linux-kernel - [PATCH 7/9] misc: sram: simplify probe error path

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Message-ID: <1430570583-8565-8-git-send-email-vladimir_zapolskiy@mentor.com>
Date:	Sat, 2 May 2015 15:43:01 +0300
From:	Vladimir Zapolskiy <vladimir_zapolskiy@...tor.com>
To:	Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Heiko Stübner <heiko@...ech.de>,
	Philipp Zabel <p.zabel@...gutronix.de>
CC:	<linux-kernel@...r.kernel.org>
Subject: [PATCH 7/9] misc: sram: simplify probe error path

Reserved block logic relies only on information from device tree,
there is no need to get and enable device clock in advance, especially
because not provided clock is not considered as an error. No
functional change.

Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@...tor.com>
---
 drivers/misc/sram.c |   20 ++++++++------------
 1 file changed, 8 insertions(+), 12 deletions(-)

diff --git a/drivers/misc/sram.c b/drivers/misc/sram.c
index ac6b587..c1488a8 100644
--- a/drivers/misc/sram.c
+++ b/drivers/misc/sram.c
@@ -100,22 +100,14 @@ static int sram_probe(struct platform_device *pdev)
 	if (!sram->pool)
 		return -ENOMEM;
 
-	sram->clk = devm_clk_get(sram->dev, NULL);
-	if (IS_ERR(sram->clk))
-		sram->clk = NULL;
-	else
-		clk_prepare_enable(sram->clk);
-
 	/*
 	 * We need an additional block to mark the end of the memory region
 	 * after the reserved blocks from the dt are processed.
 	 */
 	nblocks = (np) ? of_get_available_child_count(np) + 1 : 1;
 	rblocks = kmalloc((nblocks) * sizeof(*rblocks), GFP_KERNEL);
-	if (!rblocks) {
+	if (!rblocks)
 		ret = -ENOMEM;
-		goto err_alloc;
-	}
 
 	block = &rblocks[0];
 	for_each_available_child_of_node(np, child) {
@@ -198,6 +190,12 @@ static int sram_probe(struct platform_device *pdev)
 
 	kfree(rblocks);
 
+	sram->clk = devm_clk_get(sram->dev, NULL);
+	if (IS_ERR(sram->clk))
+		sram->clk = NULL;
+	else
+		clk_prepare_enable(sram->clk);
+
 	platform_set_drvdata(pdev, sram);
 
 	dev_dbg(sram->dev, "SRAM pool: %zx KiB @ 0x%p\n",
@@ -207,9 +205,7 @@ static int sram_probe(struct platform_device *pdev)
 
 err_chunks:
 	kfree(rblocks);
-err_alloc:
-	if (sram->clk)
-		clk_disable_unprepare(sram->clk);
+
 	return ret;
 }
 
-- 
1.7.10.4

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