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Date: Thu, 12 Nov 2009 17:25:42 +0530 From: Sriramakrishnan <srk@...com> To: netdev@...r.kernel.org Cc: Sriramakrishnan <srk@...com> Subject: [PATCH] TI Davinci EMAC : Fix Console Hang when bringing the interface down 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@...com> Acked-by: Chaithrika U S <chaithrika@...com> --- This patch has been validated on the OMAP-L138 platform. The smsc911x driver has a similar issue. Will post a patch for that separately. drivers/net/davinci_emac.c | 3 --- 1 files changed, 0 insertions(+), 3 deletions(-) diff --git a/drivers/net/davinci_emac.c b/drivers/net/davinci_emac.c index f72c56d..2533413 100644 --- a/drivers/net/davinci_emac.c +++ b/drivers/net/davinci_emac.c @@ -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); -- 1.6.2.4 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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