either you could either convert the driver to use a workqueue and use wait_for_completion()/complete() or convert the interrupt handling to use asynchronous calls. The latter is more difficult, but you might get some performance savings. You could ditch tasklet altogether and use interrupt handler. But I can't spend any time on the 770 driver, I can only wish you good luck. -- Kalle Valo _______________________________________________ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
