[net-next PATCH] ixgbevf: fix unused variable warning

[net-next PATCH] ixgbevf: fix unused variable warning

[Arnd Bergmann]

The new ixgbevf_set_rx_buffer_len() function causes a harmless warnings
in configurations with large page size:

drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c: In function 'ixgbevf_set_rx_buffer_len':
drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c:1758:15: error: unused variable 'max_frame' [-Werror=unused-variable]

This rephrases the code so that the compiler can see the use of that
variable, making it slightly easier to read in the process.

Fixes: f15c5ba5b6cd ("ixgbevf: add support for using order 1 pages to receive large frames")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
index f37307131eb6..4da449e0a4ba 100644
--- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
+++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
@@ -1766,12 +1766,12 @@ static void ixgbevf_set_rx_buffer_len(struct ixgbevf_adapter *adapter,
 
 	set_ring_build_skb_enabled(rx_ring);
 
-#if (PAGE_SIZE < 8192)
-	if (max_frame <= IXGBEVF_MAX_FRAME_BUILD_SKB)
-		return;
+	if (PAGE_SIZE < 8192) {
+		if (max_frame <= IXGBEVF_MAX_FRAME_BUILD_SKB)
+			return;
 
-	set_ring_uses_large_buffer(rx_ring);
-#endif
+		set_ring_uses_large_buffer(rx_ring);
+	}
 }
 
 /**
-- 
2.9.0

Re: [Intel-wired-lan] [net-next PATCH] ixgbevf: fix unused variable warning

[Alexander Duyck]

On Wed, Feb 28, 2018 at 3:17 PM, Arnd Bergmann <arnd@arndb.de> wrote:
> The new ixgbevf_set_rx_buffer_len() function causes a harmless warnings
> in configurations with large page size:
>
> drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c: In function 'ixgbevf_set_rx_buffer_len':
> drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c:1758:15: error: unused variable 'max_frame' [-Werror=unused-variable]
>
> This rephrases the code so that the compiler can see the use of that
> variable, making it slightly easier to read in the process.
>
> Fixes: f15c5ba5b6cd ("ixgbevf: add support for using order 1 pages to receive large frames")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
>  drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
> index f37307131eb6..4da449e0a4ba 100644
> --- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
> +++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
> @@ -1766,12 +1766,12 @@ static void ixgbevf_set_rx_buffer_len(struct ixgbevf_adapter *adapter,
>
>         set_ring_build_skb_enabled(rx_ring);
>
> -#if (PAGE_SIZE < 8192)
> -       if (max_frame <= IXGBEVF_MAX_FRAME_BUILD_SKB)
> -               return;
> +       if (PAGE_SIZE < 8192) {
> +               if (max_frame <= IXGBEVF_MAX_FRAME_BUILD_SKB)
> +                       return;
>
> -       set_ring_uses_large_buffer(rx_ring);
> -#endif
> +               set_ring_uses_large_buffer(rx_ring);
> +       }
>  }
>
>  /**

The fix looks good to me.

Acked-by: Alexander Duyck <alexander.h.duyck@intel.com>