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usb: mtu3: unmap request DMA on queue failure

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mtu3_gadget_queue() maps the request before checking whether
the QMU GPD ring can accept another transfer. the request is
returned with -EAGAIN before it is linked on the endpoint
request list if mtu3_prepare_transfer() fails.

Normal completion and dequeue paths unmap requests from
mtu3_req_complete(), but this error path never reaches that
helper, so the DMA mapping is left active. Unmap the request
before returning from the failed queue path.

Fixes: df2069acb0 ("usb: Add MediaTek USB3 DRD driver")
Cc: stable <stable@kernel.org>
Signed-off-by: Haoxiang Li <haoxiang_li2024@163.com>
Link: https://patch.msgid.link/20260623093325.2105323-1-haoxiang_li2024@163.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Haoxiang Li
2026-06-23 17:33:25 +08:00
committed by Greg Kroah-Hartman
parent 692c354bef
commit 0bddda5a11
1 changed files with 1 additions and 0 deletions
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1
drivers/usb/mtu3/mtu3_gadget.c
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@@ -305,6 +305,7 @@ static int mtu3_gadget_queue(struct usb_ep *ep,
if (mtu3_prepare_transfer(mep)) {
ret = -EAGAIN;
usb_gadget_unmap_request(&mtu->g, req, mep->is_in);
goto error;
}