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usb: dwc3: gadget: Don't set IMI for no_interrupt

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commit 308c316d16 upstream.

The gadget driver may have a certain expectation of how the request
completion flow should be from to its configuration. Make sure the
controller driver respect that. That is, don't set IMI (Interrupt on
Missed Isoc) when usb_request->no_interrupt is set. Also, the driver
should only set IMI to the last TRB of a chain.

Fixes: 72246da40f ("usb: Introduce DesignWare USB3 DRD Driver")
Cc: stable@vger.kernel.org
Signed-off-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Reviewed-by: Jeff Vanhoof <jdv1029@gmail.com>
Tested-by: Jeff Vanhoof <jdv1029@gmail.com>
Link: https://lore.kernel.org/r/ced336c84434571340c07994e3667a0ee284fefe.1666735451.git.Thinh.Nguyen@synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Thinh Nguyen
2022-10-25 15:10:20 -07:00
committed by Greg Kroah-Hartman
parent fb074d622c
commit e440957f9c
1 changed files with 2 additions and 2 deletions
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4
drivers/usb/dwc3/gadget.c
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@@ -1064,8 +1064,8 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep,
trb->ctrl = DWC3_TRBCTL_ISOCHRONOUS;
}
/* always enable Interrupt on Missed ISOC */
trb->ctrl |= DWC3_TRB_CTRL_ISP_IMI;
if (!no_interrupt && !chain)
trb->ctrl |= DWC3_TRB_CTRL_ISP_IMI;
break;
case USB_ENDPOINT_XFER_BULK: