Dear all
I am new to kernel driver development. Thanks for any help.
I am modifing a USB Ramdisk to a USB mass storage(MTD) driver in a
dragonball ARM9 platform. I stop when using tasklet. The USB driver
setup with endpoint 1 and 2 to be Interrupt IN and OUT point. So when
ever there is a interrupt , I schedule the tasklet to read or write with
semphone variable protection.
The problem i am facing is that the read/write process is TOO SLOW
for the host to response. I have tried to not use tasklet and call the
read/write function directly, it works with small file but "schedule in
interrupt" oops prompt out when transfer a large file . I have also try
to use spin_lock_irqsave.. but it will stop the interrupt...
I am in a hurry on this. Please give me a hand.
Thanks
Mike,Lee