linux-kernel - [PATCH 1/5] dmaengine: mv_xor

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 17 Jul 2018 13:29:59 +0300
From:   <hannah@...vell.com>
To:     <dan.j.williams@...el.com>, <vkoul@...nel.org>,
        <dmaengine@...r.kernel.org>
CC:     <thomas.petazzoni@...tlin.com>, <linux-kernel@...r.kernel.org>,
        <nadavh@...vell.com>, <omrii@...vell.com>, <oferh@...vell.com>,
        <gregory.clement@...tlin.com>, Hanna Hawa <hannah@...vell.com>
Subject: [PATCH 1/5] dmaengine: mv_xor_v2: explicitly freeup irq

From: Hanna Hawa <hannah@...vell.com>

dmaengine device should explicitly call devm_free_irq() when using
devm_request_irq().

The irq is still ON when devices remove is executed and irq should be
quiesced before remove is completed.

Signed-off-by: Hanna Hawa <hannah@...vell.com>
---
 drivers/dma/mv_xor_v2.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/dma/mv_xor_v2.c b/drivers/dma/mv_xor_v2.c
index c6589cc..e16083a 100644
--- a/drivers/dma/mv_xor_v2.c
+++ b/drivers/dma/mv_xor_v2.c
@@ -174,6 +174,7 @@ struct mv_xor_v2_device {
 	int desc_size;
 	unsigned int npendings;
 	unsigned int hw_queue_idx;
+	struct msi_desc *msi_desc;
 };
 
 /**
@@ -780,6 +781,7 @@ static int mv_xor_v2_probe(struct platform_device *pdev)
 	msi_desc = first_msi_entry(&pdev->dev);
 	if (!msi_desc)
 		goto free_msi_irqs;
+	xor_dev->msi_desc = msi_desc;
 
 	ret = devm_request_irq(&pdev->dev, msi_desc->irq,
 			       mv_xor_v2_interrupt_handler, 0,
@@ -897,6 +899,8 @@ static int mv_xor_v2_remove(struct platform_device *pdev)
 			  xor_dev->desc_size * MV_XOR_V2_DESC_NUM,
 			  xor_dev->hw_desq_virt, xor_dev->hw_desq);
 
+	devm_free_irq(&pdev->dev, xor_dev->msi_desc->irq, xor_dev);
+
 	platform_msi_domain_free_irqs(&pdev->dev);
 
 	clk_disable_unprepare(xor_dev->clk);
-- 
1.9.1