linux-kernel - Re: [PATCH] usb: musb: Fix hardware lockup on first Rx endpoint request

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Message-ID: <50361c479af3067031320b19fe650a32bec6d1ba.camel@gmail.com>
Date: Fri, 18 Oct 2024 07:51:54 +0200
From: Hubert Wiśniewski <hubert.wisniewski.25632@...il.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Bin Liu <b-liu@...com>, linux-usb@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] usb: musb: Fix hardware lockup on first Rx endpoint
 request

On Wed, 2024-10-16 at 10:27 +0200, Greg Kroah-Hartman wrote:
> What commit id does this fix?

This does not fix any commit in particular. Bisecting reveals baebdf48c360
("net: dev: Makes sure netif_rx() can be invoked in any context."), but it
did not create the problem, it just exposed it by changing the behaviour of
netif_rx(). Callback could be called from usb_ep_queue() since the very
beginning of the MUSB driver introduced by 550a7375fe72 ("USB: Add MUSB and
TUSB support").