Re: [GIT PULL] USB / Thunderbolt driver changes for 6.0-rc1

[Krishna Kurapati PSSNV]

On 8/3/2022 9:20 PM, Greg KH wrote:
> On Wed, Aug 03, 2022 at 08:43:49AM -0700, Nathan Chancellor wrote:
> > On Wed, Aug 03, 2022 at 04:10:26PM +0200, Greg KH wrote:
> > > Andrey Strachuk (1):
> > >        usb: cdns3: change place of 'priv_ep' assignment in cdns3_gadget_ep_dequeue(), cdns3_gadget_ep_enable()
> > For the record, this breaks allmodconfig with clang (I haven't seen a
> > formal report on it anywhere and this missed -next coverage because
> > Stephen is on vacation):
> >
> >      drivers/usb/cdns3/cdns3-gadget.c:2290:11: error: variable 'priv_dev' is uninitialized when used here [-Werror,-Wuninitialized]
> >                      dev_dbg(priv_dev->dev, "usbss: invalid parameters\n");
> >                              ^~~~~~~~
> >      include/linux/dev_printk.h:155:18: note: expanded from macro 'dev_dbg'
> >              dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
> >                              ^~~
> >      include/linux/dynamic_debug.h:167:7: note: expanded from macro 'dynamic_dev_dbg'
> >                              dev, fmt, ##__VA_ARGS__)
> >                              ^~~
> >      include/linux/dynamic_debug.h:152:56: note: expanded from macro '_dynamic_func_call'
> >              __dynamic_func_call(__UNIQUE_ID(ddebug), fmt, func, ##__VA_ARGS__)
> >                                                                  ^~~~~~~~~~~
> >      include/linux/dynamic_debug.h:134:15: note: expanded from macro '__dynamic_func_call'
> >                      func(&id, ##__VA_ARGS__);               \
> >                                  ^~~~~~~~~~~
> >      drivers/usb/cdns3/cdns3-gadget.c:2278:31: note: initialize the variable 'priv_dev' to silence this warning
> >              struct cdns3_device *priv_dev;
> >                                          ^
> >                                          = NULL
> >      1 error generated.
> >
> > I know you don't take patches during the merge window, so I guess we'll
> > just have to have x86_64 allmodconfig be broken with clang for -rc1? :/
> I can send fix-up patches that break the build before -rc1 if you have
> it.  Also you can send it and Linus can pick it up directly if it breaks
> his workflow.
>
> Odd that this was never reported, 0-day didn't even say anything?
>
> thanks,
>
> greg k-h
Hi Greg,
  On a similar note. There was another issue reported in which 
randconfig for i386 build breaks as usb_hub_find_child API is not 
present as usbcore isn't compiled in that config (CONFIG_USB isn't set).
Patch to fix has been pushed recently and is in review:
https://lore.kernel.org/linux-usb/1659337215-20421-1-git-send-email-quic_kriskura@xxxxxxxxxxx/

Would it be possible to pick it up in rc1 to make sure nothing breaks 
further because of it.
I can respin patch if something is off in it.

Regards,
Krishna,