From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:39256 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932727AbdJXNAT (ORCPT ); Tue, 24 Oct 2017 09:00:19 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jonathan Liu , Bin Liu Subject: [PATCH 4.4 09/27] usb: musb: sunxi: Explicitly release USB PHY on exit Date: Tue, 24 Oct 2017 14:57:54 +0200 Message-Id: <20171024125711.453949425@linuxfoundation.org> In-Reply-To: <20171024125711.074929246@linuxfoundation.org> References: <20171024125711.074929246@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org List-ID: 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jonathan Liu commit 6ed05c68cbcae42cd52b8e53b66952bfa9c002ce upstream. This fixes a kernel oops when unloading the driver due to usb_put_phy being called after usb_phy_generic_unregister when the device is detached. Calling usb_phy_generic_unregister causes x->dev->driver to be NULL in usb_put_phy and results in a NULL pointer dereference. Signed-off-by: Jonathan Liu Signed-off-by: Bin Liu Signed-off-by: Greg Kroah-Hartman --- drivers/usb/musb/sunxi.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/usb/musb/sunxi.c +++ b/drivers/usb/musb/sunxi.c @@ -320,6 +320,8 @@ static int sunxi_musb_exit(struct musb * if (test_bit(SUNXI_MUSB_FL_HAS_SRAM, &glue->flags)) sunxi_sram_release(musb->controller->parent); + devm_usb_put_phy(glue->dev, glue->xceiv); + return 0; }