>From 7cccf82cf2c34f8e5b3a60100a1e35108c52bfba Mon Sep 17 00:00:00 2001
From: Oliver Neukum <oneukum@xxxxxxx>
Date: Fri, 16 Jan 2015 14:58:23 +0100
Subject: [PATCH] cdc-wdm: race between work queue and pre_reset
pre_reset() must cease IO so the work needs to check
the flag.
Signed-off-by: Oliver Neukum <oneukum@xxxxxxx>
---
drivers/usb/class/cdc-wdm.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c
index 6647f37..5ff7018 100644
--- a/drivers/usb/class/cdc-wdm.c
+++ b/drivers/usb/class/cdc-wdm.c
@@ -730,7 +730,9 @@ static void wdm_rxwork(struct work_struct *work)
int responding;
spin_lock_irqsave(&desc->iuspin, flags);
- if (test_bit(WDM_DISCONNECTING, &desc->flags)) {
+ if (test_bit(WDM_DISCONNECTING, &desc->flags) ||
+ test_bit(WDM_RESETTING, &desc->flags)
+ ) {
spin_unlock_irqrestore(&desc->iuspin, flags);
} else {
responding = test_and_set_bit(WDM_RESPONDING, &desc->flags);
--
1.8.4.5
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