diff options
Diffstat (limited to 'target/linux/generic/backport-4.9/071-v4.10-0001-net-bgmac-allocate-struct-bgmac-just-once-don-t-copy.patch')
| -rw-r--r-- | target/linux/generic/backport-4.9/071-v4.10-0001-net-bgmac-allocate-struct-bgmac-just-once-don-t-copy.patch | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/target/linux/generic/backport-4.9/071-v4.10-0001-net-bgmac-allocate-struct-bgmac-just-once-don-t-copy.patch b/target/linux/generic/backport-4.9/071-v4.10-0001-net-bgmac-allocate-struct-bgmac-just-once-don-t-copy.patch new file mode 100644 index 0000000000..37639faf17 --- /dev/null +++ b/target/linux/generic/backport-4.9/071-v4.10-0001-net-bgmac-allocate-struct-bgmac-just-once-don-t-copy.patch @@ -0,0 +1,139 @@ +From 34a5102c3235c470a6c77fba16cb971964d9c136 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl> +Date: Tue, 31 Jan 2017 19:37:54 +0100 +Subject: [PATCH 1/3] net: bgmac: allocate struct bgmac just once & don't copy + it +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +So far were were allocating struct bgmac in 3 places: platform code, +bcma code and shared bgmac_enet_probe function. The reason for this was +bgmac_enet_probe: +1) Requiring early-filled struct bgmac +2) Calling alloc_etherdev on its own in order to use netdev_priv later + +This solution got few drawbacks: +1) Was duplicating allocating code +2) Required copying early-filled struct +3) Resulted in platform/bcma code having access only to unused struct + +Solve this situation by simply extracting some probe code into the new +bgmac_alloc function. + +Signed-off-by: Rafał Miłecki <rafal@milecki.pl> +Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> +Signed-off-by: David S. Miller <davem@davemloft.net> +--- + drivers/net/ethernet/broadcom/bgmac-bcma.c | 4 +--- + drivers/net/ethernet/broadcom/bgmac-platform.c | 2 +- + drivers/net/ethernet/broadcom/bgmac.c | 25 +++++++++++++++++-------- + drivers/net/ethernet/broadcom/bgmac.h | 3 ++- + 4 files changed, 21 insertions(+), 13 deletions(-) + +--- a/drivers/net/ethernet/broadcom/bgmac-bcma.c ++++ b/drivers/net/ethernet/broadcom/bgmac-bcma.c +@@ -99,12 +99,11 @@ static int bgmac_probe(struct bcma_devic + u8 *mac; + int err; + +- bgmac = kzalloc(sizeof(*bgmac), GFP_KERNEL); ++ bgmac = bgmac_alloc(&core->dev); + if (!bgmac) + return -ENOMEM; + + bgmac->bcma.core = core; +- bgmac->dev = &core->dev; + bgmac->dma_dev = core->dma_dev; + bgmac->irq = core->irq; + +@@ -285,7 +284,6 @@ static int bgmac_probe(struct bcma_devic + err1: + bcma_mdio_mii_unregister(bgmac->mii_bus); + err: +- kfree(bgmac); + bcma_set_drvdata(core, NULL); + + return err; +--- a/drivers/net/ethernet/broadcom/bgmac-platform.c ++++ b/drivers/net/ethernet/broadcom/bgmac-platform.c +@@ -93,7 +93,7 @@ static int bgmac_probe(struct platform_d + struct resource *regs; + const u8 *mac_addr; + +- bgmac = devm_kzalloc(&pdev->dev, sizeof(*bgmac), GFP_KERNEL); ++ bgmac = bgmac_alloc(&pdev->dev); + if (!bgmac) + return -ENOMEM; + +--- a/drivers/net/ethernet/broadcom/bgmac.c ++++ b/drivers/net/ethernet/broadcom/bgmac.c +@@ -1459,22 +1459,32 @@ static int bgmac_phy_connect(struct bgma + return 0; + } + +-int bgmac_enet_probe(struct bgmac *info) ++struct bgmac *bgmac_alloc(struct device *dev) + { + struct net_device *net_dev; + struct bgmac *bgmac; +- int err; + + /* Allocation and references */ +- net_dev = alloc_etherdev(sizeof(*bgmac)); ++ net_dev = devm_alloc_etherdev(dev, sizeof(*bgmac)); + if (!net_dev) +- return -ENOMEM; ++ return NULL; + + net_dev->netdev_ops = &bgmac_netdev_ops; + net_dev->ethtool_ops = &bgmac_ethtool_ops; ++ + bgmac = netdev_priv(net_dev); +- memcpy(bgmac, info, sizeof(*bgmac)); ++ bgmac->dev = dev; + bgmac->net_dev = net_dev; ++ ++ return bgmac; ++} ++EXPORT_SYMBOL_GPL(bgmac_alloc); ++ ++int bgmac_enet_probe(struct bgmac *bgmac) ++{ ++ struct net_device *net_dev = bgmac->net_dev; ++ int err; ++ + net_dev->irq = bgmac->irq; + SET_NETDEV_DEV(net_dev, bgmac->dev); + +@@ -1501,7 +1511,7 @@ int bgmac_enet_probe(struct bgmac *info) + err = bgmac_dma_alloc(bgmac); + if (err) { + dev_err(bgmac->dev, "Unable to alloc memory for DMA\n"); +- goto err_netdev_free; ++ goto err_out; + } + + bgmac->int_mask = BGMAC_IS_ERRMASK | BGMAC_IS_RX | BGMAC_IS_TX_MASK; +@@ -1537,8 +1547,7 @@ err_phy_disconnect: + phy_disconnect(net_dev->phydev); + err_dma_free: + bgmac_dma_free(bgmac); +-err_netdev_free: +- free_netdev(net_dev); ++err_out: + + return err; + } +--- a/drivers/net/ethernet/broadcom/bgmac.h ++++ b/drivers/net/ethernet/broadcom/bgmac.h +@@ -515,7 +515,8 @@ struct bgmac { + u32 set); + }; + +-int bgmac_enet_probe(struct bgmac *info); ++struct bgmac *bgmac_alloc(struct device *dev); ++int bgmac_enet_probe(struct bgmac *bgmac); + void bgmac_enet_remove(struct bgmac *bgmac); + + struct mii_bus *bcma_mdio_mii_register(struct bcma_device *core, u8 phyaddr); |