On Sat, Nov 23, 2013 at 05:31:34PM +0100, Johannes Thumshirn wrote: > Avoid possible division by zero in led_work, if hdev->maxchild is 0. > > See also: > http://buildbot.llvm.linuxfoundation.org/checker/scan-build-latest/report-b65939.html#EndPath > > Signed-off-by: Johannes Thumshirn <morbidrsa@xxxxxxxxx> > --- > drivers/usb/core/hub.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c > index a7c04e2..8c7aa4e 100644 > --- a/drivers/usb/core/hub.c > +++ b/drivers/usb/core/hub.c > @@ -453,7 +453,8 @@ static void led_work (struct work_struct *work) > unsigned changed = 0; > int cursor = -1; > > - if (hdev->state != USB_STATE_CONFIGURED || hub->quiescing) > + if (hdev->state != USB_STATE_CONFIGURED || hub->quiescing > + || hdev->maxchild == 0) And how can maxchild ever be equal to 0? Look at where it is assigned (it comes from bNbrPorts in the descriptor), in hub_configure() and if it is set to 0, the creation of the structure fails and then this code will never run, right? So I don't think this is needed, and your checker needs to be fixed. sorry, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
