usb: dwc2: hcd: Fix host channel halt flow
[ Upstream commit a82c7abdf8
]
According databook in Buffer and External DMA mode
non-split periodic channels can't be halted.
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Minas Harutyunyan <hminas@synopsys.com>
Signed-off-by: Grigor Tovmasyan <tovmasya@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -979,6 +979,24 @@ void dwc2_hc_halt(struct dwc2_hsotg *hsotg, struct dwc2_host_chan *chan,
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if (dbg_hc(chan))
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dev_vdbg(hsotg->dev, "%s()\n", __func__);
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/*
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* In buffer DMA or external DMA mode channel can't be halted
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* for non-split periodic channels. At the end of the next
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* uframe/frame (in the worst case), the core generates a channel
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* halted and disables the channel automatically.
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*/
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if ((hsotg->params.g_dma && !hsotg->params.g_dma_desc) ||
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hsotg->hw_params.arch == GHWCFG2_EXT_DMA_ARCH) {
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if (!chan->do_split &&
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(chan->ep_type == USB_ENDPOINT_XFER_ISOC ||
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chan->ep_type == USB_ENDPOINT_XFER_INT)) {
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dev_err(hsotg->dev, "%s() Channel can't be halted\n",
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__func__);
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return;
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}
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}
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if (halt_status == DWC2_HC_XFER_NO_HALT_STATUS)
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dev_err(hsotg->dev, "!!! halt_status = %d !!!\n", halt_status);
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