6.15-stable review patch. If anyone has any objections, please let me know.
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From: Mathias Nyman mathias.nyman@linux.intel.com
commit efe3e3ae5a66cb38ef29c909e951b4039044bae9 upstream.
Flush dbc requests when dbc is stopped and transfer rings are freed. Failure to flush them lead to leaking memory and dbc completing odd requests after resuming from suspend, leading to error messages such as:
[ 95.344392] xhci_hcd 0000:00:0d.0: no matched request
Cc: stable stable@kernel.org Fixes: dfba2174dc42 ("usb: xhci: Add DbC support in xHCI driver") Signed-off-by: Mathias Nyman mathias.nyman@linux.intel.com Link: https://lore.kernel.org/r/20250627144127.3889714-5-mathias.nyman@linux.intel... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/host/xhci-dbgcap.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/drivers/usb/host/xhci-dbgcap.c +++ b/drivers/usb/host/xhci-dbgcap.c @@ -652,6 +652,10 @@ static void xhci_dbc_stop(struct xhci_db case DS_DISABLED: return; case DS_CONFIGURED: + spin_lock(&dbc->lock); + xhci_dbc_flush_requests(dbc); + spin_unlock(&dbc->lock); + if (dbc->driver->disconnect) dbc->driver->disconnect(dbc); break;