From: Ben Dooks <ben-linux@fluff.org>
Date: Tue, 5 Feb 2008 00:02:08 +0000 (+0000)
Subject: DM9000: Use msleep() instead of udelay()
X-Git-Tag: v2.6.25-rc2~2^2~31^2~26
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=321f69a4c3bb807abdf1fd6329403ec0449a3d78;p=linux-2.6

DM9000: Use msleep() instead of udelay()

We can use sleeping functions when reading and writing the
PHY registers, so let us sleep instead of busy waiting for
the PHY.

Note, this also fixes a bug reading the PHY where only 100uS
was being used instead of 150uS

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---

diff --git a/drivers/net/dm9000.c b/drivers/net/dm9000.c
index 071aad1af5..2e0add0748 100644
--- a/drivers/net/dm9000.c
+++ b/drivers/net/dm9000.c
@@ -116,6 +116,7 @@ typedef struct board_info {
 	u8 io_mode;		/* 0:word, 2:byte */
 	u8 phy_addr;
 	unsigned int flags;
+	unsigned int in_suspend :1;
 
 	int debug_level;
 
@@ -1107,6 +1108,18 @@ dm9000_hash_table(struct net_device *dev)
 }
 
 
+/*
+ * Sleep, either by using msleep() or if we are suspending, then
+ * use mdelay() to sleep.
+ */
+static void dm9000_msleep(board_info_t *db, unsigned int ms)
+{
+	if (db->in_suspend)
+		mdelay(ms);
+	else
+		msleep(ms);
+}
+
 /*
  *   Read a word from phyxcer
  */
@@ -1131,7 +1144,7 @@ dm9000_phy_read(struct net_device *dev, int phy_reg_unused, int reg)
 	writeb(reg_save, db->io_addr);
 	spin_unlock_irqrestore(&db->lock,flags);
 
-	udelay(100);		/* Wait read complete */
+	dm9000_msleep(db, 1);		/* Wait read complete */
 
 	spin_lock_irqsave(&db->lock,flags);
 	reg_save = readb(db->io_addr);
@@ -1175,7 +1188,7 @@ dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg, int value)
 	writeb(reg_save, db->io_addr);
 	spin_unlock_irqrestore(&db->lock,flags);
 
-	udelay(500);		/* Wait write complete */
+	dm9000_msleep(db, 1);		/* Wait write complete */
 
 	spin_lock_irqsave(&db->lock,flags);
 	reg_save = readb(db->io_addr);
@@ -1192,8 +1205,12 @@ static int
 dm9000_drv_suspend(struct platform_device *dev, pm_message_t state)
 {
 	struct net_device *ndev = platform_get_drvdata(dev);
+	board_info_t *db;
 
 	if (ndev) {
+		db = (board_info_t *) ndev->priv;
+		db->in_suspend = 1;
+
 		if (netif_running(ndev)) {
 			netif_device_detach(ndev);
 			dm9000_shutdown(ndev);
@@ -1216,6 +1233,8 @@ dm9000_drv_resume(struct platform_device *dev)
 
 			netif_device_attach(ndev);
 		}
+
+		db->in_suspend = 0;
 	}
 	return 0;
 }