gianfar: Don't enable RX Filer if not supported

After commit 15bf176db1fb ("gianfar: Don't enable the Filer w/o the
Parser"), 'TSEC' model controllers (for example as seen on MPC8541E)
always have 8 bytes stripped from the front of received frames.
Only 'eTSEC' gianfar controllers have the RX Filer capability (amongst
other enhancements). Previously this was treated as always enabled
for both 'TSEC' and 'eTSEC' controllers.
In commit 15bf176db1fb ("gianfar: Don't enable the Filer w/o the Parser")
a subtle change was made to the setting of 'uses_rxfcb' to effectively
always set it (since 'rx_filer_enable' was always true). This had the
side-effect of always stripping 8 bytes from the front of received frames
on 'TSEC' type controllers.

We now only enable the RX Filer capability on controller types that
support it, thereby avoiding the issue for 'TSEC' type controllers.

Reviewed-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Reviewed-by: Mark Tomlinson <mark.tomlinson@alliedtelesis.co.nz>
Signed-off-by: Hamish Martin <hamish.martin@alliedtelesis.co.nz>
Reviewed-by: Claudiu Manoil <claudiu.manoil@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/freescale/gianfar.c b/drivers/net/ethernet/freescale/gianfar.c
index 7cf898455e60076d52c1031422f3d90a3a10f4a3..3e233d924cce3b8bbf6bf5901b61455c5c0cd2dc 100644 (file)
--- a/drivers/net/ethernet/freescale/gianfar.c
+++ b/drivers/net/ethernet/freescale/gianfar.c
@@ -894,7 +894,8 @@ static int gfar_of_init(struct platform_device *ofdev, struct net_device **pdev)
                                     FSL_GIANFAR_DEV_HAS_VLAN |
                                     FSL_GIANFAR_DEV_HAS_MAGIC_PACKET |
                                     FSL_GIANFAR_DEV_HAS_EXTENDED_HASH |
-                                    FSL_GIANFAR_DEV_HAS_TIMER;
+                                    FSL_GIANFAR_DEV_HAS_TIMER |
+                                    FSL_GIANFAR_DEV_HAS_RX_FILER;
 
        err = of_property_read_string(np, "phy-connection-type", &ctype);
 
@@ -1396,8 +1397,9 @@ static int gfar_probe(struct platform_device *ofdev)
                priv->rx_queue[i]->rxic = DEFAULT_RXIC;
        }
 
-       /* always enable rx filer */
-       priv->rx_filer_enable = 1;
+       /* Always enable rx filer if available */
+       priv->rx_filer_enable =
+           (priv->device_flags & FSL_GIANFAR_DEV_HAS_RX_FILER) ? 1 : 0;
        /* Enable most messages by default */
        priv->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;
        /* use pritority h/w tx queue scheduling for single queue devices */

diff --git a/drivers/net/ethernet/freescale/gianfar.h b/drivers/net/ethernet/freescale/gianfar.h
index f266b20f9ef5be53e6c55f2579484bb72d8794a1..cb77667971a7e4dd761ada53273f04a2047cf259 100644 (file)
--- a/drivers/net/ethernet/freescale/gianfar.h
+++ b/drivers/net/ethernet/freescale/gianfar.h
@@ -923,6 +923,7 @@ struct gfar {
 #define FSL_GIANFAR_DEV_HAS_BUF_STASHING       0x00000400
 #define FSL_GIANFAR_DEV_HAS_TIMER              0x00000800
 #define FSL_GIANFAR_DEV_HAS_WAKE_ON_FILER      0x00001000
+#define FSL_GIANFAR_DEV_HAS_RX_FILER           0x00002000
 
 #if (MAXGROUPS == 2)
 #define DEFAULT_MAPPING        0xAA