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usb: Add missing mtx lock and unlock in pushing dma queue

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Accessing usb_xfer_queue requires bus lock, we added this missing lock
in here to prevent racing issue.

Reviewed by:    adrian
MFC after:      2 weeks
Sponsored by:   The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D57293
This commit is contained in:
ShengYi Hung
2026-05-28 16:42:11 +08:00
parent 9fb5642142
commit df5e9e3da5
1 changed files with 2 additions and 0 deletions
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sys/dev/usb/usb_transfer.c
+2
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@@ -1889,8 +1889,10 @@ usbd_transfer_submit(struct usb_xfer *xfer)
*/
#if USB_HAVE_BUSDMA
if (xfer->flags_int.bdma_enable) {
USB_BUS_LOCK(bus);
/* insert the USB transfer last in the BUS-DMA queue */
usb_command_wrapper(&xfer->xroot->dma_q, xfer);
USB_BUS_UNLOCK(bus);
return;
}
#endif