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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 E4A01C433E0 for ; Fri, 19 Jun 2020 16:12:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BC18D21527 for ; Fri, 19 Jun 2020 16:12:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592583127; bh=s4rkVUYjCfuB21bGlUbTs4ryKSA+p9BFofT562MSvhU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=jD9KBxzAj0FHGOdmlZdtHfRTMdaun3oaMu2JSVXQ+Fbm1fz/Dx1zNA7+dwMdlDyjI Oa5NVJaBXs/u4ijhesWtlM9DpDHvmzmJ9KNLguQsyvQFcK3vOE+/AmSq6BzP8d5c8O vfNxA/Q+eZgqz8KoLR+liacjAHDwYWGyJcEPond4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404257AbgFSQMF (ORCPT ); Fri, 19 Jun 2020 12:12:05 -0400 Received: from mail.kernel.org ([198.145.29.99]:34364 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391299AbgFSPF1 (ORCPT ); Fri, 19 Jun 2020 11:05:27 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 6BB0721974; Fri, 19 Jun 2020 15:05:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592579127; bh=s4rkVUYjCfuB21bGlUbTs4ryKSA+p9BFofT562MSvhU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=imcu0FZZRxoZnaN59RpFdhg0jywpzpE3DEF7Z1LRg4LbkFbcbgmkKbXFmlQv2Gngy yjmLbx8LhS5ZLoic/4RinUXOe7fU2r6ZKGAJzxZ7+HWUkqDTWbcXaNf8GsF1bXIJv+ +LdoW6O6jJhNFumGjwJqxH4siLhsfAzenyXnD36Q= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Mark Starovoytov , "David S. Miller" , Sasha Levin Subject: [PATCH 5.4 018/261] net: atlantic: make hw_get_regs optional Date: Fri, 19 Jun 2020 16:30:29 +0200 Message-Id: <20200619141650.739339000@linuxfoundation.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200619141649.878808811@linuxfoundation.org> References: <20200619141649.878808811@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 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 12949f1ec1ea..145334fb18f4 100644 --- a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c +++ b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c @@ -690,6 +690,9 @@ 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, @@ -704,6 +707,9 @@ err_exit: 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