From: Eric W. Biederman Date: Sat, 15 Mar 2014 01:03:23 +0000 (-0700) Subject: fs_enet: Don't receive packets when the napi budget == 0 X-Git-Tag: firefly_0821_release~176^2~4167^2~145^2~9 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=9b2c05713edb56a338536ab26541e155763c0961;p=firefly-linux-kernel-4.4.55.git fs_enet: Don't receive packets when the napi budget == 0 Processing any incoming packets with a with a napi budget of 0 is incorrect driver behavior. This matters as netpoll will shortly call drivers with a budget of 0 to avoid receive packet processing happening in hard irq context. Signed-off-by: "Eric W. Biederman" Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c b/drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c index 62f042d4aaa9..dc80db41d6b3 100644 --- a/drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c +++ b/drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c @@ -91,6 +91,9 @@ static int fs_enet_rx_napi(struct napi_struct *napi, int budget) u16 pkt_len, sc; int curidx; + if (budget <= 0) + return received; + /* * First, grab all of the stats for the incoming packet. * These get messed up if we get called due to a busy condition.