On 06/09/2015 03:50 PM, Cyril Hrubis wrote:
<cut>
>
>
> I think that we should do:
>
> detach_device(..)
> {
> while EBUSY:
> ioctl(fd, LOOP_CLR_FD);
>
> while not error:
> ioclt(LOOP_GET_STATUS);
> usleep();
> }
>
> Because if we ignore the return value from LOOP_CLR_FD we will break on
> older kernels where we may get EBUSSY instead of lazy detach. And the
> LOOP_GET_STATUS* ioctls should return error when device is not attached,
> at least if I'm reading kernel code right.
>
>
I've just sent a patch for detach_device. It turned out that
LOOP_GET_STATUS is redundant here, we can control this situation via
LOOP_CLR_FD + ENXIO.
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