提交 5825233b 编写于 作者: T Thinh Nguyen 提交者: Lipeng Sang

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

stable inclusion
from stable-v5.10.153
commit e440957f9c8bedae784f718c42207af222c25818
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I64YCA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=e440957f9c8bedae784f718c42207af222c25818

--------------------------------

commit 308c316d 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: 72246da4 ("usb: Introduce DesignWare USB3 DRD Driver")
Cc: stable@vger.kernel.org
Signed-off-by: NThinh Nguyen <Thinh.Nguyen@synopsys.com>
Reviewed-by: NJeff Vanhoof <jdv1029@gmail.com>
Tested-by: NJeff Vanhoof <jdv1029@gmail.com>
Link: https://lore.kernel.org/r/ced336c84434571340c07994e3667a0ee284fefe.1666735451.git.Thinh.Nguyen@synopsys.comSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NLipeng Sang <sanglipeng1@jd.com>
上级 d3fc92b5
......@@ -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:
......
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