[alsa-devel] SB16 build error.
ralf at linux-mips.org
Thu Jun 30 14:43:33 CEST 2011
On Thu, Jun 30, 2011 at 02:38:20PM +0200, Takashi Iwai wrote:
> > In userland an empty definition will be used for _IOC_TYPECHECK so there
> > won't be an error. So userland already is already using the existing
> > value for SNDRV_SB_CSP_IOCTL_LOAD_CODE ...
> Right. It has an invalid direction (3), but apps won't care such
> details anyway.
> > With a crude hack like
> > #define SNDRV_SB_CSP_IOCTL_LOAD_CODE \
> > _IOC(_IOC_WRITE,'H', 0x11, sizeof(struct snd_sb_csp_microcode))
> > error checking can be bypassed and all will be fine as long as the
> > resulting value doesn't result in in a a duplicate case value - which it
> > doesn't, at least not in my testing.
> > Should work but isn't nice.
> Indeed. But which is uglier is hard to answer :)
> If you are fine with the hacked ioctl number above, I can put it
> with some comments. This won't break anything, at least.
Go ahead then and yes, this really deserves a comment.
More information about the Alsa-devel