TI Davinci EMAC : Fix Console Hang when bringing the interface down
authorSriram <srk@ti.com>
Thu, 12 Nov 2009 01:55:42 +0000 (01:55 +0000)
committerDavid S. Miller <davem@davemloft.net>
Mon, 16 Nov 2009 06:17:43 +0000 (22:17 -0800)
In the NAPI poll function(emac_poll), check for netif_running()
is unnecassary. In addition to associated runtime overhead, it
also results in a continuous softirq loop when the interface is
brought down under heavy traffic(tested wit Traffic Generator).
Once the interface is disabled, the poll function always returns
zero(with the check for netif_running) and napi_complete() would
never get called resulting in softirq loop.

Signed-off-by: Sriramakrishnan <srk@ti.com>
Acked-by: Chaithrika U S <chaithrika@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/davinci_emac.c

index 3179521aee90152ea16a886f023eba620247ea45..db6380379478ab1a6377c00be4e2234e22a7f38d 100644 (file)
@@ -2140,9 +2140,6 @@ static int emac_poll(struct napi_struct *napi, int budget)
        u32 status = 0;
        u32 num_pkts = 0;
 
-       if (!netif_running(ndev))
-               return 0;
-
        /* Check interrupt vectors and call packet processing */
        status = emac_read(EMAC_MACINVECTOR);