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 AA3AF181B9E; Wed, 3 Jul 2024 10:44:07 +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=1720003447; cv=none; b=q4hJelv471YSa2rTUyU/c5Abjgx/3zgnSQCZjOZWyElHotIrDLjOGtTIWR8nHbwYXVfxeGfOJm0E2Cwv0rjJ3qNBCd9IPM5c9PmMiPWYMg9fyjih2pYhhAy1js5mfclnmpuICtJ2WRXqj5s2JRcQo8V2srsRBNmlBzPGUAXmw5w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720003447; c=relaxed/simple; bh=062y4SZy3Nprywq0A4VkYOG15mUbno+sUjWpK9U1Wxc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=DkweiC+10okjjloDAzkHmda4JKdSTAHAVPJqQNVYoAJIsLjtHP+sGmd7PSK/EDTHjWwckBjMi3iByAPfjSVN6aWgX4ABHqRF2DfiRxQlySFBly8z52oBXEJXYNbOkdILeDQx8ZcCPPcShznN1O/50SOFp24rEnQ0j+AT2yJ0zkc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=cwdY6ELw; 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="cwdY6ELw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 26F41C2BD10; Wed, 3 Jul 2024 10:44:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1720003447; bh=062y4SZy3Nprywq0A4VkYOG15mUbno+sUjWpK9U1Wxc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cwdY6ELwp7UHT21LOceb/lYTn4hUDtXv8RubAm9zprkVSMYy6SkpWTjQKDVAiGV+e K3OYfPwiLg1lS6bphKyf4HkD2HyZWOxc4oZTqwfKpsL4R7PfO3rJIcz4lqTaGLU0RR 36lj1YvOl17YEL0BRC86qAml+I7W//cJEIzABfDU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, stable@kernel.org, Nuno Sa , Vinod Koul Subject: [PATCH 4.19 051/139] dmaengine: axi-dmac: fix possible race in remove() Date: Wed, 3 Jul 2024 12:39:08 +0200 Message-ID: <20240703102832.364466972@linuxfoundation.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240703102830.432293640@linuxfoundation.org> References: <20240703102830.432293640@linuxfoundation.org> User-Agent: quilt/0.67 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 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Nuno Sa commit 1bc31444209c8efae98cb78818131950d9a6f4d6 upstream. We need to first free the IRQ before calling of_dma_controller_free(). Otherwise we could get an interrupt and schedule a tasklet while removing the DMA controller. Fixes: 0e3b67b348b8 ("dmaengine: Add support for the Analog Devices AXI-DMAC DMA controller") Cc: stable@kernel.org Signed-off-by: Nuno Sa Link: https://lore.kernel.org/r/20240328-axi-dmac-devm-probe-v3-1-523c0176df70@analog.com Signed-off-by: Vinod Koul Signed-off-by: Greg Kroah-Hartman --- drivers/dma/dma-axi-dmac.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/dma/dma-axi-dmac.c +++ b/drivers/dma/dma-axi-dmac.c @@ -710,8 +710,8 @@ static int axi_dmac_remove(struct platfo { struct axi_dmac *dmac = platform_get_drvdata(pdev); - of_dma_controller_free(pdev->dev.of_node); free_irq(dmac->irq, dmac); + of_dma_controller_free(pdev->dev.of_node); tasklet_kill(&dmac->chan.vchan.task); dma_async_device_unregister(&dmac->dma_dev); clk_disable_unprepare(dmac->clk);