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xhci: dbc: Flush queued requests before stopping dbc

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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: dfba2174dc ("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.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mathias Nyman
2025-06-27 17:41:22 +03:00
committed by Greg Kroah-Hartman
parent 897d1170c2
commit 881c927424
1 changed files with 4 additions and 0 deletions
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4
drivers/usb/host/xhci-dbgcap.c
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@@ -639,6 +639,10 @@ static void xhci_dbc_stop(struct xhci_dbc *dbc)
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;