linux-kernel - [PATCH RT 06/16] pci/switchtec: fix stream

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Date:   Fri, 19 Jul 2019 17:49:37 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     linux-kernel@...r.kernel.org,
        linux-rt-users <linux-rt-users@...r.kernel.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Carsten Emde <C.Emde@...dl.org>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        John Kacur <jkacur@...hat.com>,
        Paul Gortmaker <paul.gortmaker@...driver.com>,
        Julia Cartwright <julia@...com>,
        Daniel Wagner <wagi@...om.org>, tom.zanussi@...ux.intel.com,
        Kirill Smelkov <kirr@...edi.com>,
        Julia Lawall <julia.lawall@...6.fr>,
        kbuild test robot <lkp@...el.com>
Subject: [PATCH RT 06/16] pci/switchtec: fix stream_open.cocci warnings

4.19.59-rt24-rc1 stable review patch.
If anyone has any objections, please let me know.

------------------

From: kbuild test robot <lkp@...el.com>

[ Upstream commit 9462c69e29307adc95c289f50839d5d683973891 ]

drivers/pci/switch/switchtec.c:395:1-17: ERROR: switchtec_fops: .read() can deadlock .write(); change nonseekable_open -> stream_open to fix.

Generated by: scripts/coccinelle/api/stream_open.cocci

Cc: Kirill Smelkov <kirr@...edi.com>
Cc: Julia Lawall <julia.lawall@...6.fr>
Fixes: 8a29a3bae2a2 ("pci/switchtec: Don't use completion's wait queue")
Cc: stable-rt@...r.kernel.org # where it applies to
Link: https://lkml.kernel.org/r/alpine.DEB.2.21.1904131849350.2536@hadrien
Signed-off-by: kbuild test robot <lkp@...el.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Signed-off-by: Steven Rostedt (VMware) <rostedt@...dmis.org>
---
 drivers/pci/switch/switchtec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/switch/switchtec.c b/drivers/pci/switch/switchtec.c
index 77d4fb86d05b..ea70bc0b06e9 100644
--- a/drivers/pci/switch/switchtec.c
+++ b/drivers/pci/switch/switchtec.c
@@ -360,7 +360,7 @@ static int switchtec_dev_open(struct inode *inode, struct file *filp)
 		return PTR_ERR(stuser);
 
 	filp->private_data = stuser;
-	nonseekable_open(inode, filp);
+	stream_open(inode, filp);
 
 	dev_dbg(&stdev->dev, "%s: %p\n", __func__, stuser);
 
-- 
2.20.1