From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E1EBF168C5 for ; Mon, 8 May 2023 10:54:01 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 23D78C433EF; Mon, 8 May 2023 10:54:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1683543241; bh=ka65zs60x+QSe9eH/Rob1ZLl2kjLhdUvHSAhUNgccDc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=0Y3rB5/vlzZoy9ckRdm2c81iupj7LGBA+y8a6byDFO23viWFl5BtshqDvUwkuxVSr 5B7vbzWvDgmop8Va8yAl1ThMYsgladUxQzoD/zFPWgzi5hfBF9cSRYOOFzJRQsJUCD x18S66j+XpbnF2EVccIU/ngC4ipPfdaQeOu+uMnI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Johan Hovold Subject: [PATCH 6.3 028/694] xhci: fix debugfs register accesses while suspended Date: Mon, 8 May 2023 11:37:43 +0200 Message-Id: <20230508094433.561808349@linuxfoundation.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230508094432.603705160@linuxfoundation.org> References: <20230508094432.603705160@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Johan Hovold commit 735baf1b23458f71a8b15cb924af22c9ff9cd125 upstream. Wire up the debugfs regset device pointer so that the controller is resumed before accessing registers to avoid crashing or locking up if it happens to be runtime suspended. Fixes: 02b6fdc2a153 ("usb: xhci: Add debugfs interface for xHCI driver") Cc: stable@vger.kernel.org # 4.15: 30332eeefec8: debugfs: regset32: Add Runtime PM support Cc: stable@vger.kernel.org # 4.15 Signed-off-by: Johan Hovold Link: https://lore.kernel.org/r/20230405090342.7363-1-johan+linaro@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-debugfs.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/usb/host/xhci-debugfs.c +++ b/drivers/usb/host/xhci-debugfs.c @@ -133,6 +133,7 @@ static void xhci_debugfs_regset(struct x regset->regs = regs; regset->nregs = nregs; regset->base = hcd->regs + base; + regset->dev = hcd->self.controller; debugfs_create_regset32((const char *)rgs->name, 0444, parent, regset); }