The driver may sleep under a read spin lock, and the function call path is:
send_socklist (acquire the lock by read_lock)
skb_copy(GFP_KERNEL) --> may sleep
To fix it, the "GFP_KERNEL" is replaced with "GFP_ATOMIC".
Signed-off-by: Jia-Ju Bai <baijiaju1...@163.com>
---
drivers/isdn/mISDN/stack.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/isdn/mISDN/stack.c b/drivers/isdn/mISDN/stack.c
index 8b7faea..422dced 100644
--- a/drivers/isdn/mISDN/stack.c
+++ b/drivers/isdn/mISDN/stack.c
@@ -75,7 +75,7 @@
if (sk->sk_state != MISDN_BOUND)
continue;
if (!cskb)
- cskb = skb_copy(skb, GFP_KERNEL);
+ cskb = skb_copy(skb, GFP_ATOMIC);
if (!cskb) {
printk(KERN_WARNING "%s no skb\n", __func__);
break;
--
1.7.9.5
