linux-kernel - Re: [PATCH V3 07/12] ata/sata_mv: Remove conditional compilation of clk code

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Message-ID: <CAOh2x=kOww+K-VrNJU_v6XXANQUGyBtZ-ekoCAEQV5kEdah7jQ@mail.gmail.com>
Date:	Tue, 24 Apr 2012 22:32:14 +0530
From:	viresh kumar <viresh.linux@...il.com>
To:	viresh kumar <viresh.linux@...il.com>,
	Andrew Lunn <andrew@...n.ch>,
	Viresh Kumar <viresh.kumar@...com>, akpm@...ux-foundation.org,
	spear-devel@...t.st.com, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, mturquette@...aro.org,
	sshtylyov@...sta.com, jgarzik@...hat.com, linux@....linux.org.uk,
	linux-ide@...r.kernel.org
Subject: Re: [PATCH V3 07/12] ata/sata_mv: Remove conditional compilation of
 clk code

On 4/24/12, Andrew Lunn <andrew@...n.ch> wrote:
>    This is wrong. Not having the clk is not fatal. The old code would
>    carefully not call clk_enable(), since it has an error pointer, not
>    have a valid clk, and would also not call clk_disable during
>    removal.

Whatever i wrote was intentional, because i didn't had this expectation
of yours. :(
Please see if following is fine:

From: Viresh Kumar <viresh.kumar@...com>
Date: Sat, 21 Apr 2012 11:16:53 +0530
Subject: [PATCH V3 Resend] ata/sata_mv: Remove conditional compilation
of clk code

With addition of dummy clk_*() calls for non CONFIG_HAVE_CLK cases in clk.h,
there is no need to have clk code enclosed in #ifdef CONFIG_HAVE_CLK, #endif
macros.

Signed-off-by: Viresh Kumar <viresh.kumar@...com>
Cc: Jeff Garzik <jgarzik@...hat.com>
Cc: Andrew Lunn <andrew@...n.ch>
Cc: linux-ide@...r.kernel.org
---
 drivers/ata/sata_mv.c |   10 ----------
 1 files changed, 0 insertions(+), 10 deletions(-)

diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index 7336d4a..37503b8 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -551,9 +551,7 @@ struct mv_host_priv {
 	u32			irq_mask_offset;
 	u32			unmask_all_irqs;

-#if defined(CONFIG_HAVE_CLK)
 	struct clk		*clk;
-#endif
 	/*
 	 * These consistent DMA memory pools give us guaranteed
 	 * alignment for hardware-accessed data structures,
@@ -4063,13 +4061,11 @@ static int mv_platform_probe(struct
platform_device *pdev)
 				   resource_size(res));
 	hpriv->base -= SATAHC0_REG_BASE;

-#if defined(CONFIG_HAVE_CLK)
 	hpriv->clk = clk_get(&pdev->dev, NULL);
 	if (IS_ERR(hpriv->clk))
 		dev_notice(&pdev->dev, "cannot get clkdev\n");
 	else
 		clk_enable(hpriv->clk);
-#endif

 	/*
 	 * (Re-)program MBUS remapping windows if we are asked to.
@@ -4096,12 +4092,10 @@ static int mv_platform_probe(struct
platform_device *pdev)
 		return 0;

 err:
-#if defined(CONFIG_HAVE_CLK)
 	if (!IS_ERR(hpriv->clk)) {
 		clk_disable(hpriv->clk);
 		clk_put(hpriv->clk);
 	}
-#endif

 	return rc;
 }
@@ -4117,17 +4111,13 @@ err:
 static int __devexit mv_platform_remove(struct platform_device *pdev)
 {
 	struct ata_host *host = platform_get_drvdata(pdev);
-#if defined(CONFIG_HAVE_CLK)
 	struct mv_host_priv *hpriv = host->private_data;
-#endif
 	ata_host_detach(host);

-#if defined(CONFIG_HAVE_CLK)
 	if (!IS_ERR(hpriv->clk)) {
 		clk_disable(hpriv->clk);
 		clk_put(hpriv->clk);
 	}
-#endif
 	return 0;
 }
--
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