From 5e6efe88c54ad79353666f5371b5b97c0e16111e Mon Sep 17 00:00:00 2001 From: Giuseppe CAVALLARO Date: Wed, 26 Oct 2011 19:43:07 +0000 Subject: [PATCH] stmmac: fix a bug while checking the HW cap reg (v2) The patch fixes a bug while checking the HW cap reg on old MAC10/100 where this feature is not available. Signed-off-by: Giuseppe Cavallaro Signed-off-by: David S. Miller --- drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index aeaa15b451de..fcdd5a2cbb55 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -812,9 +812,10 @@ static u32 stmmac_get_synopsys_id(struct stmmac_priv *priv) */ static int stmmac_get_hw_features(struct stmmac_priv *priv) { - u32 hw_cap = priv->hw->dma->get_hw_feature(priv->ioaddr); + u32 hw_cap = 0; + if (priv->hw->dma->get_hw_feature) { + hw_cap = priv->hw->dma->get_hw_feature(priv->ioaddr); - if (likely(hw_cap)) { priv->dma_cap.mbps_10_100 = (hw_cap & DMA_HW_FEAT_MIISEL); priv->dma_cap.mbps_1000 = (hw_cap & DMA_HW_FEAT_GMIISEL) >> 1; priv->dma_cap.half_duplex = (hw_cap & DMA_HW_FEAT_HDSEL) >> 2; -- 2.20.1