FAILED: patch "[PATCH] usb: dwc3: gadget: Clear ep descriptor last" failed to apply to 5.15-stable tree

[<gregkh@linuxfoundation.org>]

The patch below does not apply to the 5.15-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>.

Possible dependencies:

f90f5afd5083 ("usb: dwc3: gadget: Clear ep descriptor last")
ffb9da4a04c6 ("usb: dwc3: gadget: Return -ESHUTDOWN on ep disable")
b44c0e7fef51 ("usb: dwc3: gadget: conditionally remove requests")

thanks,

greg k-h

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

From f90f5afd5083a7cb4aee13bd4cc0ae600bd381ca Mon Sep 17 00:00:00 2001
From: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Date: Tue, 15 Nov 2022 17:19:43 -0800
Subject: [PATCH] usb: dwc3: gadget: Clear ep descriptor last

Until the endpoint is disabled, its descriptors should remain valid.
When its requests are removed from ep disable, the request completion
routine may attempt to access the endpoint's descriptor. Don't clear the
descriptors before that.

Fixes: f09ddcfcb8c5 ("usb: dwc3: gadget: Prevent EP queuing while stopping transfers")
Cc: stable@vger.kernel.org
Signed-off-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/45db7c83b209259115bf652af210f8b2b3b1a383.1668561364.git.Thinh.Nguyen@synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 8b4cfa07539d..6d524fa76443 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1024,12 +1024,6 @@ static int __dwc3_gadget_ep_disable(struct dwc3_ep *dep)
 	reg &= ~DWC3_DALEPENA_EP(dep->number);
 	dwc3_writel(dwc->regs, DWC3_DALEPENA, reg);
 
-	/* Clear out the ep descriptors for non-ep0 */
-	if (dep->number > 1) {
-		dep->endpoint.comp_desc = NULL;
-		dep->endpoint.desc = NULL;
-	}
-
 	dwc3_remove_requests(dwc, dep, -ESHUTDOWN);
 
 	dep->stream_capable = false;
@@ -1044,6 +1038,12 @@ static int __dwc3_gadget_ep_disable(struct dwc3_ep *dep)
 		mask |= (DWC3_EP_DELAY_STOP | DWC3_EP_TRANSFER_STARTED);
 	dep->flags &= mask;
 
+	/* Clear out the ep descriptors for non-ep0 */
+	if (dep->number > 1) {
+		dep->endpoint.comp_desc = NULL;
+		dep->endpoint.desc = NULL;
+	}
+
 	return 0;
 }