From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0AF2BC76196 for ; Fri, 19 Jul 2019 04:14:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D0F3C2189D for ; Fri, 19 Jul 2019 04:14:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563509660; bh=D3EEDM91J3jfhjcd7g60JQOzCfs2T/DHvLLPjJ4oGrY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=VTbzvtiLaa3gMvtzubtHQUJiGSzbArZJdzven1xUvNrvKvnvnqvhXh0RRCKleLpL5 Ddx+CUeAQzeX4fQcRq951XWwIe3pZX2AepeNTRtTlJHUoUm/oAvqi045tNjIZJwn6W 2dpOtDfkOMA3OJd+zt5VZM5ZB/vVpuj1b7La9fSA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389654AbfGSEOT (ORCPT ); Fri, 19 Jul 2019 00:14:19 -0400 Received: from mail.kernel.org ([198.145.29.99]:50324 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388816AbfGSEON (ORCPT ); Fri, 19 Jul 2019 00:14:13 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 695802082F; Fri, 19 Jul 2019 04:14:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563509652; bh=D3EEDM91J3jfhjcd7g60JQOzCfs2T/DHvLLPjJ4oGrY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=2Rg2834M3AaUmqmeHGxBRiESd8TZjvq6K+/8q0qcQXka3gC3RL8xUdwPGqBIv4RTT 4MaOzZsILBzS5OOYITVccl1K+c670k0reMfYLOtru1V0Q4NLrRWnln/DgWEgmzyqIn K61z4wYhuvtcY2ilBUep5yiN3ONo/upyf2Bx2/yo= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: morten petersen , Jassi Brar , Sasha Levin Subject: [PATCH AUTOSEL 4.9 39/45] mailbox: handle failed named mailbox channel request Date: Fri, 19 Jul 2019 00:12:58 -0400 Message-Id: <20190719041304.18849-39-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190719041304.18849-1-sashal@kernel.org> References: <20190719041304.18849-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: morten petersen [ Upstream commit 25777e5784a7b417967460d4fcf9660d05a0c320 ] Previously, if mbox_request_channel_byname was used with a name which did not exist in the "mbox-names" property of a mailbox client, the mailbox corresponding to the last entry in the "mbox-names" list would be incorrectly selected. With this patch, -EINVAL is returned if the named mailbox is not found. Signed-off-by: Morten Borup Petersen Signed-off-by: Jassi Brar Signed-off-by: Sasha Levin --- drivers/mailbox/mailbox.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/mailbox/mailbox.c b/drivers/mailbox/mailbox.c index 87ef465c6947..c1c43800c4aa 100644 --- a/drivers/mailbox/mailbox.c +++ b/drivers/mailbox/mailbox.c @@ -389,11 +389,13 @@ struct mbox_chan *mbox_request_channel_byname(struct mbox_client *cl, of_property_for_each_string(np, "mbox-names", prop, mbox_name) { if (!strncmp(name, mbox_name, strlen(name))) - break; + return mbox_request_channel(cl, index); index++; } - return mbox_request_channel(cl, index); + dev_err(cl->dev, "%s() could not locate channel named \"%s\"\n", + __func__, name); + return ERR_PTR(-EINVAL); } EXPORT_SYMBOL_GPL(mbox_request_channel_byname); -- 2.20.1