On 16 May 2015 at 17:57, Larry Finger <Larry.Finger@xxxxxxxxxxxx> wrote:
> The problem appears to be from r8712u. From the stack dump, the problem
> happens when r8712_free_recvframe() calls __dev_kfree_skb_any(). A
> complication is that my copy of the kernel source does not show such a call.
> :(
>
> Please use gdb to help with the debugging. From the main directory of your
> source, enter the command 'gdb drivers/staging/rtl8712/r8712u.ko'. Once it
> prompts you, enter 'l *r8712_free_recvframe+0x2c'. The first character is
> ell, not one. That will show the actual line of code. Please post that info.
Here's what I get:
(gdb) l *r8712_free_recvframe+0x2c
0x16714 is in r8712_free_recvframe (drivers/staging/rtl8712/rtl8712_recv.c:145).
140 struct _adapter *padapter = precvframe->u.hdr.adapter;
141 struct recv_priv *precvpriv = &padapter->recvpriv;
142
143 if (precvframe->u.hdr.pkt) {
144
dev_kfree_skb_any(precvframe->u.hdr.pkt);/*free skb by driver*/
145 precvframe->u.hdr.pkt = NULL;
146 }
147 spin_lock_irqsave(&pfree_recv_queue->lock, irqL);
148 list_del_init(&(precvframe->u.hdr.list));
149 list_add_tail(&(precvframe->u.hdr.list),
&pfree_recv_queue->queue);
It seems that dev_kfree_skb_any is an inline function that calls
__dev_kfree_skb_any,
so that should explain why that call didn't show up in the stack dump.
Haggai
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