lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <1316668218-10194-2-git-send-email-shawn.guo@linaro.org>
Date:	Thu, 22 Sep 2011 13:10:16 +0800
From:	Shawn Guo <shawn.guo@...aro.org>
To:	"David S. Miller" <davem@...emloft.net>
CC:	<netdev@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
	<patches@...aro.org>, Shawn Guo <shawn.guo@...aro.org>
Subject: [PATCH v4 1/3] net/fec: fec_reset_phy() does not need to always succeed

FEC can work without a phy reset on some platforms, which means not
very platform necessarily have a phy-reset gpio encoded in device tree.
Even on the platforms that have the gpio, FEC can work without
resetting phy for some cases, e.g. boot loader has done that.

So it makes more sense to have the phy-reset-gpio request failure as
a debug message rather than a warning, and get fec_reset_phy() return
void since the caller does not check the return anyway.

Signed-off-by: Shawn Guo <shawn.guo@...aro.org>
Acked-by: Wolfram Sang <w.sang@...gutronix.de>
---
 drivers/net/ethernet/freescale/fec.c |   13 +++++--------
 1 files changed, 5 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/freescale/fec.c b/drivers/net/ethernet/freescale/fec.c
index 158b82e..9c1d059 100644
--- a/drivers/net/ethernet/freescale/fec.c
+++ b/drivers/net/ethernet/freescale/fec.c
@@ -1411,24 +1411,22 @@ static int __devinit fec_get_phy_mode_dt(struct platform_device *pdev)
 	return -ENODEV;
 }
 
-static int __devinit fec_reset_phy(struct platform_device *pdev)
+static void __devinit fec_reset_phy(struct platform_device *pdev)
 {
 	int err, phy_reset;
 	struct device_node *np = pdev->dev.of_node;
 
 	if (!np)
-		return -ENODEV;
+		return;
 
 	phy_reset = of_get_named_gpio(np, "phy-reset-gpios", 0);
 	err = gpio_request_one(phy_reset, GPIOF_OUT_INIT_LOW, "phy-reset");
 	if (err) {
-		pr_warn("FEC: failed to get gpio phy-reset: %d\n", err);
-		return err;
+		pr_debug("FEC: failed to get gpio phy-reset: %d\n", err);
+		return;
 	}
 	msleep(1);
 	gpio_set_value(phy_reset, 1);
-
-	return 0;
 }
 #else /* CONFIG_OF */
 static inline int fec_get_phy_mode_dt(struct platform_device *pdev)
@@ -1436,13 +1434,12 @@ static inline int fec_get_phy_mode_dt(struct platform_device *pdev)
 	return -ENODEV;
 }
 
-static inline int fec_reset_phy(struct platform_device *pdev)
+static inline void fec_reset_phy(struct platform_device *pdev)
 {
 	/*
 	 * In case of platform probe, the reset has been done
 	 * by machine code.
 	 */
-	return 0;
 }
 #endif /* CONFIG_OF */
 
-- 
1.7.4.1


--
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

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ