Re: [Qemu-devel] [PATCH 13/21] libcacard: fix reported ATR length

[Wen Congyang <wency@cn.fujitsu.com>]

At 02/28/2012 06:20 PM, Gerd Hoffmann Wrote:
> From: Alon Levy <alevy@redhat.com>
> 
> Signed-off-by: Alon Levy <alevy@redhat.com>
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
> ---
>  libcacard/vcardt.h |    4 ++--
>  1 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/libcacard/vcardt.h b/libcacard/vcardt.h
> index 538bdde..d4d8e2e 100644
> --- a/libcacard/vcardt.h
> +++ b/libcacard/vcardt.h
> @@ -26,8 +26,8 @@ typedef struct VCardEmulStruct VCardEmul;
>  #define MAX_CHANNEL 4
>  
>  /* create an ATR with appropriate historical bytes */
> -#define VCARD_ATR_PREFIX(size) 0x3b, 0x66+(size), 0x00, 0xff, \
> -                               'V', 'C', 'A', 'R', 'D', '_'
> +#define VCARD_ATR_PREFIX(size) (0x3b, 0x68+(size), 0x00, 0xff, \
> +                               'V', 'C', 'A', 'R', 'D', '_')
>  
>  
>  typedef enum {

qemu build faile with this patch:

  CC    libcacard/vcard_emul_nss.o
cc1: warnings being treated as errors
vcard_emul_nss.c:528: error: left-hand operand of comma expression has no effect
vcard_emul_nss.c:528: error: left-hand operand of comma expression has no effect
vcard_emul_nss.c:528: error: left-hand operand of comma expression has no effect
vcard_emul_nss.c:528: error: left-hand operand of comma expression has no effect
vcard_emul_nss.c:528: error: left-hand operand of comma expression has no effect
vcard_emul_nss.c:528: error: left-hand operand of comma expression has no effect
vcard_emul_nss.c:528: error: left-hand operand of comma expression has no effect
vcard_emul_nss.c:528: error: left-hand operand of comma expression has no effect
vcard_emul_nss.c:528: error: left-hand operand of comma expression has no effect
vcard_emul_nss.c:528: error: initializer element is not constant
vcard_emul_nss.c:528: error: (near initialization for ‘nss_atr[0]’)
make[1]: *** [vcard_emul_nss.o] Error 1
make: *** [subdir-libcacard] Error 2

I donot know this patch's purpose, so I donot know how to fix it. I guess this
patch is unnecessary.

Thanks
Wen Congyang