From: Dan Carpenter <error27@gmail.com>
To: Florian Fainelli <florian@openwrt.org>
Cc: "David S. Miller" <davem@davemloft.net>,
Jiri Pirko <jpirko@redhat.com>,
Eric Dumazet <eric.dumazet@gmail.com>,
netdev@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [patch] cpmac: use resource_size()
Date: Mon, 28 Jun 2010 23:19:33 +0200 [thread overview]
Message-ID: <20100628211933.GL19184@bicker> (raw)
The original code is off by one because we should start counting at
zero. So the size of the resource is end - start + 1. I switched it to
use resource_size() to do the calculation.
Signed-off-by: Dan Carpenter <error27@gmail.com>
---
I don't have a cross compile environment, so I can't even compile test
this. Sorry.
diff --git a/drivers/net/cpmac.c b/drivers/net/cpmac.c
index 23786ee..38de1a4 100644
--- a/drivers/net/cpmac.c
+++ b/drivers/net/cpmac.c
@@ -964,7 +964,7 @@ static int cpmac_open(struct net_device *dev)
struct sk_buff *skb;
mem = platform_get_resource_byname(priv->pdev, IORESOURCE_MEM, "regs");
- if (!request_mem_region(mem->start, mem->end - mem->start, dev->name)) {
+ if (!request_mem_region(mem->start, resource_size(mem), dev->name)) {
if (netif_msg_drv(priv))
printk(KERN_ERR "%s: failed to request registers\n",
dev->name);
@@ -972,7 +972,7 @@ static int cpmac_open(struct net_device *dev)
goto fail_reserve;
}
- priv->regs = ioremap(mem->start, mem->end - mem->start);
+ priv->regs = ioremap(mem->start, resource_size(mem));
if (!priv->regs) {
if (netif_msg_drv(priv))
printk(KERN_ERR "%s: failed to remap registers\n",
@@ -1049,7 +1049,7 @@ fail_alloc:
iounmap(priv->regs);
fail_remap:
- release_mem_region(mem->start, mem->end - mem->start);
+ release_mem_region(mem->start, resource_size(mem));
fail_reserve:
return res;
@@ -1077,7 +1077,7 @@ static int cpmac_stop(struct net_device *dev)
free_irq(dev->irq, dev);
iounmap(priv->regs);
mem = platform_get_resource_byname(priv->pdev, IORESOURCE_MEM, "regs");
- release_mem_region(mem->start, mem->end - mem->start);
+ release_mem_region(mem->start, resource_size(mem));
priv->rx_head = &priv->desc_ring[CPMAC_QUEUES];
for (i = 0; i < priv->ring_size; i++) {
if (priv->rx_head[i].skb) {
next reply other threads:[~2010-06-28 21:21 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-28 21:19 Dan Carpenter [this message]
2010-06-30 20:12 ` [patch] cpmac: use resource_size() David Miller
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