Re: [PATCH v2 0/8] lsusb: Add initial support for USB Audio Class 3

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On Thu, Dec 07, 2017 at 04:00:36PM +0100, Greg KH wrote:
> On Thu, Dec 07, 2017 at 10:26:21AM +0000, Michael Drake wrote:
> > This adds a new way of dumping descriptors, which splits the knowledge
> > of how to interpret descriptor data from the actual dumping. This has
> > two advantages:
> > 
> > 1. It is easy to add support for new descriptors, since they are now
> >    simple definitions that resemble the tables in the USB specifications.
> > 
> > 2. The code for dumping descriptors is common, so the output is easy to
> >    keep consistent. It is also consistent and thorough in its handling
> >    of insufficient descriptor data buffer, and junk data at the end of
> >    a descriptor.
> > 
> > UAC1 and UAC2 are converted to use the new mechanism, initial support
> > for UAC3 is added.  Finally, support for the USB3 BOS Configuration
> > Summary Descriptor is added.
> > 
> > This was previously opened as a github pull request here:
> > 
> >     https://github.com/gregkh/usbutils/pull/61
> 
> Thanks for this, all of the patches are now applied.
> 
> There were some intermediate build warnings, but future patches in the
> series fixed that up, next time be more careful, each patch should be
> "clean".
> 
> However the build now gets the following warnings:
> 
>   CC       lsusb-lsusb.o
> lsusb.c:220:12: warning: ‘get_audioterminal_string’ defined but not used [-Wunused-function]
>  static int get_audioterminal_string(char *buf, size_t size, u_int16_t termt)
>             ^~~~~~~~~~~~~~~~~~~~~~~~
>   CC       lsusb-lsusb-t.o
>   CC       lsusb-desc-defs.o
>   CC       lsusb-desc-dump.o
> desc-dump.c: In function ‘desc_bmcontrol_dump’:
> desc-dump.c:67:18: warning: comparison between pointer and zero character constant [-Wpointer-compare]
>    if (strings[0] != '\0') {
>                   ^~
> desc-dump.c:67:7: note: did you mean to dereference the pointer?
>    if (strings[0] != '\0') {
>        ^
>   CC       lsusb-names.o
> 
> 
> Can you fix this up and send a patch for them?

Oops, I should have tested the code, it now crashes for me with the
following error:
	Floating point exception (core dumped)

Do you see this as well?

thanks,

greg k-h
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