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,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 9039FC433E2 for ; Mon, 8 Jun 2020 23:37:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 64D032068D for ; Mon, 8 Jun 2020 23:37:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591659475; bh=BbxdWGnvVlDQStaBtcIGrsZkW4bEhkfCkN1SYoePdjU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=UZnGa670y0PAp4mCsN9WTH4Va536e9m/72pzExbL7yLOsbBvzcxl60wKJj018aBEn BLZ7Tu+M6ZdtV1wm+xmSoOmv8qCxs68WLD+RuCglMx1SGrwlgoPBdZ8WeVr4nNT54v bMWlkiPfMUuuj3kw5DFadJ+xo5tVAoI+wrOHg2Fk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732221AbgFHX2g (ORCPT ); Mon, 8 Jun 2020 19:28:36 -0400 Received: from mail.kernel.org ([198.145.29.99]:47656 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731369AbgFHXWs (ORCPT ); Mon, 8 Jun 2020 19:22:48 -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 D5E7F20872; Mon, 8 Jun 2020 23:22:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591658568; bh=BbxdWGnvVlDQStaBtcIGrsZkW4bEhkfCkN1SYoePdjU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AB+ZO2bdd6QxE8zSZApCgDq7xa3i99poCVQBZxZYQ0PVwVmX5xo5gaTWeM/j0f0zf qdbXEyMiEsXeItUtcY3fiUPhFhyqxDQVMqHL4eTahQu8+658oT6Fs6XfeJHEjppImj jWmBU6u9FQn7qoI9y8skFgJ3ibGOqmKQJYqYVils= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Mark Starovoytov , "David S . Miller" , Sasha Levin , netdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 008/106] net: atlantic: make hw_get_regs optional Date: Mon, 8 Jun 2020 19:21:00 -0400 Message-Id: <20200608232238.3368589-8-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200608232238.3368589-1-sashal@kernel.org> References: <20200608232238.3368589-1-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: Mark Starovoytov [ Upstream commit d0f23741c202c685447050713907f3be39a985ee ] This patch fixes potential crash in case if hw_get_regs is NULL. Signed-off-by: Mark Starovoytov Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/aquantia/atlantic/aq_nic.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c index 15dcfb6704e5..adac5df0d6b4 100644 --- a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c +++ b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c @@ -620,6 +620,9 @@ int aq_nic_get_regs(struct aq_nic_s *self, struct ethtool_regs *regs, void *p) u32 *regs_buff = p; int err = 0; + if (unlikely(!self->aq_hw_ops->hw_get_regs)) + return -EOPNOTSUPP; + regs->version = 1; err = self->aq_hw_ops->hw_get_regs(self->aq_hw, @@ -634,6 +637,9 @@ int aq_nic_get_regs(struct aq_nic_s *self, struct ethtool_regs *regs, void *p) int aq_nic_get_regs_count(struct aq_nic_s *self) { + if (unlikely(!self->aq_hw_ops->hw_get_regs)) + return 0; + return self->aq_nic_cfg.aq_hw_caps->mac_regs_count; } -- 2.25.1