[rdc] backport upstream multicast fix (#7848)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@22852 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/rdc/patches-2.6.32/015-r6040_fix_multicast.patch b/target/linux/rdc/patches-2.6.32/015-r6040_fix_multicast.patch
new file mode 100644 (file)
index 0000000..f41b4b5
--- /dev/null
+++ b/target/linux/rdc/patches-2.6.32/015-r6040_fix_multicast.patch
@@ -0,0 +1,35 @@
+---
+--- a/drivers/net/r6040.c
++++ b/drivers/net/r6040.c
+@@ -136,7 +136,7 @@
+ #define RX_DESC_SIZE  (RX_DCNT * sizeof(struct r6040_descriptor))
+ #define TX_DESC_SIZE  (TX_DCNT * sizeof(struct r6040_descriptor))
+ #define MBCR_DEFAULT  0x012A  /* MAC Bus Control Register */
+-#define MCAST_MAX     4       /* Max number multicast addresses to filter */
++#define MCAST_MAX     3       /* Max number multicast addresses to filter */
+ 
+ /* Descriptor status */
+ #define DSC_OWNER_MAC 0x8000  /* MAC is the owner of this descriptor */
+@@ -887,9 +887,6 @@ static void r6040_multicast_list(struct 
+                       crc >>= 26;
+                       hash_table[crc >> 4] |= 1 << (15 - (crc & 0xf));
+               }
+-              /* Write the index of the hash table */
+-              for (i = 0; i < 4; i++)
+-                      iowrite16(hash_table[i] << 14, ioaddr + MCR1);
+               /* Fill the MAC hash tables with their values */
+               iowrite16(hash_table[0], ioaddr + MAR0);
+               iowrite16(hash_table[1], ioaddr + MAR1);
+@@ -905,9 +902,9 @@ static void r6040_multicast_list(struct 
+               dmi = dmi->next;
+       }
+       for (i = dev->mc_count; i < MCAST_MAX; i++) {
+-              iowrite16(0xffff, ioaddr + MID_0L + 8*i);
+-              iowrite16(0xffff, ioaddr + MID_0M + 8*i);
+-              iowrite16(0xffff, ioaddr + MID_0H + 8*i);
++              iowrite16(0xffff, ioaddr + MID_1L + 8 * i);
++              iowrite16(0xffff, ioaddr + MID_1M + 8 * i);
++              iowrite16(0xffff, ioaddr + MID_1H + 8 * i);
+       }
+ }
+