RE: [PATCH] ep93xx_eth.c: general cleanup

RE: [PATCH] ep93xx_eth.c: general cleanup

[H Hartley Sweeten]

General cleanup of the ep93xx_eth driver.

1) Use pr_fmt() to prefix the module name and __func__ to the error 
   messages.
2) <linux/io.h> instead of <asm/io.h>
3) <mach/hardware.h> instead of <mach/ep93xx-regs.h> and <mach/platform.h>
4) Remove the DRV_MODULE_NAME and DRV_MODULE_VERSION defines and just use
   the raw string data in ep93xx_get_drvinfo().
5) Move the ep93xx_mdio_read (and ep93xx_mdio_write) function to eliminate
   the function prototype.
6) Change all the printk(<level> messages to pr_<level> and remove the 
   __func__ argument.
7) Use platform_get_{resource/irq} to get the platform resources and add
   an error check.
8) Use resource_size() for request_mem_region() and ioremap().
9) Use %pM to print the MAC address at the end of the probe.
10) Use dev->dev_addr not data->dev_addr for the MAC argument because a
   random address could be used if the platform does not supply one.
11) Remove unnecessary noise in ep93xx_eth_init_module().

The message at the end of the probe is left as a printk since it displays
cleaner without the function name that would be displayed with pr_info().

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Lennert Buytenhek <kernel@wantstofly.org>
Cc: David S. Miller <davem@davemloft.net>

---

V2 - Missed the resource check and resource_size()

diff --git a/drivers/net/arm/ep93xx_eth.c b/drivers/net/arm/ep93xx_eth.c
index b25467a..c949f9a 100644
--- a/drivers/net/arm/ep93xx_eth.c
+++ b/drivers/net/arm/ep93xx_eth.c
@@ -9,6 +9,8 @@
  * (at your option) any later version.
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
+
 #include <linux/dma-mapping.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
@@ -20,12 +22,9 @@
 #include <linux/moduleparam.h>
 #include <linux/platform_device.h>
 #include <linux/delay.h>
-#include <mach/ep93xx-regs.h>
-#include <mach/platform.h>
-#include <asm/io.h>
+#include <linux/io.h>
 
-#define DRV_MODULE_NAME		"ep93xx-eth"
-#define DRV_MODULE_VERSION	"0.1"
+#include <mach/hardware.h>
 
 #define RX_QUEUE_ENTRIES	64
 #define TX_QUEUE_ENTRIES	8
@@ -185,7 +184,47 @@ struct ep93xx_priv
 #define wrw(ep, off, val)	__raw_writew((val), (ep)->base_addr + (off))
 #define wrl(ep, off, val)	__raw_writel((val), (ep)->base_addr + (off))
 
-static int ep93xx_mdio_read(struct net_device *dev, int phy_id, int reg);
+static int ep93xx_mdio_read(struct net_device *dev, int phy_id, int reg)
+{
+	struct ep93xx_priv *ep = netdev_priv(dev);
+	int data;
+	int i;
+
+	wrl(ep, REG_MIICMD, REG_MIICMD_READ | (phy_id << 5) | reg);
+
+	for (i = 0; i < 10; i++) {
+		if ((rdl(ep, REG_MIISTS) & REG_MIISTS_BUSY) == 0)
+			break;
+		msleep(1);
+	}
+
+	if (i == 10) {
+		pr_info("mdio read timed out\n");
+		data = 0xffff;
+	} else {
+		data = rdl(ep, REG_MIIDATA);
+	}
+
+	return data;
+}
+
+static void ep93xx_mdio_write(struct net_device *dev, int phy_id, int reg, int data)
+{
+	struct ep93xx_priv *ep = netdev_priv(dev);
+	int i;
+
+	wrl(ep, REG_MIIDATA, data);
+	wrl(ep, REG_MIICMD, REG_MIICMD_WRITE | (phy_id << 5) | reg);
+
+	for (i = 0; i < 10; i++) {
+		if ((rdl(ep, REG_MIISTS) & REG_MIISTS_BUSY) == 0)
+			break;
+		msleep(1);
+	}
+
+	if (i == 10)
+		pr_info("mdio write timed out\n");
+}
 
 static struct net_device_stats *ep93xx_get_stats(struct net_device *dev)
 {
@@ -217,14 +256,11 @@ static int ep93xx_rx(struct net_device *dev, int processed, int budget)
 		rstat->rstat1 = 0;
 
 		if (!(rstat0 & RSTAT0_EOF))
-			printk(KERN_CRIT "ep93xx_rx: not end-of-frame "
-					 " %.8x %.8x\n", rstat0, rstat1);
+			pr_crit("not end-of-frame %.8x %.8x\n", rstat0, rstat1);
 		if (!(rstat0 & RSTAT0_EOB))
-			printk(KERN_CRIT "ep93xx_rx: not end-of-buffer "
-					 " %.8x %.8x\n", rstat0, rstat1);
+			pr_crit("not end-of-buffer %.8x %.8x\n", rstat0, rstat1);
 		if ((rstat1 & RSTAT1_BUFFER_INDEX) >> 16 != entry)
-			printk(KERN_CRIT "ep93xx_rx: entry mismatch "
-					 " %.8x %.8x\n", rstat0, rstat1);
+			pr_crit("entry mismatch %.8x %.8x\n", rstat0, rstat1);
 
 		if (!(rstat0 & RSTAT0_RWE)) {
 			ep->stats.rx_errors++;
@@ -241,8 +277,7 @@ static int ep93xx_rx(struct net_device *dev, int processed, int budget)
 
 		length = rstat1 & RSTAT1_FRAME_LENGTH;
 		if (length > MAX_PKT_SIZE) {
-			printk(KERN_NOTICE "ep93xx_rx: invalid length "
-					 " %.8x %.8x\n", rstat0, rstat1);
+			pr_notice("invalid length %.8x %.8x\n", rstat0, rstat1);
 			goto err;
 		}
 
@@ -371,11 +406,9 @@ static void ep93xx_tx_complete(struct net_device *dev)
 		tstat->tstat0 = 0;
 
 		if (tstat0 & TSTAT0_FA)
-			printk(KERN_CRIT "ep93xx_tx_complete: frame aborted "
-					 " %.8x\n", tstat0);
+			pr_crit("frame aborted %.8x\n", tstat0);
 		if ((tstat0 & TSTAT0_BUFFER_INDEX) != entry)
-			printk(KERN_CRIT "ep93xx_tx_complete: entry mismatch "
-					 " %.8x\n", tstat0);
+			pr_crit("entry mismatch %.8x\n", tstat0);
 
 		if (tstat0 & TSTAT0_TXWE) {
 			int length = ep->descs->tdesc[entry].tdesc1 & 0xfff;
@@ -536,7 +569,7 @@ static int ep93xx_start_hw(struct net_device *dev)
 	}
 
 	if (i == 10) {
-		printk(KERN_CRIT DRV_MODULE_NAME ": hw failed to reset\n");
+		pr_crit("hw failed to reset\n");
 		return 1;
 	}
 
@@ -581,7 +614,7 @@ static int ep93xx_start_hw(struct net_device *dev)
 	}
 
 	if (i == 10) {
-		printk(KERN_CRIT DRV_MODULE_NAME ": hw failed to start\n");
+		pr_crit("hw failed to start\n");
 		return 1;
 	}
 
@@ -617,7 +650,7 @@ static void ep93xx_stop_hw(struct net_device *dev)
 	}
 
 	if (i == 10)
-		printk(KERN_CRIT DRV_MODULE_NAME ": hw failed to reset\n");
+		pr_crit("hw failed to reset\n");
 }
 
 static int ep93xx_open(struct net_device *dev)
@@ -681,52 +714,10 @@ static int ep93xx_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 	return generic_mii_ioctl(&ep->mii, data, cmd, NULL);
 }
 
-static int ep93xx_mdio_read(struct net_device *dev, int phy_id, int reg)
-{
-	struct ep93xx_priv *ep = netdev_priv(dev);
-	int data;
-	int i;
-
-	wrl(ep, REG_MIICMD, REG_MIICMD_READ | (phy_id << 5) | reg);
-
-	for (i = 0; i < 10; i++) {
-		if ((rdl(ep, REG_MIISTS) & REG_MIISTS_BUSY) == 0)
-			break;
-		msleep(1);
-	}
-
-	if (i == 10) {
-		printk(KERN_INFO DRV_MODULE_NAME ": mdio read timed out\n");
-		data = 0xffff;
-	} else {
-		data = rdl(ep, REG_MIIDATA);
-	}
-
-	return data;
-}
-
-static void ep93xx_mdio_write(struct net_device *dev, int phy_id, int reg, int data)
-{
-	struct ep93xx_priv *ep = netdev_priv(dev);
-	int i;
-
-	wrl(ep, REG_MIIDATA, data);
-	wrl(ep, REG_MIICMD, REG_MIICMD_WRITE | (phy_id << 5) | reg);
-
-	for (i = 0; i < 10; i++) {
-		if ((rdl(ep, REG_MIISTS) & REG_MIISTS_BUSY) == 0)
-			break;
-		msleep(1);
-	}
-
-	if (i == 10)
-		printk(KERN_INFO DRV_MODULE_NAME ": mdio write timed out\n");
-}
-
 static void ep93xx_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
 {
-	strcpy(info->driver, DRV_MODULE_NAME);
-	strcpy(info->version, DRV_MODULE_VERSION);
+	strcpy(info->driver, "ep93xx-eth");
+	strcpy(info->version, "0.1");
 }
 
 static int ep93xx_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
@@ -825,12 +816,19 @@ static int ep93xx_eth_probe(struct platform_device *pdev)
 	struct ep93xx_eth_data *data;
 	struct net_device *dev;
 	struct ep93xx_priv *ep;
+	struct resource *mem;
+	struct resource *irq;
 	int err;
 
 	if (pdev == NULL)
 		return -ENODEV;
 	data = pdev->dev.platform_data;
 
+	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	irq = platform_get_irq(pdev, 0);
+	if (!mem || irq < 0)
+		return -ENXIO;
+
 	dev = ep93xx_dev_alloc(data);
 	if (dev == NULL) {
 		err = -ENOMEM;
@@ -842,23 +840,21 @@ static int ep93xx_eth_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, dev);
 
-	ep->res = request_mem_region(pdev->resource[0].start,
-			pdev->resource[0].end - pdev->resource[0].start + 1,
-			dev_name(&pdev->dev));
+	ep->res = request_mem_region(mem->start, resource_size(mem),
+				     dev_name(&pdev->dev));
 	if (ep->res == NULL) {
 		dev_err(&pdev->dev, "Could not reserve memory region\n");
 		err = -ENOMEM;
 		goto err_out;
 	}
 
-	ep->base_addr = ioremap(pdev->resource[0].start,
-			pdev->resource[0].end - pdev->resource[0].start);
+	ep->base_addr = ioremap(mem->start, resource_size(mem));
 	if (ep->base_addr == NULL) {
 		dev_err(&pdev->dev, "Failed to ioremap ethernet registers\n");
 		err = -EIO;
 		goto err_out;
 	}
-	ep->irq = pdev->resource[1].start;
+	ep->irq = irq->start;
 
 	ep->mii.phy_id = data->phy_id;
 	ep->mii.phy_id_mask = 0x1f;
@@ -877,11 +873,8 @@ static int ep93xx_eth_probe(struct platform_device *pdev)
 		goto err_out;
 	}
 
-	printk(KERN_INFO "%s: ep93xx on-chip ethernet, IRQ %d, "
-			 "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x.\n", dev->name,
-			ep->irq, data->dev_addr[0], data->dev_addr[1],
-			data->dev_addr[2], data->dev_addr[3],
-			data->dev_addr[4], data->dev_addr[5]);
+	printk(KERN_INFO "%s: ep93xx on-chip ethernet, IRQ %d, %pM\n",
+			dev->name, ep->irq, dev->dev_addr);
 
 	return 0;
 
@@ -902,7 +895,6 @@ static struct platform_driver ep93xx_eth_driver = {
 
 static int __init ep93xx_eth_init_module(void)
 {
-	printk(KERN_INFO DRV_MODULE_NAME " version " DRV_MODULE_VERSION " loading\n");
 	return platform_driver_register(&ep93xx_eth_driver);
 }
  

Re: [PATCH] ep93xx_eth.c: general cleanup

[Lennert Buytenhek]

On Wed, Dec 16, 2009 at 12:29:38PM -0500, H Hartley Sweeten wrote:

> General cleanup of the ep93xx_eth driver.

Apart from keeping DRV_MODULE_NAME and DRV_MODULE_VERSION, I have
no strong opinion about this one way or the other.  So I guess that
means ACK.

RE: [PATCH] ep93xx_eth.c: general cleanup

[H Hartley Sweeten]

On Wednesday, December 16, 2009 11:02 AM, Lennert Buytenhek wrote:
> On Wed, Dec 16, 2009 at 12:29:38PM -0500, H Hartley Sweeten wrote:
>
>> General cleanup of the ep93xx_eth driver.
>
> Apart from keeping DRV_MODULE_NAME and DRV_MODULE_VERSION, I have
> no strong opinion about this one way or the other.  So I guess that
> means ACK.

I will add back the DRV_MODULE_NAME and DRV_MODULE_VERSION and repost.

What about the message in ep93xx_eth_init_module()?  Would you prefer
that one to stay?

Regards,
Hartley

Re: [PATCH] ep93xx_eth.c: general cleanup

[Lennert Buytenhek]

On Wed, Dec 16, 2009 at 01:06:10PM -0500, H Hartley Sweeten wrote:

> >> General cleanup of the ep93xx_eth driver.
> >
> > Apart from keeping DRV_MODULE_NAME and DRV_MODULE_VERSION, I have
> > no strong opinion about this one way or the other.  So I guess that
> > means ACK.
> 
> I will add back the DRV_MODULE_NAME and DRV_MODULE_VERSION and repost.
> 
> What about the message in ep93xx_eth_init_module()?  Would you prefer
> that one to stay?

Most drivers I'm familiar with print a version message when they are
first instantiated -- perhaps that makes more sense.

RE: [PATCH] ep93xx_eth.c: general cleanup

[H Hartley Sweeten]

General cleanup of the ep93xx_eth driver.

1) Use pr_fmt() to prefix the module name and __func__ to the error 
   messages.
2) <linux/io.h> instead of <asm/io.h>
3) <mach/hardware.h> instead of <mach/ep93xx-regs.h> and <mach/platform.h>
4) Move the ep93xx_mdio_read (and ep93xx_mdio_write) function to eliminate
   the function prototype.
5) Change all the printk(<level> messages to pr_<level> and remove the 
   __func__ argument.
6) Use platform_get_{resource/irq} to get the platform resources and add
   an error check.
7) Use resource_size() for request_mem_region() and ioremap().
8) Use %pM to print the MAC address at the end of the probe.
9) Use dev->dev_addr not data->dev_addr for the MAC argument because a
   random address could be used if the platform does not supply one.

The message at the end of the probe is left as a printk since it displays
cleaner without the function name that would be displayed with pr_info().

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Lennert Buytenhek <kernel@wantstofly.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: Joe Perches <joe@perches.com>

---

V2 - Missed the resource check and resource_size()
V3 - Change pr_fmt() as suggested by Joe Perches
     Don't remove DRV_MODULE_NAME and DRV_MODULE_VERSION
     Don't remove the message in ep93xx_eth_init_module()
     platform_get_irq returns an int not a resource *

diff --git a/drivers/net/arm/ep93xx_eth.c b/drivers/net/arm/ep93xx_eth.c
index b25467a..bf72d57 100644
--- a/drivers/net/arm/ep93xx_eth.c
+++ b/drivers/net/arm/ep93xx_eth.c
@@ -9,6 +9,8 @@
  * (at your option) any later version.
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
+
 #include <linux/dma-mapping.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
@@ -20,9 +22,9 @@
 #include <linux/moduleparam.h>
 #include <linux/platform_device.h>
 #include <linux/delay.h>
-#include <mach/ep93xx-regs.h>
-#include <mach/platform.h>
-#include <asm/io.h>
+#include <linux/io.h>
+
+#include <mach/hardware.h>
 
 #define DRV_MODULE_NAME		"ep93xx-eth"
 #define DRV_MODULE_VERSION	"0.1"
@@ -185,7 +187,47 @@ struct ep93xx_priv
 #define wrw(ep, off, val)	__raw_writew((val), (ep)->base_addr + (off))
 #define wrl(ep, off, val)	__raw_writel((val), (ep)->base_addr + (off))
 
-static int ep93xx_mdio_read(struct net_device *dev, int phy_id, int reg);
+static int ep93xx_mdio_read(struct net_device *dev, int phy_id, int reg)
+{
+	struct ep93xx_priv *ep = netdev_priv(dev);
+	int data;
+	int i;
+
+	wrl(ep, REG_MIICMD, REG_MIICMD_READ | (phy_id << 5) | reg);
+
+	for (i = 0; i < 10; i++) {
+		if ((rdl(ep, REG_MIISTS) & REG_MIISTS_BUSY) == 0)
+			break;
+		msleep(1);
+	}
+
+	if (i == 10) {
+		pr_info("mdio read timed out\n");
+		data = 0xffff;
+	} else {
+		data = rdl(ep, REG_MIIDATA);
+	}
+
+	return data;
+}
+
+static void ep93xx_mdio_write(struct net_device *dev, int phy_id, int reg, int data)
+{
+	struct ep93xx_priv *ep = netdev_priv(dev);
+	int i;
+
+	wrl(ep, REG_MIIDATA, data);
+	wrl(ep, REG_MIICMD, REG_MIICMD_WRITE | (phy_id << 5) | reg);
+
+	for (i = 0; i < 10; i++) {
+		if ((rdl(ep, REG_MIISTS) & REG_MIISTS_BUSY) == 0)
+			break;
+		msleep(1);
+	}
+
+	if (i == 10)
+		pr_info("mdio write timed out\n");
+}
 
 static struct net_device_stats *ep93xx_get_stats(struct net_device *dev)
 {
@@ -217,14 +259,11 @@ static int ep93xx_rx(struct net_device *dev, int processed, int budget)
 		rstat->rstat1 = 0;
 
 		if (!(rstat0 & RSTAT0_EOF))
-			printk(KERN_CRIT "ep93xx_rx: not end-of-frame "
-					 " %.8x %.8x\n", rstat0, rstat1);
+			pr_crit("not end-of-frame %.8x %.8x\n", rstat0, rstat1);
 		if (!(rstat0 & RSTAT0_EOB))
-			printk(KERN_CRIT "ep93xx_rx: not end-of-buffer "
-					 " %.8x %.8x\n", rstat0, rstat1);
+			pr_crit("not end-of-buffer %.8x %.8x\n", rstat0, rstat1);
 		if ((rstat1 & RSTAT1_BUFFER_INDEX) >> 16 != entry)
-			printk(KERN_CRIT "ep93xx_rx: entry mismatch "
-					 " %.8x %.8x\n", rstat0, rstat1);
+			pr_crit("entry mismatch %.8x %.8x\n", rstat0, rstat1);
 
 		if (!(rstat0 & RSTAT0_RWE)) {
 			ep->stats.rx_errors++;
@@ -241,8 +280,7 @@ static int ep93xx_rx(struct net_device *dev, int processed, int budget)
 
 		length = rstat1 & RSTAT1_FRAME_LENGTH;
 		if (length > MAX_PKT_SIZE) {
-			printk(KERN_NOTICE "ep93xx_rx: invalid length "
-					 " %.8x %.8x\n", rstat0, rstat1);
+			pr_notice("invalid length %.8x %.8x\n", rstat0, rstat1);
 			goto err;
 		}
 
@@ -371,11 +409,9 @@ static void ep93xx_tx_complete(struct net_device *dev)
 		tstat->tstat0 = 0;
 
 		if (tstat0 & TSTAT0_FA)
-			printk(KERN_CRIT "ep93xx_tx_complete: frame aborted "
-					 " %.8x\n", tstat0);
+			pr_crit("frame aborted %.8x\n", tstat0);
 		if ((tstat0 & TSTAT0_BUFFER_INDEX) != entry)
-			printk(KERN_CRIT "ep93xx_tx_complete: entry mismatch "
-					 " %.8x\n", tstat0);
+			pr_crit("entry mismatch %.8x\n", tstat0);
 
 		if (tstat0 & TSTAT0_TXWE) {
 			int length = ep->descs->tdesc[entry].tdesc1 & 0xfff;
@@ -536,7 +572,7 @@ static int ep93xx_start_hw(struct net_device *dev)
 	}
 
 	if (i == 10) {
-		printk(KERN_CRIT DRV_MODULE_NAME ": hw failed to reset\n");
+		pr_crit("hw failed to reset\n");
 		return 1;
 	}
 
@@ -581,7 +617,7 @@ static int ep93xx_start_hw(struct net_device *dev)
 	}
 
 	if (i == 10) {
-		printk(KERN_CRIT DRV_MODULE_NAME ": hw failed to start\n");
+		pr_crit("hw failed to start\n");
 		return 1;
 	}
 
@@ -617,7 +653,7 @@ static void ep93xx_stop_hw(struct net_device *dev)
 	}
 
 	if (i == 10)
-		printk(KERN_CRIT DRV_MODULE_NAME ": hw failed to reset\n");
+		pr_crit("hw failed to reset\n");
 }
 
 static int ep93xx_open(struct net_device *dev)
@@ -681,48 +717,6 @@ static int ep93xx_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 	return generic_mii_ioctl(&ep->mii, data, cmd, NULL);
 }
 
-static int ep93xx_mdio_read(struct net_device *dev, int phy_id, int reg)
-{
-	struct ep93xx_priv *ep = netdev_priv(dev);
-	int data;
-	int i;
-
-	wrl(ep, REG_MIICMD, REG_MIICMD_READ | (phy_id << 5) | reg);
-
-	for (i = 0; i < 10; i++) {
-		if ((rdl(ep, REG_MIISTS) & REG_MIISTS_BUSY) == 0)
-			break;
-		msleep(1);
-	}
-
-	if (i == 10) {
-		printk(KERN_INFO DRV_MODULE_NAME ": mdio read timed out\n");
-		data = 0xffff;
-	} else {
-		data = rdl(ep, REG_MIIDATA);
-	}
-
-	return data;
-}
-
-static void ep93xx_mdio_write(struct net_device *dev, int phy_id, int reg, int data)
-{
-	struct ep93xx_priv *ep = netdev_priv(dev);
-	int i;
-
-	wrl(ep, REG_MIIDATA, data);
-	wrl(ep, REG_MIICMD, REG_MIICMD_WRITE | (phy_id << 5) | reg);
-
-	for (i = 0; i < 10; i++) {
-		if ((rdl(ep, REG_MIISTS) & REG_MIISTS_BUSY) == 0)
-			break;
-		msleep(1);
-	}
-
-	if (i == 10)
-		printk(KERN_INFO DRV_MODULE_NAME ": mdio write timed out\n");
-}
-
 static void ep93xx_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
 {
 	strcpy(info->driver, DRV_MODULE_NAME);
@@ -825,12 +819,19 @@ static int ep93xx_eth_probe(struct platform_device *pdev)
 	struct ep93xx_eth_data *data;
 	struct net_device *dev;
 	struct ep93xx_priv *ep;
+	struct resource *mem;
+	int irq;
 	int err;
 
 	if (pdev == NULL)
 		return -ENODEV;
 	data = pdev->dev.platform_data;
 
+	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	irq = platform_get_irq(pdev, 0);
+	if (!mem || irq < 0)
+		return -ENXIO;
+
 	dev = ep93xx_dev_alloc(data);
 	if (dev == NULL) {
 		err = -ENOMEM;
@@ -842,23 +843,21 @@ static int ep93xx_eth_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, dev);
 
-	ep->res = request_mem_region(pdev->resource[0].start,
-			pdev->resource[0].end - pdev->resource[0].start + 1,
-			dev_name(&pdev->dev));
+	ep->res = request_mem_region(mem->start, resource_size(mem),
+				     dev_name(&pdev->dev));
 	if (ep->res == NULL) {
 		dev_err(&pdev->dev, "Could not reserve memory region\n");
 		err = -ENOMEM;
 		goto err_out;
 	}
 
-	ep->base_addr = ioremap(pdev->resource[0].start,
-			pdev->resource[0].end - pdev->resource[0].start);
+	ep->base_addr = ioremap(mem->start, resource_size(mem));
 	if (ep->base_addr == NULL) {
 		dev_err(&pdev->dev, "Failed to ioremap ethernet registers\n");
 		err = -EIO;
 		goto err_out;
 	}
-	ep->irq = pdev->resource[1].start;
+	ep->irq = irq;
 
 	ep->mii.phy_id = data->phy_id;
 	ep->mii.phy_id_mask = 0x1f;
@@ -877,11 +876,8 @@ static int ep93xx_eth_probe(struct platform_device *pdev)
 		goto err_out;
 	}
 
-	printk(KERN_INFO "%s: ep93xx on-chip ethernet, IRQ %d, "
-			 "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x.\n", dev->name,
-			ep->irq, data->dev_addr[0], data->dev_addr[1],
-			data->dev_addr[2], data->dev_addr[3],
-			data->dev_addr[4], data->dev_addr[5]);
+	printk(KERN_INFO "%s: ep93xx on-chip ethernet, IRQ %d, %pM\n",
+			dev->name, ep->irq, dev->dev_addr);
 
 	return 0;
  

Re: [PATCH] ep93xx_eth.c: general cleanup

[Lennert Buytenhek]

On Wed, Dec 16, 2009 at 01:18:13PM -0500, H Hartley Sweeten wrote:

> V3 - Change pr_fmt() as suggested by Joe Perches
>      Don't remove DRV_MODULE_NAME and DRV_MODULE_VERSION
>      Don't remove the message in ep93xx_eth_init_module()

That's not what I meant, but alright, as you prefer.

RE: [PATCH] ep93xx_eth.c: general cleanup

[H Hartley Sweeten]

Wednesday, December 16, 2009 11:32 AM, Lennert Buytenhek wrote:
> On Wed, Dec 16, 2009 at 01:18:13PM -0500, H Hartley Sweeten wrote:
>
>> V3 - Change pr_fmt() as suggested by Joe Perches
>>      Don't remove DRV_MODULE_NAME and DRV_MODULE_VERSION
>>      Don't remove the message in ep93xx_eth_init_module()
>
> That's not what I meant, but alright, as you prefer.

Guess my parser is off line today.... ;-)

What did you mean?

Regards,
Hartley

Re: [PATCH] ep93xx_eth.c: general cleanup

[David Miller]

From: "H Hartley Sweeten" <hartleys@visionengravers.com>
Date: Wed, 16 Dec 2009 13:34:55 -0500

> Wednesday, December 16, 2009 11:32 AM, Lennert Buytenhek wrote:
>> On Wed, Dec 16, 2009 at 01:18:13PM -0500, H Hartley Sweeten wrote:
>>
>>> V3 - Change pr_fmt() as suggested by Joe Perches
>>>      Don't remove DRV_MODULE_NAME and DRV_MODULE_VERSION
>>>      Don't remove the message in ep93xx_eth_init_module()
>>
>> That's not what I meant, but alright, as you prefer.
> 
> Guess my parser is off line today.... ;-)
> 
> What did you mean?

This patch also doesn't apply to current sources, so if you
could also please respin this once you've resolved the feedback
that would be great.

Thanks.

RE: [PATCH] ep93xx_eth.c: general cleanup

[H Hartley Sweeten]

On Wednesday, December 23, 2009 3:15 PM, David Miller wrote:
> From: "H Hartley Sweeten" <hartleys@visionengravers.com>
> Date: Wed, 16 Dec 2009 13:34:55 -0500
>
>> Wednesday, December 16, 2009 11:32 AM, Lennert Buytenhek wrote:
>>> On Wed, Dec 16, 2009 at 01:18:13PM -0500, H Hartley Sweeten wrote:
>>>
>>>> V3 - Change pr_fmt() as suggested by Joe Perches
>>>>      Don't remove DRV_MODULE_NAME and DRV_MODULE_VERSION
>>>>      Don't remove the message in ep93xx_eth_init_module()
>>>
>>> That's not what I meant, but alright, as you prefer.
>> 
>> Guess my parser is off line today.... ;-)
>> 
>> What did you mean?
>
> This patch also doesn't apply to current sources, so if you
> could also please respin this once you've resolved the feedback
> that would be great.

Lennert,

Since I need to respin this patch what did you mean by this comment?

On Wednesday, December 16, 2009 11:09 AM, Lennert Buytenhek wrote:
> On Wed, Dec 16, 2009 at 01:06:10PM -0500, H Hartley Sweeten wrote:
>
>>>> General cleanup of the ep93xx_eth driver.
>>>
>>> Apart from keeping DRV_MODULE_NAME and DRV_MODULE_VERSION, I have
>>> no strong opinion about this one way or the other.  So I guess that
>>> means ACK.
>> 
>> I will add back the DRV_MODULE_NAME and DRV_MODULE_VERSION and repost.
>> 
>> What about the message in ep93xx_eth_init_module()?  Would you prefer
>> that one to stay?
>
> Most drivers I'm familiar with print a version message when they are
> first instantiated -- perhaps that makes more sense.

I will wait for your reply before updating the patch.

Thanks,
Hartley

Re: [PATCH] ep93xx_eth.c: general cleanup

[Lennert Buytenhek]

On Wed, Dec 30, 2009 at 01:03:00PM -0500, H Hartley Sweeten wrote:

> >> Wednesday, December 16, 2009 11:32 AM, Lennert Buytenhek wrote:
> >>> On Wed, Dec 16, 2009 at 01:18:13PM -0500, H Hartley Sweeten wrote:
> >>>
> >>>> V3 - Change pr_fmt() as suggested by Joe Perches
> >>>>      Don't remove DRV_MODULE_NAME and DRV_MODULE_VERSION
> >>>>      Don't remove the message in ep93xx_eth_init_module()
> >>>
> >>> That's not what I meant, but alright, as you prefer.
> >> 
> >> Guess my parser is off line today.... ;-)
> >> 
> >> What did you mean?
> >
> > This patch also doesn't apply to current sources, so if you
> > could also please respin this once you've resolved the feedback
> > that would be great.
> 
> Lennert,

Hi Hartley,


> Since I need to respin this patch what did you mean by this comment?
> 
> On Wednesday, December 16, 2009 11:09 AM, Lennert Buytenhek wrote:
> > On Wed, Dec 16, 2009 at 01:06:10PM -0500, H Hartley Sweeten wrote:
> >
> >>>> General cleanup of the ep93xx_eth driver.
> >>>
> >>> Apart from keeping DRV_MODULE_NAME and DRV_MODULE_VERSION, I have
> >>> no strong opinion about this one way or the other.  So I guess that
> >>> means ACK.
> >> 
> >> I will add back the DRV_MODULE_NAME and DRV_MODULE_VERSION and repost.
> >> 
> >> What about the message in ep93xx_eth_init_module()?  Would you prefer
> >> that one to stay?
> >
> > Most drivers I'm familiar with print a version message when they are
> > first instantiated -- perhaps that makes more sense.
> 
> I will wait for your reply before updating the patch.

What I meant was, most drivers seem to print a message at probe
time, i.e. when they are attached to an actual device for the first
time.

Grepping for 'printed_version' in drivers/net/* actually turns up
two variants:
- Print the version message on the first probe.  (e.g. 3c59x)
- Print the version message at module load time if we were built as
  a module, while if we were built into the kernel, only print a
  version message on the first probe.  (e.g. 8139too)

At least in the case of ep93xx_eth, you can't even have it enabled if
you're not building a kernel specifically for the ep93xx ARM SoC, and
if you are building for the ep93xx, as far as I know we don't support
any boards that don't have the ethernet brought out and so you're very
likely to have ep93xx_eth enabled then, so whether you do it
unconditionally at driver init time or at probe time will make no
effective difference for the majority of cases.

I.e. I can't really say I care much either way.


cheers,
Lennert

RE: [PATCH] ep93xx_eth.c: general cleanup

[H Hartley Sweeten]

On Wednesday, December 16, 2009 10:32 AM, Joe Perches wrote:

Added netdev to the Cc: list, and removed Nick M. (unintended)

> On Wed, 2009-12-16 at 12:09 -0500, H Hartley Sweeten wrote:
>> +#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
>
> I think KBUILD_MODNAME ":%s: " fmt, __func__
> or its equivalent direct use is more common.
> It's possibly useful to standardize.

I wasn't sure about that and could not find anything "standard" in mainline.
The biggest user of pr_fmt that I could find is in drivers/s390 and that
uses a local KMSG_COMPONENT define instead of KBUILD_MODNAME.

>> -#define DRV_MODULE_NAME		"ep93xx-eth"
>> -#define DRV_MODULE_VERSION	"0.1"
>> +#include <mach/hardware.h>
>
> I think these sorts of defines are common and useful.

I can add those back if needed.  Just seemed a waste to have the two defines
and only use them in one place.

>>  static int __init ep93xx_eth_init_module(void)
>>  {
>> -	printk(KERN_INFO DRV_MODULE_NAME " version " DRV_MODULE_VERSION " loading\n");
>
> Why remove this printk completely?

In my dmesg is just looks like noise.

ep93xx-eth version 0.1 loading
eth0: ep93xx on-chip ethernet, IRQ 39, 00:21:f5:00:00:17

If the drive loads correctly you will get the second line.  If it error's for
some reason you will get one of the dev_err messages.

But, if the defines go back in I can also add this message back.

Regards,
Hartley

[PATCH] ep93xx_eth.c general cleanup

[H Hartley Sweeten]

General cleanup of the ep93xx_eth driver.

1) Use pr_fmt() to prefix the module name and __func__ to the error 
   messages.
2) <linux/io.h> instead of <asm/io.h>
3) <mach/hardware.h> instead of <mach/ep93xx-regs.h> and <mach/platform.h>
4) Move the ep93xx_mdio_read (and ep93xx_mdio_write) function to eliminate
   the function prototype.
5) Change all the printk(<level> messages to pr_<level> and remove the 
   __func__ argument.
6) Use platform_get_{resource/irq} to get the platform resources and add
   an error check.
7) Use resource_size() for request_mem_region() and ioremap().
8) Use %pM to print the MAC address at the end of the probe.
9) Use dev->dev_addr not data->dev_addr for the MAC argument because a
   random address could be used if the platform does not supply one.

The message at the end of the probe is left as a printk since it displays
cleaner without the function name that would be displayed with pr_info().

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Lennert Buytenhek <kernel@wantstofly.org>
Cc: David S. Miller <davem@davemloft.net>

---

Repost due to merge issue.

diff --git a/drivers/net/arm/ep93xx_eth.c b/drivers/net/arm/ep93xx_eth.c
index b25467a..bf72d57 100644
--- a/drivers/net/arm/ep93xx_eth.c
+++ b/drivers/net/arm/ep93xx_eth.c
@@ -9,6 +9,8 @@
  * (at your option) any later version.
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
+
 #include <linux/dma-mapping.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
@@ -20,9 +22,9 @@
 #include <linux/moduleparam.h>
 #include <linux/platform_device.h>
 #include <linux/delay.h>
-#include <mach/ep93xx-regs.h>
-#include <mach/platform.h>
-#include <asm/io.h>
+#include <linux/io.h>
+
+#include <mach/hardware.h>
 
 #define DRV_MODULE_NAME		"ep93xx-eth"
 #define DRV_MODULE_VERSION	"0.1"
@@ -185,7 +187,47 @@ struct ep93xx_priv
 #define wrw(ep, off, val)	__raw_writew((val), (ep)->base_addr + (off))
 #define wrl(ep, off, val)	__raw_writel((val), (ep)->base_addr + (off))
 
-static int ep93xx_mdio_read(struct net_device *dev, int phy_id, int reg);
+static int ep93xx_mdio_read(struct net_device *dev, int phy_id, int reg)
+{
+	struct ep93xx_priv *ep = netdev_priv(dev);
+	int data;
+	int i;
+
+	wrl(ep, REG_MIICMD, REG_MIICMD_READ | (phy_id << 5) | reg);
+
+	for (i = 0; i < 10; i++) {
+		if ((rdl(ep, REG_MIISTS) & REG_MIISTS_BUSY) == 0)
+			break;
+		msleep(1);
+	}
+
+	if (i == 10) {
+		pr_info("mdio read timed out\n");
+		data = 0xffff;
+	} else {
+		data = rdl(ep, REG_MIIDATA);
+	}
+
+	return data;
+}
+
+static void ep93xx_mdio_write(struct net_device *dev, int phy_id, int reg, int data)
+{
+	struct ep93xx_priv *ep = netdev_priv(dev);
+	int i;
+
+	wrl(ep, REG_MIIDATA, data);
+	wrl(ep, REG_MIICMD, REG_MIICMD_WRITE | (phy_id << 5) | reg);
+
+	for (i = 0; i < 10; i++) {
+		if ((rdl(ep, REG_MIISTS) & REG_MIISTS_BUSY) == 0)
+			break;
+		msleep(1);
+	}
+
+	if (i == 10)
+		pr_info("mdio write timed out\n");
+}
 
 static struct net_device_stats *ep93xx_get_stats(struct net_device *dev)
 {
@@ -217,14 +259,11 @@ static int ep93xx_rx(struct net_device *dev, int processed, int budget)
 		rstat->rstat1 = 0;
 
 		if (!(rstat0 & RSTAT0_EOF))
-			printk(KERN_CRIT "ep93xx_rx: not end-of-frame "
-					 " %.8x %.8x\n", rstat0, rstat1);
+			pr_crit("not end-of-frame %.8x %.8x\n", rstat0, rstat1);
 		if (!(rstat0 & RSTAT0_EOB))
-			printk(KERN_CRIT "ep93xx_rx: not end-of-buffer "
-					 " %.8x %.8x\n", rstat0, rstat1);
+			pr_crit("not end-of-buffer %.8x %.8x\n", rstat0, rstat1);
 		if ((rstat1 & RSTAT1_BUFFER_INDEX) >> 16 != entry)
-			printk(KERN_CRIT "ep93xx_rx: entry mismatch "
-					 " %.8x %.8x\n", rstat0, rstat1);
+			pr_crit("entry mismatch %.8x %.8x\n", rstat0, rstat1);
 
 		if (!(rstat0 & RSTAT0_RWE)) {
 			ep->stats.rx_errors++;
@@ -241,8 +280,7 @@ static int ep93xx_rx(struct net_device *dev, int processed, int budget)
 
 		length = rstat1 & RSTAT1_FRAME_LENGTH;
 		if (length > MAX_PKT_SIZE) {
-			printk(KERN_NOTICE "ep93xx_rx: invalid length "
-					 " %.8x %.8x\n", rstat0, rstat1);
+			pr_notice("invalid length %.8x %.8x\n", rstat0, rstat1);
 			goto err;
 		}
 
@@ -371,11 +409,9 @@ static void ep93xx_tx_complete(struct net_device *dev)
 		tstat->tstat0 = 0;
 
 		if (tstat0 & TSTAT0_FA)
-			printk(KERN_CRIT "ep93xx_tx_complete: frame aborted "
-					 " %.8x\n", tstat0);
+			pr_crit("frame aborted %.8x\n", tstat0);
 		if ((tstat0 & TSTAT0_BUFFER_INDEX) != entry)
-			printk(KERN_CRIT "ep93xx_tx_complete: entry mismatch "
-					 " %.8x\n", tstat0);
+			pr_crit("entry mismatch %.8x\n", tstat0);
 
 		if (tstat0 & TSTAT0_TXWE) {
 			int length = ep->descs->tdesc[entry].tdesc1 & 0xfff;
@@ -536,7 +572,7 @@ static int ep93xx_start_hw(struct net_device *dev)
 	}
 
 	if (i == 10) {
-		printk(KERN_CRIT DRV_MODULE_NAME ": hw failed to reset\n");
+		pr_crit("hw failed to reset\n");
 		return 1;
 	}
 
@@ -581,7 +617,7 @@ static int ep93xx_start_hw(struct net_device *dev)
 	}
 
 	if (i == 10) {
-		printk(KERN_CRIT DRV_MODULE_NAME ": hw failed to start\n");
+		pr_crit("hw failed to start\n");
 		return 1;
 	}
 
@@ -617,7 +653,7 @@ static void ep93xx_stop_hw(struct net_device *dev)
 	}
 
 	if (i == 10)
-		printk(KERN_CRIT DRV_MODULE_NAME ": hw failed to reset\n");
+		pr_crit("hw failed to reset\n");
 }
 
 static int ep93xx_open(struct net_device *dev)
@@ -681,48 +717,6 @@ static int ep93xx_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 	return generic_mii_ioctl(&ep->mii, data, cmd, NULL);
 }
 
-static int ep93xx_mdio_read(struct net_device *dev, int phy_id, int reg)
-{
-	struct ep93xx_priv *ep = netdev_priv(dev);
-	int data;
-	int i;
-
-	wrl(ep, REG_MIICMD, REG_MIICMD_READ | (phy_id << 5) | reg);
-
-	for (i = 0; i < 10; i++) {
-		if ((rdl(ep, REG_MIISTS) & REG_MIISTS_BUSY) == 0)
-			break;
-		msleep(1);
-	}
-
-	if (i == 10) {
-		printk(KERN_INFO DRV_MODULE_NAME ": mdio read timed out\n");
-		data = 0xffff;
-	} else {
-		data = rdl(ep, REG_MIIDATA);
-	}
-
-	return data;
-}
-
-static void ep93xx_mdio_write(struct net_device *dev, int phy_id, int reg, int data)
-{
-	struct ep93xx_priv *ep = netdev_priv(dev);
-	int i;
-
-	wrl(ep, REG_MIIDATA, data);
-	wrl(ep, REG_MIICMD, REG_MIICMD_WRITE | (phy_id << 5) | reg);
-
-	for (i = 0; i < 10; i++) {
-		if ((rdl(ep, REG_MIISTS) & REG_MIISTS_BUSY) == 0)
-			break;
-		msleep(1);
-	}
-
-	if (i == 10)
-		printk(KERN_INFO DRV_MODULE_NAME ": mdio write timed out\n");
-}
-
 static void ep93xx_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
 {
 	strcpy(info->driver, DRV_MODULE_NAME);
@@ -825,12 +819,19 @@ static int ep93xx_eth_probe(struct platform_device *pdev)
 	struct ep93xx_eth_data *data;
 	struct net_device *dev;
 	struct ep93xx_priv *ep;
+	struct resource *mem;
+	int irq;
 	int err;
 
 	if (pdev == NULL)
 		return -ENODEV;
 	data = pdev->dev.platform_data;
 
+	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	irq = platform_get_irq(pdev, 0);
+	if (!mem || irq < 0)
+		return -ENXIO;
+
 	dev = ep93xx_dev_alloc(data);
 	if (dev == NULL) {
 		err = -ENOMEM;
@@ -842,23 +843,21 @@ static int ep93xx_eth_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, dev);
 
-	ep->res = request_mem_region(pdev->resource[0].start,
-			pdev->resource[0].end - pdev->resource[0].start + 1,
-			dev_name(&pdev->dev));
+	ep->res = request_mem_region(mem->start, resource_size(mem),
+				     dev_name(&pdev->dev));
 	if (ep->res == NULL) {
 		dev_err(&pdev->dev, "Could not reserve memory region\n");
 		err = -ENOMEM;
 		goto err_out;
 	}
 
-	ep->base_addr = ioremap(pdev->resource[0].start,
-			pdev->resource[0].end - pdev->resource[0].start);
+	ep->base_addr = ioremap(mem->start, resource_size(mem));
 	if (ep->base_addr == NULL) {
 		dev_err(&pdev->dev, "Failed to ioremap ethernet registers\n");
 		err = -EIO;
 		goto err_out;
 	}
-	ep->irq = pdev->resource[1].start;
+	ep->irq = irq;
 
 	ep->mii.phy_id = data->phy_id;
 	ep->mii.phy_id_mask = 0x1f;
@@ -877,11 +876,8 @@ static int ep93xx_eth_probe(struct platform_device *pdev)
 		goto err_out;
 	}
 
-	printk(KERN_INFO "%s: ep93xx on-chip ethernet, IRQ %d, "
-			 "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x.\n", dev->name,
-			ep->irq, data->dev_addr[0], data->dev_addr[1],
-			data->dev_addr[2], data->dev_addr[3],
-			data->dev_addr[4], data->dev_addr[5]);
+	printk(KERN_INFO "%s: ep93xx on-chip ethernet, IRQ %d, %pM\n",
+			dev->name, ep->irq, dev->dev_addr);
 
 	return 0;
 

Re: [PATCH] ep93xx_eth.c general cleanup

[David Miller]

From: H Hartley Sweeten <hartleys@visionengravers.com>
Date: Tue, 5 Jan 2010 14:05:31 -0700

> General cleanup of the ep93xx_eth driver.
> 
> 1) Use pr_fmt() to prefix the module name and __func__ to the error 
>    messages.
> 2) <linux/io.h> instead of <asm/io.h>
> 3) <mach/hardware.h> instead of <mach/ep93xx-regs.h> and <mach/platform.h>
> 4) Move the ep93xx_mdio_read (and ep93xx_mdio_write) function to eliminate
>    the function prototype.
> 5) Change all the printk(<level> messages to pr_<level> and remove the 
>    __func__ argument.
> 6) Use platform_get_{resource/irq} to get the platform resources and add
>    an error check.
> 7) Use resource_size() for request_mem_region() and ioremap().
> 8) Use %pM to print the MAC address at the end of the probe.
> 9) Use dev->dev_addr not data->dev_addr for the MAC argument because a
>    random address could be used if the platform does not supply one.
> 
> The message at the end of the probe is left as a printk since it displays
> cleaner without the function name that would be displayed with pr_info().
> 
> Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
> Acked-by: Lennert Buytenhek <kernel@wantstofly.org>

Applied, thanks.