From b605c9abc4d2e79eed1332be14a79960a1e9f503 Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Thu, 2 Jan 2020 17:03:18 -0800 Subject: net: phylink: switch to using fwnode_gpiod_get_index() Instead of fwnode_get_named_gpiod() that I plan to hide away, let's use the new fwnode_gpiod_get_index() that mimics gpiod_get_index(), but works with arbitrary firmware node. Reviewed-by: Andy Shevchenko Acked-by: David S. Miller Signed-off-by: Dmitry Torokhov Signed-off-by: David S. Miller --- drivers/net/phy/phylink.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c index ba9468cc8e13..3f7fa634134a 100644 --- a/drivers/net/phy/phylink.c +++ b/drivers/net/phy/phylink.c @@ -186,8 +186,8 @@ static int phylink_parse_fixedlink(struct phylink *pl, pl->link_config.pause |= MLO_PAUSE_ASYM; if (ret == 0) { - desc = fwnode_get_named_gpiod(fixed_node, "link-gpios", - 0, GPIOD_IN, "?"); + desc = fwnode_gpiod_get_index(fixed_node, "link", 0, + GPIOD_IN, "?"); if (!IS_ERR(desc)) pl->link_gpio = desc; -- cgit v1.2.3 From d266f19f3ae7fbcaf92229639b78d2110ae44f33 Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Thu, 2 Jan 2020 17:03:19 -0800 Subject: net: phy: fixed_phy: fix use-after-free when checking link GPIO If we fail to locate GPIO for any reason other than deferral or not-found-GPIO, we try to print device tree node info, however if might be freed already as we called of_node_put() on it. Acked-by: David S. Miller Signed-off-by: Dmitry Torokhov Signed-off-by: David S. Miller --- drivers/net/phy/fixed_phy.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/drivers/net/phy/fixed_phy.c b/drivers/net/phy/fixed_phy.c index 7c5265fd2b94..4190f9ed5313 100644 --- a/drivers/net/phy/fixed_phy.c +++ b/drivers/net/phy/fixed_phy.c @@ -212,16 +212,13 @@ static struct gpio_desc *fixed_phy_get_gpiod(struct device_node *np) */ gpiod = gpiod_get_from_of_node(fixed_link_node, "link-gpios", 0, GPIOD_IN, "mdio"); - of_node_put(fixed_link_node); - if (IS_ERR(gpiod)) { - if (PTR_ERR(gpiod) == -EPROBE_DEFER) - return gpiod; - + if (IS_ERR(gpiod) && PTR_ERR(gpiod) != -EPROBE_DEFER) { if (PTR_ERR(gpiod) != -ENOENT) pr_err("error getting GPIO for fixed link %pOF, proceed without\n", fixed_link_node); gpiod = NULL; } + of_node_put(fixed_link_node); return gpiod; } -- cgit v1.2.3 From 5ffcc85814f27e04c1c0180bf7a3b7b76bb776c8 Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Thu, 2 Jan 2020 17:03:20 -0800 Subject: net: phy: fixed_phy: switch to using fwnode_gpiod_get_index gpiod_get_from_of_node() is being retired in favor of [devm_]fwnode_gpiod_get_index(), that behaves similar to [devm_]gpiod_get_index(), but can work with arbitrary firmware node. It will also be able to support secondary software nodes. Let's switch this driver over. Acked-by: David S. Miller Signed-off-by: Dmitry Torokhov Signed-off-by: David S. Miller --- drivers/net/phy/fixed_phy.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/phy/fixed_phy.c b/drivers/net/phy/fixed_phy.c index 4190f9ed5313..4a3d34f40cb9 100644 --- a/drivers/net/phy/fixed_phy.c +++ b/drivers/net/phy/fixed_phy.c @@ -210,8 +210,8 @@ static struct gpio_desc *fixed_phy_get_gpiod(struct device_node *np) * Linux device associated with it, we simply have obtain * the GPIO descriptor from the device tree like this. */ - gpiod = gpiod_get_from_of_node(fixed_link_node, "link-gpios", 0, - GPIOD_IN, "mdio"); + gpiod = fwnode_gpiod_get_index(of_fwnode_handle(fixed_link_node), + "link", 0, GPIOD_IN, "mdio"); if (IS_ERR(gpiod) && PTR_ERR(gpiod) != -EPROBE_DEFER) { if (PTR_ERR(gpiod) != -ENOENT) pr_err("error getting GPIO for fixed link %pOF, proceed without\n", -- cgit v1.2.3