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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>
This commit is contained in:
Malcolm Priestley 2013-10-14 19:44:13 +01:00 committed by Greg Kroah-Hartman
parent 60cc27472c
commit e1feda132f
1 changed files with 6 additions and 0 deletions
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6
drivers/staging/vt6656/usbpipe.c
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@ -118,6 +118,9 @@ int PIPEnsControlOut(struct vnt_private *pDevice, u8 byRequest, u16 wValue,
if (pDevice->Flags & fMP_CONTROL_READS)
return STATUS_FAILURE;
if (pDevice->pControlURB->hcpriv)
return STATUS_FAILURE;
MP_SET_FLAG(pDevice, fMP_CONTROL_WRITES);
pDevice->sUsbCtlRequest.bRequestType = 0x40;
@ -177,6 +180,9 @@ int PIPEnsControlIn(struct vnt_private *pDevice, u8 byRequest, u16 wValue,
if (pDevice->Flags & fMP_CONTROL_WRITES)
return STATUS_FAILURE;
if (pDevice->pControlURB->hcpriv)
return STATUS_FAILURE;
MP_SET_FLAG(pDevice, fMP_CONTROL_READS);
pDevice->sUsbCtlRequest.bRequestType = 0xC0;