Messages in this thread | | | Date | Wed, 1 Oct 2008 23:12:16 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH] Input: add mmio xi driver |
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> On Thu, 25 Sep 2008 16:22:37 -0700 Greg KH <gregkh@suse.de> wrote: > > From: Greg Kroah-Hartman <gregkh@suse.de>
Is this true?
> This patch adds the Mimio Xi interactive whiteboard driver to the tree. > > It was originally written by mwilder@cs.nmsu.edu, but cleaned up and > forward ported by me to the latest kernel version.
Oh. Tricky.
> > ... > > +#define isvalidtxsize(n) ((n) > 0 && (n) <= MIMIO_MAXPAYLOAD)
grumble.
- should be written in C
- buggy when passed expresion-with-side-effects.
> > ... > > +static DECLARE_MUTEX(disconnect_sem);
ooh, a semaphore - I remember them.
checkpatch used to warn about newly-added semaphores but a) it broke and b) this patch doesn't seem to have met checkpatch.
> > ... > > +static int mimio_greet(struct mimio *mimio) > +{ > + const struct grtpkt { > + int nbytes; > + unsigned delay; > + char data[8]; > + } grtpkts[] = { > + { 3, 0, { 0x11, 0x55, 0x44, 0x00, 0x00, 0x00, 0x00, 0x00 } }, > + { 5, 0, { 0x53, 0x55, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00 } }, > + { 5, 0, { 0x43, 0x55, 0x00, 0x00, 0x16, 0x00, 0x00, 0x00 } }, > + { 5, 0, { 0x33, 0x55, 0x00, 0x00, 0x66, 0x00, 0x00, 0x00 } }, > + { 5, 0, { 0x13, 0x00, 0x5e, 0x02, 0x4f, 0x00, 0x00, 0x00 } }, > + { 5, 0, { 0x13, 0x00, 0x04, 0x03, 0x14, 0x00, 0x00, 0x00 } }, > + { 5, 2, { 0x13, 0x00, 0x00, 0x04, 0x17, 0x00, 0x00, 0x00 } }, > + { 5, 0, { 0x13, 0x00, 0x0d, 0x08, 0x16, 0x00, 0x00, 0x00 } }, > + { 5, 0, { 0x13, 0x00, 0x4d, 0x01, 0x5f, 0x00, 0x00, 0x00 } }, > + { 3, 0, { 0xf1, 0x55, 0xa4, 0x00, 0x00, 0x00, 0x00, 0x00 } }, > + { 7, 2, { 0x52, 0x55, 0x00, 0x07, 0x31, 0x55, 0x64, 0x00 } }, > + { 0, 0, { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } }, > + };
I believe that gcc does the right thing here, but an explict `static' would set minds at ease.
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