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usb: dwc3: ep0: sanity check test mode selector 

In case host sends us an unsupported test mode, we
*must* stall this request. This will tell the host
that the selector is invalid and we won't put the
controller in unsupported test modes which could
have undetermined side-effects.

Signed-off-by: Fei Yang <fei.yang@intel.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Fei Yang 2016-04-20 09:08:43 +03:00 committed by Felipe Balbi
parent 818ec3aba8
commit ae41141376
1 changed files with 12 additions and 2 deletions
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14
drivers/usb/dwc3/ep0.c
View File

@ -463,8 +463,18 @@ static int dwc3_ep0_handle_feature(struct dwc3 *dwc,
if (!set)
return -EINVAL;
dwc->test_mode_nr = wIndex >> 8;
dwc->test_mode = true;
switch (wIndex >> 8) {
case TEST_J:
case TEST_K:
case TEST_SE0_NAK:
case TEST_PACKET:
case TEST_FORCE_EN:
dwc->test_mode_nr = wIndex >> 8;
dwc->test_mode = true;
break;
default:
return -EINVAL;
}
break;
default:
return -EINVAL;