netdev - [PATCH v2 1/4] net: fec: handle optional clk

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Message-ID: <1363595185-12302-2-git-send-email-shawn.guo@linaro.org>
Date:	Mon, 18 Mar 2013 16:26:22 +0800
From:	Shawn Guo <shawn.guo@...aro.org>
To:	<linux-arm-kernel@...ts.infradead.org>
CC:	<netdev@...r.kernel.org>, "David S. Miller" <davem@...emloft.net>,
	Shawn Guo <shawn.guo@...aro.org>
Subject: [PATCH v2 1/4] net: fec: handle optional clk_ptp more gracefully

When the optional clk_ptp is absent, we can just set it to NULL, and
clk API will just handle it gracefully.  It saves us from checking
clk_ptp whenever calling into clk API.

Also since clk_ptp is optional, the "ret" variable shouldn't be set
in case that the clock is absent.

Signed-off-by: Shawn Guo <shawn.guo@...aro.org>
---
 drivers/net/ethernet/freescale/fec.c |    8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/freescale/fec.c b/drivers/net/ethernet/freescale/fec.c
index fccc3bf..d2a9851 100644
--- a/drivers/net/ethernet/freescale/fec.c
+++ b/drivers/net/ethernet/freescale/fec.c
@@ -1804,14 +1804,13 @@ fec_probe(struct platform_device *pdev)
 	fep->bufdesc_ex =
 		pdev->id_entry->driver_data & FEC_QUIRK_HAS_BUFDESC_EX;
 	if (IS_ERR(fep->clk_ptp)) {
-		ret = PTR_ERR(fep->clk_ptp);
+		fep->clk_ptp = NULL;
 		fep->bufdesc_ex = 0;
 	}
 
 	clk_prepare_enable(fep->clk_ahb);
 	clk_prepare_enable(fep->clk_ipg);
-	if (!IS_ERR(fep->clk_ptp))
-		clk_prepare_enable(fep->clk_ptp);
+	clk_prepare_enable(fep->clk_ptp);
 
 	reg_phy = devm_regulator_get(&pdev->dev, "phy");
 	if (!IS_ERR(reg_phy)) {
@@ -1876,8 +1875,7 @@ failed_irq:
 failed_regulator:
 	clk_disable_unprepare(fep->clk_ahb);
 	clk_disable_unprepare(fep->clk_ipg);
-	if (!IS_ERR(fep->clk_ptp))
-		clk_disable_unprepare(fep->clk_ptp);
+	clk_disable_unprepare(fep->clk_ptp);
 failed_pin:
 failed_clk:
 	iounmap(fep->hwp);
-- 
1.7.9.5


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