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 E71FF34F48B; Wed, 3 Dec 2025 16:06:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764777975; cv=none; b=SVIujt2dREKvS0EmWbKsgQr/l/U/2OmDARiYoaKFpjH4ZZNzS/WtkXgcLFeqdR+CpO3bKZiGWmovt/2YZqvYlTJg6fPiXkmmFSlqJlNPLALelM8wT1vgVNB90cE8DV+tWsc1ZdfJduI6Kv6SwFRU6Mnu40lsW1o/mVa/vR0Ly0M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764777975; c=relaxed/simple; bh=yZoH58UYrQ99D75+j/+LJYmItUhIwcbXulRMD1d0y9E=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=D+KedI3jiq9J+QNy2vDCzYlBfv+L/R8UOcGSXHdEaO1/ORdDBNMDuTxabrhMO9ax8b6BRBUy8blGdU6eg9CJGVPxXwVR3ubkutkko1w21AoDMWNdbegJsCh+yqJJww/D4Gr2Sg9hIsHQT3GYDEg+KpNP5u58BJFtxkwdbN7fXgI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Oo5/qUF2; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Oo5/qUF2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 55A97C4CEF5; Wed, 3 Dec 2025 16:06:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1764777974; bh=yZoH58UYrQ99D75+j/+LJYmItUhIwcbXulRMD1d0y9E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Oo5/qUF28Hyx76h7uaxV4vKQPrsrZELa6RZTYEwLpgyYlkqRq5g+FNnPqsCEAf7St qpQkB5zjOIDesBkQyp+I4a/bLXx/fBYFxPW0/uSVxz+TFqxT1yUTt1aXN9Tej6l+oT mY0FoOguBqemMACjAWvIjGVI95YcdpG6POaVm6fk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Chen Wang , Manivannan Sadhasivam , Sasha Levin Subject: [PATCH 5.15 171/392] PCI: cadence: Check for the existence of cdns_pcie::ops before using it Date: Wed, 3 Dec 2025 16:25:21 +0100 Message-ID: <20251203152420.371326920@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251203152414.082328008@linuxfoundation.org> References: <20251203152414.082328008@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Chen Wang [ Upstream commit 49a6c160ad4812476f8ae1a8f4ed6d15adfa6c09 ] cdns_pcie::ops might not be populated by all the Cadence glue drivers. This is going to be true for the upcoming Sophgo platform which doesn't set the ops. Hence, add a check to prevent NULL pointer dereference. Signed-off-by: Chen Wang [mani: reworded subject and description] Signed-off-by: Manivannan Sadhasivam Link: https://patch.msgid.link/35182ee1d972dfcd093a964e11205efcebbdc044.1757643388.git.unicorn_wang@outlook.com Signed-off-by: Sasha Levin --- drivers/pci/controller/cadence/pcie-cadence-host.c | 2 +- drivers/pci/controller/cadence/pcie-cadence.c | 4 ++-- drivers/pci/controller/cadence/pcie-cadence.h | 6 +++--- 3 files changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/pci/controller/cadence/pcie-cadence-host.c b/drivers/pci/controller/cadence/pcie-cadence-host.c index c29176bdecd19..28e1497a4fc40 100644 --- a/drivers/pci/controller/cadence/pcie-cadence-host.c +++ b/drivers/pci/controller/cadence/pcie-cadence-host.c @@ -444,7 +444,7 @@ static int cdns_pcie_host_init_address_translation(struct cdns_pcie_rc *rc) cdns_pcie_writel(pcie, CDNS_PCIE_AT_OB_REGION_PCI_ADDR1(0), addr1); cdns_pcie_writel(pcie, CDNS_PCIE_AT_OB_REGION_DESC1(0), desc1); - if (pcie->ops->cpu_addr_fixup) + if (pcie->ops && pcie->ops->cpu_addr_fixup) cpu_addr = pcie->ops->cpu_addr_fixup(pcie, cpu_addr); addr0 = CDNS_PCIE_AT_OB_REGION_CPU_ADDR0_NBITS(12) | diff --git a/drivers/pci/controller/cadence/pcie-cadence.c b/drivers/pci/controller/cadence/pcie-cadence.c index 52767f26048fd..7b4d403569ecd 100644 --- a/drivers/pci/controller/cadence/pcie-cadence.c +++ b/drivers/pci/controller/cadence/pcie-cadence.c @@ -89,7 +89,7 @@ void cdns_pcie_set_outbound_region(struct cdns_pcie *pcie, u8 busnr, u8 fn, cdns_pcie_writel(pcie, CDNS_PCIE_AT_OB_REGION_DESC1(r), desc1); /* Set the CPU address */ - if (pcie->ops->cpu_addr_fixup) + if (pcie->ops && pcie->ops->cpu_addr_fixup) cpu_addr = pcie->ops->cpu_addr_fixup(pcie, cpu_addr); addr0 = CDNS_PCIE_AT_OB_REGION_CPU_ADDR0_NBITS(nbits) | @@ -119,7 +119,7 @@ void cdns_pcie_set_outbound_region_for_normal_msg(struct cdns_pcie *pcie, } /* Set the CPU address */ - if (pcie->ops->cpu_addr_fixup) + if (pcie->ops && pcie->ops->cpu_addr_fixup) cpu_addr = pcie->ops->cpu_addr_fixup(pcie, cpu_addr); addr0 = CDNS_PCIE_AT_OB_REGION_CPU_ADDR0_NBITS(17) | diff --git a/drivers/pci/controller/cadence/pcie-cadence.h b/drivers/pci/controller/cadence/pcie-cadence.h index ef649c807af4e..0ba78a23c3eaa 100644 --- a/drivers/pci/controller/cadence/pcie-cadence.h +++ b/drivers/pci/controller/cadence/pcie-cadence.h @@ -487,7 +487,7 @@ static inline u32 cdns_pcie_ep_fn_readl(struct cdns_pcie *pcie, u8 fn, u32 reg) static inline int cdns_pcie_start_link(struct cdns_pcie *pcie) { - if (pcie->ops->start_link) + if (pcie->ops && pcie->ops->start_link) return pcie->ops->start_link(pcie); return 0; @@ -495,13 +495,13 @@ static inline int cdns_pcie_start_link(struct cdns_pcie *pcie) static inline void cdns_pcie_stop_link(struct cdns_pcie *pcie) { - if (pcie->ops->stop_link) + if (pcie->ops && pcie->ops->stop_link) pcie->ops->stop_link(pcie); } static inline bool cdns_pcie_link_up(struct cdns_pcie *pcie) { - if (pcie->ops->link_up) + if (pcie->ops && pcie->ops->link_up) return pcie->ops->link_up(pcie); return true; -- 2.51.0