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usb: xhci: Recover from halted bulk endpoints

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There is currently no codepath to recover from this case. In principle
we could require that the upper layer do this explicitly, but let's just
do it in xHCI when the next bulk transfer is started, since that
reasonably implies whatever caused the problem has been dealt with.

Signed-off-by: Hector Martin <marcan@marcan.st>
Reviewed-by: Marek Vasut <marex@denx.de>
This commit is contained in:
Hector Martin 2023-10-29 15:37:41 +09:00 committed by Marek Vasut
parent 6f64f0ae23
commit 9d88bd4dcf
1 changed files with 8 additions and 0 deletions
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8
drivers/usb/host/xhci-ring.c
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@ -671,6 +671,14 @@ int xhci_bulk_tx(struct usb_device *udev, unsigned long pipe,
ep_ctx = xhci_get_ep_ctx(ctrl, virt_dev->out_ctx, ep_index);
/*
* If the endpoint was halted due to a prior error, resume it before
* the next transfer. It is the responsibility of the upper layer to
* have dealt with whatever caused the error.
*/
if ((le32_to_cpu(ep_ctx->ep_info) & EP_STATE_MASK) == EP_STATE_HALTED)
reset_ep(udev, ep_index);
ring = virt_dev->eps[ep_index].ring;
/*
* How much data is (potentially) left before the 64KB boundary?