If no valid CHID value has previously been set on an HWA, writing a 
value of all zeros will cause a kernel panic in uwb_radio_stop because 
wusbhc->uwb_rc has not been set.  This patch skips the call to 
uwb_radio_stop if wusbhc->uwb_rc has not been initialized.

Signed-off-by: Thomas Pugliese <thomas.pugli...@gmail.com>
---
 drivers/usb/wusbcore/mmc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/wusbcore/mmc.c b/drivers/usb/wusbcore/mmc.c
index 4474126..3f485df 100644
--- a/drivers/usb/wusbcore/mmc.c
+++ b/drivers/usb/wusbcore/mmc.c
@@ -301,7 +301,7 @@ int wusbhc_chid_set(struct wusbhc *wusbhc, const struct 
wusb_ckhdid *chid)
 
        if (chid)
                result = uwb_radio_start(&wusbhc->pal);
-       else
+       else if (wusbhc->uwb_rc)
                uwb_radio_stop(&wusbhc->pal);
 
        return result;
-- 
1.8.3.2

--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Reply via email to