linux-kernel - [PATCH 2/3] soc: brcmstb: dpfe: optimize generic

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Date:   Mon, 11 Feb 2019 17:24:42 -0800
From:   Markus Mayer <code@...yer.net>
To:     Brian Norris <computersforpeace@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Gregory Fong <gregory.0xf0@...il.com>
Cc:     Markus Mayer <mmayer@...adcom.com>,
        Broadcom Kernel List <bcm-kernel-feedback-list@...adcom.com>,
        ARM Kernel List <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH 2/3] soc: brcmstb: dpfe: optimize generic_show()

From: Markus Mayer <mmayer@...adcom.com>

We can pass a (struct priv_data *) to generic_show() rather than a
(struct device *). For two of the three callers of this function, the
change means one less call to dev_get_drvdata(). For the third caller,
it makes no difference.

Signed-off-by: Markus Mayer <mmayer@...adcom.com>
---
 drivers/memory/brcmstb_dpfe.c | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/drivers/memory/brcmstb_dpfe.c b/drivers/memory/brcmstb_dpfe.c
index 8e1ccdb0e59d..1095c1d95df4 100644
--- a/drivers/memory/brcmstb_dpfe.c
+++ b/drivers/memory/brcmstb_dpfe.c
@@ -527,12 +527,10 @@ static int brcmstb_dpfe_download_firmware(struct platform_device *pdev,
 }
 
 static ssize_t generic_show(unsigned int command, u32 response[],
-			    struct device *dev, char *buf)
+			    struct private_data *priv, char *buf)
 {
-	struct private_data *priv;
 	int ret;
 
-	priv = dev_get_drvdata(dev);
 	if (!priv)
 		return sprintf(buf, "ERROR: driver private data not set\n");
 
@@ -547,10 +545,12 @@ static ssize_t show_info(struct device *dev, struct device_attribute *devattr,
 			 char *buf)
 {
 	u32 response[MSG_FIELD_MAX];
+	struct private_data *priv;
 	unsigned int info;
 	ssize_t ret;
 
-	ret = generic_show(DPFE_CMD_GET_INFO, response, dev, buf);
+	priv = dev_get_drvdata(dev);
+	ret = generic_show(DPFE_CMD_GET_INFO, response, priv, buf);
 	if (ret)
 		return ret;
 
@@ -573,12 +573,11 @@ static ssize_t show_refresh(struct device *dev,
 	u32 mr4;
 	ssize_t ret;
 
-	ret = generic_show(DPFE_CMD_GET_REFRESH, response, dev, buf);
+	priv = dev_get_drvdata(dev);
+	ret = generic_show(DPFE_CMD_GET_REFRESH, response, priv, buf);
 	if (ret)
 		return ret;
 
-	priv = dev_get_drvdata(dev);
-
 	info = get_msg_ptr(priv, response[MSG_ARG0], buf, &ret);
 	if (!info)
 		return ret;
@@ -632,12 +631,11 @@ static ssize_t show_vendor(struct device *dev, struct device_attribute *devattr,
 	void __iomem *info;
 	ssize_t ret;
 
-	ret = generic_show(DPFE_CMD_GET_VENDOR, response, dev, buf);
+	priv = dev_get_drvdata(dev);
+	ret = generic_show(DPFE_CMD_GET_VENDOR, response, priv, buf);
 	if (ret)
 		return ret;
 
-	priv = dev_get_drvdata(dev);
-
 	info = get_msg_ptr(priv, response[MSG_ARG0], buf, &ret);
 	if (!info)
 		return ret;
-- 
2.17.1