Fixed bugs in SIS900 RX:

-Receiver MUST be re-enabled by the driver.
-Driver MUST check for multiple packets at once.

git-svn-id: svn://kolibrios.org@2913 a494cfbc-eb01-0410-851d-a64ba20cac60

kernel/branches/net/drivers/sis900.asm

@@ -1065,10 +1065,12 @@ int_handler:
         DEBUGF  1,"IRQ! status=%x\n", ax
 
         test    ax, RxOK
-        jz      .no_rx
+        jz      .no_rx_
 
         push    ax
 
+  .rx_loop:
+
 ;-----------
 ; Get Status
         movzx   eax, [device.cur_rx]                    ; find current descriptor
@@ -1078,12 +1080,10 @@ int_handler:
 ;-------------------------------------------
 ; Check RX_Status to see if packet is waiting
         test    ecx, 0x80000000
-        jnz     .is_packet
-        ret
+        jz      .no_rx
 
 ;----------------------------------------------
 ; There is a packet waiting check it for errors
-  .is_packet:
         test    ecx, 0x67C0000                  ; see if there are any errors
         jnz     .error_status
 
@@ -1122,9 +1122,18 @@ int_handler:
         inc     [device.cur_rx]                         ; get next descriptor
         and     [device.cur_rx], NUM_RX_DESC-1          ; only 4 descriptors 0-3
 
-        pop     ax
+        jmp     .rx_loop
 
   .no_rx:
+        set_io  0
+        set_io  cr
+        in      eax, dx
+        or      eax, RxENA                              ; Re-Enable the Receive state machine
+        out     dx, eax
+
+        pop     ax
+
+  .no_rx_:
         test    ax, TxOK
         jz      .no_tx