From patchwork Mon Sep 9 13:28:09 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jinjie Ruan X-Patchwork-Id: 826879 Received: from szxga05-in.huawei.com (szxga05-in.huawei.com [45.249.212.191]) (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 DEFBB1B86D5; Mon, 9 Sep 2024 13:19:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.191 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725887960; cv=none; b=aaGdAEfvMZ/Fb7K62TNGaZLDWGpC8rwseT0YvWW/z8dgBkRgvjNMs3EN+j99+ku3RuxWOPj+FHzHlcb67DTTpiv8MExCXFPi/kxWREE8CQAUjYcZ9Y3eabstax+ywhIS36aQGKSECOUK97eOo2NwJLjrOQOAnmMSspWLv2A15Rg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725887960; c=relaxed/simple; bh=Ki5WA5qqiVF0X1eLtzA8aZ66vWvjlkyfsoxjR89nSRA=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=DLZCibopU+18Ofr7mXd19YZ0PwpEIIkPtoGdGp+oaXfxHV/VL94hDbjpfOo7AgXVf20C+VM0UH8WqgqEdpjZi9WibACA8CmOC+gqNfajZ9RHg8SjzIAxfwQDqZC15Knn8Q4bfkPn5ncnk3XPZI1Hp+NT4bHuVL2oX504JJngUdg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=45.249.212.191 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.19.88.163]) by szxga05-in.huawei.com (SkyGuard) with ESMTP id 4X2S4v1hRfz1HJPn; Mon, 9 Sep 2024 21:15:43 +0800 (CST) Received: from kwepemh500013.china.huawei.com (unknown [7.202.181.146]) by mail.maildlp.com (Postfix) with ESMTPS id 4CF64180041; Mon, 9 Sep 2024 21:19:16 +0800 (CST) Received: from huawei.com (10.90.53.73) by kwepemh500013.china.huawei.com (7.202.181.146) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Mon, 9 Sep 2024 21:19:15 +0800 From: Jinjie Ruan To: , , , , , , CC: Subject: [PATCH v4 2/3] spi: geni-qcom: Fix incorrect free_irq() sequence Date: Mon, 9 Sep 2024 21:28:09 +0800 Message-ID: <20240909132810.1296786-3-ruanjinjie@huawei.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240909132810.1296786-1-ruanjinjie@huawei.com> References: <20240909132810.1296786-1-ruanjinjie@huawei.com> Precedence: bulk X-Mailing-List: linux-spi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To kwepemh500013.china.huawei.com (7.202.181.146) In spi_geni_remove(), the free_irq() sequence is different from that on the probe error path. And the IRQ will still remain and it's interrupt handler may use the dma channel after release dma channel and before free irq, which is not secure, fix it. Fixes: b59c122484ec ("spi: spi-geni-qcom: Add support for GPI dma") Reviewed-by: Dmitry Baryshkov Signed-off-by: Jinjie Ruan --- v4: - Add reviewed-by. v3: - Rebased on the devm_pm_runtime_enable() patch. - Update the commit message. --- drivers/spi/spi-geni-qcom.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-geni-qcom.c b/drivers/spi/spi-geni-qcom.c index fef522fece1b..6f4057330444 100644 --- a/drivers/spi/spi-geni-qcom.c +++ b/drivers/spi/spi-geni-qcom.c @@ -1170,9 +1170,9 @@ static void spi_geni_remove(struct platform_device *pdev) /* Unregister _before_ disabling pm_runtime() so we stop transfers */ spi_unregister_controller(spi); - spi_geni_release_dma_chan(mas); - free_irq(mas->irq, spi); + + spi_geni_release_dma_chan(mas); } static int __maybe_unused spi_geni_runtime_suspend(struct device *dev)