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Date: Sun, 17 May 2015 12:29:33 +0200
From: Arend van Spriel <aspriel@gmail.com>
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To: Haggai Eran <haggai.eran@gmail.com>,
	Larry Finger <Larry.Finger@lwfinger.net>
CC: Florian Schilhabel <florian.c.schilhabel@googlemail.com>,
	linux-wireless@vger.kernel.org
Subject: Re: kernel page fault in r8712u
References: <CAJ=9Czbh2cT-qvkEmvVWPCwWdAJ5H_kAcRXirW4MQDhrMb4XRg@mail.gmail.com>	<55575AC8.2060301@lwfinger.net>	<CAJ=9CzasMnjhMSWT0P=eenvaeDA04Q2aGhY0z1npD-NDuh7YeQ@mail.gmail.com>	<5557844B.4040108@lwfinger.net> <CAJ=9CzamCxkwVtTtUzU9zatocUPz0W+3f0Kgm6N0tDMWbcP_LA@mail.gmail.com>
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On 17-05-15 06:25, Haggai Eran wrote:
> On 16 May 2015 at 20:54, Larry Finger <Larry.Finger@lwfinger.net> wrote:
>> Another location needed from gdb is "l *recv_func+0x8c".
>
> Here it is:
> (gdb) l *recv_func+0x8c
> 0x17094 is in recv_func (drivers/staging/rtl8712/rtl8712_recv.c:1004).
> 999                     r8712_free_recvframe(orig_prframe, pfree_recv_queue);
> 1000                    goto _exit_recv_func;
> 1001            }
> 1002    _exit_recv_func:
> 1003            return retval;
> 1004    }
> 1005
> 1006    static int recvbuf2recvframe(struct _adapter *padapter, struct
> sk_buff *pskb)
> 1007    {
> 1008            u8 *pbuf, shift_sz = 0;
>
> I don't think this means the relevant call is the one at line 999. I
> think it is an earlier call, after r8712_validate_recv_frame. Here's
> the disassembly:

can you provide the address of recv_func as well to determine the exact 
location in assembly.

Regards,
Arend

>          /* check the frame crtl field and decache */
>          retval = r8712_validate_recv_frame(padapter, prframe);
>     17070:       e1a00004        mov     r0, r4
>     17074:       e1a01005        mov     r1, r5
>     17078:       ebfffffe        bl      17bc0 <r8712_validate_recv_frame>
>          if (retval != _SUCCESS) {
>     1707c:       e3500001        cmp     r0, #1
>                          r8712_free_recvframe(orig_prframe, pfree_recv_queue);
>                          goto _exit_recv_func;
>                  }
>          }
>          /* check the frame crtl field and decache */
>          retval = r8712_validate_recv_frame(padapter, prframe);
>     17080:       e1a06000        mov     r6, r0
>          if (retval != _SUCCESS) {
>     17084:       0a000005        beq     170a0 <recv_func+0x98>
>                  /* free this recv_frame */
>                  r8712_free_recvframe(orig_prframe, pfree_recv_queue);
>     17088:       e1a00005        mov     r0, r5
>     1708c:       e1a01007        mov     r1, r7
>     17090:       ebfffffe        bl      166e8 <r8712_free_recvframe>
>                  r8712_free_recvframe(orig_prframe, pfree_recv_queue);
>                  goto _exit_recv_func;
>          }
> _exit_recv_func:
>          return retval;
> }
>     17094:       e1a00006        mov     r0, r6
>
> Haggai
> --
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