From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 CBC1F478E27; Sat, 12 Sep 2026 11:38:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789213141; cv=none; b=ZaP7Tp9EDCfuj911q0AFQgpv9byg7sQR0GmaSfYPNbkeIyCVdWxip4OT5NBGZAwr9zqBpF8fh0MW+GVhtmtdAAe/z0NVtxABrirXdxd5stZjbveTpbTjnZ7Xymkvdw+5mORu5Dtumi9XG6FT7kay1TsmgBufVANoXHstu7ubkiI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789213141; c=relaxed/simple; bh=ql3AoE5mdqW5gItiIrE37itUR6fGdut9usbJzgf8yzc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=RBXCzEyYRqBwSW6RnHwkhlJlBNMkkkhFB4aJR9BYQx/IGkFLkNXY1ds/rQGyHTjV+lqL6uMZygbXXmEtpScTY+RDaOcjrjNCMof4iYeb12lkoHCW23dAKKILoCzG1MEloPdBNtO5AgWfSrmPONzcCLtol6wZqMQLzmAQB8slzrI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=p+EC9Yxw; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="p+EC9Yxw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 21BBA1F000FF; Sat, 12 Sep 2026 11:38:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789213137; bh=gYhmtWH9m6W2TshORPYoZPiEzZiwm61awBKZeKNtht8=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=p+EC9YxwIemqUL5A0nWQFczvlColHviX5ZdL921IKcYiMcR/1By1CkfzfMpogiMdt HQcunj0If3N6nppHkRplfb0EfN1HucyqPUvkEuI5/C7jqV2XDgKW5fivBEy/HrX8Nh 9JjCy0RnxPx5dql/gvepl/+ivmMylPJ7klB5tbjA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Frank Li , Koichiro Den , Vinod Koul Subject: [PATCH 6.12 0061/1376] dmaengine: dw-edma: Initialize IRQ data before requesting IRQs Date: Sat, 12 Sep 2026 08:41:27 +0200 Message-ID: <20260912065608.919663083@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065607.535295758@linuxfoundation.org> References: <20260912065607.535295758@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 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Koichiro Den commit 647217abea849d3d45f8cb0b8ee5b78d50f26985 upstream. dw_edma_irq_request() passes struct dw_edma_irq to request_irq() before dw_edma_channel_setup() fills the back pointer. A shared interrupt can therefore enter the handler with dw_irq->dw still NULL, leading to a NULL pointer dereference. Set the back pointer before installing each handler. Fixes: e63d79d1ffcd ("dmaengine: Add Synopsys eDMA IP core driver") Cc: stable@vger.kernel.org Reviewed-by: Frank Li Signed-off-by: Koichiro Den Link: https://patch.msgid.link/20260721062815.4117887-5-den@valinux.co.jp Signed-off-by: Vinod Koul Signed-off-by: Greg Kroah-Hartman --- drivers/dma/dw-edma/dw-edma-core.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/dma/dw-edma/dw-edma-core.c +++ b/drivers/dma/dw-edma/dw-edma-core.c @@ -793,7 +793,6 @@ static int dw_edma_channel_setup(struct else irq->rd_mask |= BIT(chan->id); - irq->dw = dw; memcpy(&chan->msi, &irq->msi, sizeof(chan->msi)); dev_vdbg(dev, "MSI:\t\tChannel %s[%u] addr=0x%.8x%.8x, data=0x%.8x\n", @@ -880,6 +879,7 @@ static int dw_edma_irq_request(struct dw if (chip->nr_irqs == 1) { /* Common IRQ shared among all channels */ irq = chip->ops->irq_vector(dev, 0); + dw->irq[0].dw = dw; err = request_irq(irq, dw_edma_interrupt_common, IRQF_SHARED, dw->name, &dw->irq[0]); if (err) { @@ -905,6 +905,7 @@ static int dw_edma_irq_request(struct dw for (i = 0; i < (*wr_alloc + *rd_alloc); i++) { irq = chip->ops->irq_vector(dev, i); + dw->irq[i].dw = dw; err = request_irq(irq, i < *wr_alloc ? dw_edma_interrupt_write :