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 6345E322740; Wed, 21 Jan 2026 18:19:37 +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=1769019578; cv=none; b=E3M3X3qRHbbMxI5WWcglKwflkDvOwxFq3HImycJw8E7tN6KiG5bns7vnIb51LSXAYqiE89Q0J3ap6J3KUvu+9W7okIjF4xRarMxr2pClhC3alooETlvq/jTSESxfRVXeX5e0vEr6SkVZF6LTKQvINty9+AMtpwCrf/JdCKfUjpI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769019578; c=relaxed/simple; bh=UPNnDTwAIV3v1RaFjEHmqDm46xBGeP3XJLGX5sC4ng8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=LcOLWv//yEat6wbezdk3A1SrH+J/uyT52pamNFjT8gecgMMzdG4AnF/Qf54/T4Ac80ApjHwHlObVUiKTODLbLfFVf+WhA2RvaojSbAwvOK8JPBy9jjMA+Y3OlxecP+94+tpF/OEr2sYvuW8fh7bVq4d7GhCbMacl0kC/wEV8fYI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=GWcMZFtp; 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="GWcMZFtp" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 02530C4CEF1; Wed, 21 Jan 2026 18:19:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1769019577; bh=UPNnDTwAIV3v1RaFjEHmqDm46xBGeP3XJLGX5sC4ng8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GWcMZFtpMpVmXAblHXWST4YF2wO9cekrVNm+FjXO1O/d/0hdT0FR/GGkzqO7Nnl+i Oz4qBV4MCeUCIms+qBAGZWUYMWquEMve8QFgM226a/g1mf5SzIfDa/cDjNEbKJ7kX/ KRMoobBalxMY40o+yKos7cDYW7qiZ6w3A7qiR4ao= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Suraj Gupta , Radhey Shyam Pandey , Folker Schwesinger , Vinod Koul , Sasha Levin Subject: [PATCH 6.12 046/139] dmaengine: xilinx_dma: Fix uninitialized addr_width when "xlnx,addrwidth" property is missing Date: Wed, 21 Jan 2026 19:14:54 +0100 Message-ID: <20260121181413.111686821@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260121181411.452263583@linuxfoundation.org> References: <20260121181411.452263583@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Suraj Gupta [ Upstream commit c0732fe78728718c853ef8e7af5bbb05262acbd1 ] When device tree lacks optional "xlnx,addrwidth" property, the addr_width variable remained uninitialized with garbage values, causing incorrect DMA mask configuration and subsequent probe failure. The fix ensures a fallback to the default 32-bit address width when this property is missing. Signed-off-by: Suraj Gupta Fixes: b72db4005fe4 ("dmaengine: vdma: Add 64 bit addressing support to the driver") Reviewed-by: Radhey Shyam Pandey Reviewed-by: Folker Schwesinger Link: https://patch.msgid.link/20251021183006.3434495-1-suraj.gupta2@amd.com Signed-off-by: Vinod Koul Signed-off-by: Sasha Levin --- drivers/dma/xilinx/xilinx_dma.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c index aa59b62cd83fb..3ad37e9b924a7 100644 --- a/drivers/dma/xilinx/xilinx_dma.c +++ b/drivers/dma/xilinx/xilinx_dma.c @@ -130,6 +130,7 @@ #define XILINX_MCDMA_MAX_CHANS_PER_DEVICE 0x20 #define XILINX_DMA_MAX_CHANS_PER_DEVICE 0x2 #define XILINX_CDMA_MAX_CHANS_PER_DEVICE 0x1 +#define XILINX_DMA_DFAULT_ADDRWIDTH 0x20 #define XILINX_DMA_DMAXR_ALL_IRQ_MASK \ (XILINX_DMA_DMASR_FRM_CNT_IRQ | \ @@ -3063,7 +3064,7 @@ static int xilinx_dma_probe(struct platform_device *pdev) struct device_node *node = pdev->dev.of_node; struct xilinx_dma_device *xdev; struct device_node *child, *np = pdev->dev.of_node; - u32 num_frames, addr_width, len_width; + u32 num_frames, addr_width = XILINX_DMA_DFAULT_ADDRWIDTH, len_width; int i, err; /* Allocate and initialize the DMA engine structure */ @@ -3137,7 +3138,9 @@ static int xilinx_dma_probe(struct platform_device *pdev) err = of_property_read_u32(node, "xlnx,addrwidth", &addr_width); if (err < 0) - dev_warn(xdev->dev, "missing xlnx,addrwidth property\n"); + dev_warn(xdev->dev, + "missing xlnx,addrwidth property, using default value %d\n", + XILINX_DMA_DFAULT_ADDRWIDTH); if (addr_width > 32) xdev->ext_addr = true; -- 2.51.0