From: Chenguang Zhao Date: Thu, 23 Jul 2026 02:18:20 +0000 (+0800) Subject: net: sxgbe: check descriptor ring allocation failures X-Git-Tag: v7.2-rc6~33^2~19 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=51b093a7ba27476e1f639455f005e8d2e75390e4;p=thirdparty%2Flinux.git net: sxgbe: check descriptor ring allocation failures sxgbe_open() ignores the return value of init_dma_desc_rings() and continues to program DMA with invalid ring addresses when allocation fails. Check the return value and disconnect the PHY on failure. Fixes: 1edb9ca69e8a ("net: sxgbe: add basic framework for Samsung 10Gb ethernet driver") Signed-off-by: Chenguang Zhao Reviewed-by: Vadim Fedorenko Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c b/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c index 9b48a587d5c2..70cf3619555f 100644 --- a/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c +++ b/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c @@ -1078,7 +1078,9 @@ static int sxgbe_open(struct net_device *dev) priv->dma_buf_sz = SXGBE_ALIGN(DMA_BUFFER_SIZE); priv->tx_tc = TC_DEFAULT; priv->rx_tc = TC_DEFAULT; - init_dma_desc_rings(dev); + ret = init_dma_desc_rings(dev); + if (ret) + goto init_phy_error; /* DMA initialization and SW reset */ ret = sxgbe_init_dma_engine(priv); @@ -1187,6 +1189,7 @@ static int sxgbe_open(struct net_device *dev) init_error: free_dma_desc_resources(priv); +init_phy_error: if (dev->phydev) phy_disconnect(dev->phydev); phy_error: