> > +
> > + /* Only one open per device at a time */
> > + if (!atomic_dec_and_test(&rsmu->open_count)) {
> > + atomic_inc(&rsmu->open_count);
> > + return -EBUSY;
>
> This does not do what you think it does, and does not prevent multiple
> applications from talking to your device at the same time.
>
> There is no need for this at all, as it does not work, sorry. If multiple
> apps
> talk to your device, it's their fault, not the kernel's fault, that things go
> wrong.
>
> And I thought that Arnd already told you to fix this?
>
Hi Greg
Sorry for not replying to the list, I am new so not very familiar with the
process.
Can you elaborate why it doesn't work? I kind of borrow the idea from
xilinx_sdfec.c and I don't see why it doesn't work.
I mean if an application failed at opening the device, how can it proceed to
talk the device without a file descriptor?
Thanks
Min
