Am Sonntag, 31. Mai 2009 18:03:07 schrieb Alexander Lyasin:
> Hi all!
> There are drivers for 2.6.28 .. Linux kernels
> They have been tested and work.
> I am still a beginner and I do not know where to send the source code,
> maybe they would useful for community.
> Alexander V. Lyasin
That's a bug:
retval=send_hello(dev);
if (retval) SAMERR("not reply from device, err code: %i", retval);
exit:
return retval;
}
If you return an error from open() you must undo all changes.
static ssize_t at91sam_write (struct file *file,
const char __user *buffer, size_t count, loff_t *ppos) {
int retval=0,
count_bytes,
needed_write_bytes=0;
char addrbuf[ADDRESS_SIZE+1],
lendata[ADDRESS_SIZE+1],
DMA on the stack. On some architectures this will fail.
mutex_lock(&dev->io_mutex);
if (!dev->interface) {
SAMERR("can't get device interfase from %s", __FUNCTION__);
return -ENODEV;
}
You must not return with a mutex held.
Regards
Oliver
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