The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y git checkout FETCH_HEAD git cherry-pick -x efe3e3ae5a66cb38ef29c909e951b4039044bae9 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2025070847-wooing-headway-a75d@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^..

Possible dependencies:

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From efe3e3ae5a66cb38ef29c909e951b4039044bae9 Mon Sep 17 00:00:00 2001 From: Mathias Nyman mathias.nyman@linux.intel.com Date: Fri, 27 Jun 2025 17:41:22 +0300 Subject: [PATCH] xhci: dbc: Flush queued requests before stopping dbc

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

diff --git a/drivers/usb/host/xhci-dbgcap.c b/drivers/usb/host/xhci-dbgcap.c index 0d4ce5734165..06a2edb9e86e 100644 --- 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_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;