From 42c8eb3f6e15367981b274cb79ee4657e2c6949d Mon Sep 17 00:00:00 2001
From: Jia-Ju Bai <baijiaju1990@163.com>
Date: Mon, 9 Oct 2017 16:45:55 +0800
Subject: [PATCH] vt6655: Fix a possible sleep-in-atomic bug in vt6655_suspend
Git-commit: 42c8eb3f6e15367981b274cb79ee4657e2c6949d
Patch-mainline: v4.15-rc1
References: bsc#1051510

The driver may sleep under a spinlock, and the function call path is:
vt6655_suspend (acquire the spinlock)
  pci_set_power_state
    __pci_start_power_transition (drivers/pci/pci.c)
      msleep --> may sleep

To fix it, pci_set_power_state is called without having a spinlock.

This bug is found by my static analysis tool and my code review.

Signed-off-by: Jia-Ju Bai <baijiaju1990@163.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/staging/vt6655/device_main.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/staging/vt6655/device_main.c
+++ b/drivers/staging/vt6655/device_main.c
@@ -1693,10 +1693,11 @@ static int vt6655_suspend(struct pci_dev
 	MACbShutdown(priv);
 
 	pci_disable_device(pcid);
-	pci_set_power_state(pcid, pci_choose_state(pcid, state));
 
 	spin_unlock_irqrestore(&priv->lock, flags);
 
+	pci_set_power_state(pcid, pci_choose_state(pcid, state));
+
 	return 0;
 }