[alsa-devel] [PATCH 2/4] ALSA: seq: add an alternative way to handle ioctl requests

[Clemens Ladisch]

Takashi Sakamoto wrote:
> +	if (_IOC_DIR(handler->cmd) == IOC_IN) {
> ...
> +		    _IOC_DIR(handler->cmd) == IOC_OUT)

_IOC_DIR() returns a bit mask in which both _IOC_READ and _IOC_WRITE can
be set.  IOC_IN, IOC_OUT, and IOC_INOUT are shifted values.
(see include/uapi/asm-generic/ioctl.h)


Regards,
Clemens