staging: vt6656: return if pControlURB->hcpriv not NULL
Fixes occasional urb submitted while active. Even thought the fMP_CONTROL_WRITES/fMP_CONTROL_READS flags are cleared in the return context urb->hcpriv is not NULL. check for hcpriv and return STATUS_FAILURE if not NULL. Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -118,6 +118,9 @@ int PIPEnsControlOut(struct vnt_private *pDevice, u8 byRequest, u16 wValue,
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if (pDevice->Flags & fMP_CONTROL_READS)
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return STATUS_FAILURE;
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if (pDevice->pControlURB->hcpriv)
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return STATUS_FAILURE;
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MP_SET_FLAG(pDevice, fMP_CONTROL_WRITES);
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pDevice->sUsbCtlRequest.bRequestType = 0x40;
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@ -177,6 +180,9 @@ int PIPEnsControlIn(struct vnt_private *pDevice, u8 byRequest, u16 wValue,
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if (pDevice->Flags & fMP_CONTROL_WRITES)
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return STATUS_FAILURE;
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if (pDevice->pControlURB->hcpriv)
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return STATUS_FAILURE;
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MP_SET_FLAG(pDevice, fMP_CONTROL_READS);
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pDevice->sUsbCtlRequest.bRequestType = 0xC0;
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