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SubjectRe: 2.2 / 2.4 ethernet detection order
On Tue, 5 Sep 2000, Andries Brouwer wrote:

: I described the cause on Mon, 14 Aug 2000, and soon afterwards
: priikone@poseidon.pspt.fi sent a corrected (I hope - didnt check)
: patch to l-k. (Look for: Pekka Riikonen, Re: devfs / eth micro-problems)
:
: I see that this patch didnt make it into 2.4.0test7.
: Perhaps it should be resubmitted.
:
Ok, here it is again, and is going to Alan and Linus as well:

-----snip-----
diff -uNr ./drivers/net/net_init.c ../linux-2.4-new/drivers/net/net_init.c
--- ./drivers/net/net_init.c Sat Jul 15 00:46:30 2000
+++ ../linux-2.4-new/drivers/net/net_init.c Tue Aug 22 12:28:44 2000
@@ -117,17 +117,15 @@

if (dev->name[0] == '\0' || dev->name[0] == ' ') {
strcpy(dev->name, mask);
- if (!netdev_boot_setup_check(dev)) {
- if (dev_alloc_name(dev, mask)<0) {
- if (new_device)
- kfree(dev);
- return NULL;
- }
+ if (dev_alloc_name(dev, mask)<0) {
+ if (new_device)
+ kfree(dev);
+ return NULL;
}
- } else {
- netdev_boot_setup_check(dev);
+
}
-
+ netdev_boot_setup_check(dev);
+
/*
* Configure via the caller provided setup function then
* register if needed.
diff -uNr ./net/core/dev.c ../linux-2.4-new/net/core/dev.c
--- ./net/core/dev.c Wed Jun 21 00:32:27 2000
+++ ../linux-2.4-new/net/core/dev.c Tue Aug 22 12:29:13 2000
@@ -303,28 +303,12 @@
int netdev_boot_setup_check(struct net_device *dev)
{
struct netdev_boot_setup *s;
- char buf[IFNAMSIZ + 1];
- int i, mask = 0;
-
- memset(buf, 0, sizeof(buf));
- strcpy(buf, dev->name);
- if (strchr(dev->name, '%')) {
- *strchr(buf, '%') = '\0';
- mask = 1;
- }
+ int i;

s = dev_boot_setup;
for (i = 0; i < NETDEV_BOOT_SETUP_MAX; i++) {
if (s[i].name[0] != '\0' && s[i].name[0] != ' ' &&
- !strncmp(buf, s[i].name, mask ? strlen(buf) :
- strlen(s[i].name))) {
- if (__dev_get_by_name(s[i].name)) {
- if (!mask)
- return 0;
- continue;
- }
- memset(dev->name, 0, IFNAMSIZ);
- strcpy(dev->name, s[i].name);
+ !strncmp(dev->name, s[i].name, strlen(s[i].name))) {
dev->irq = s[i].map.irq;
dev->base_addr = s[i].map.base_addr;
dev->mem_start = s[i].map.mem_start;
@@ -365,6 +349,7 @@

__setup("netdev=", netdev_boot_setup);

+
/*****************************************************************************************

Device Interface Subroutines
@@ -2481,27 +2466,26 @@
dev->iflink = -1;
dev_hold(dev);

+ /*
+ * Allocate name. If the init()
+ * fails the name will be reissued correctly.
+ */
+ if (strchr(dev->name, '%'))
+ dev_alloc_name(dev, dev->name);
+
/*
* Check boot time settings for the device.
*/
- if (!netdev_boot_setup_check(dev)) {
- /*
- * No settings found - allocate name. If the init()
- * fails the name will be reissued correctly.
- */
- if (strchr(dev->name, '%'))
- dev_alloc_name(dev, dev->name);
- }
+ netdev_boot_setup_check(dev);

if (dev->init && dev->init(dev)) {
/*
- * It failed to come up. Unhook it.
+ * It failed to come up. It will be unhooked later.
+ * dev_alloc_name can now advance to next suitable
+ * name that is checked next.
*/
- write_lock_bh(&dev_base_lock);
- *dp = dev->next;
dev->deadbeaf = 1;
- write_unlock_bh(&dev_base_lock);
- dev_put(dev);
+ dp = &dev->next;
} else {
dp = &dev->next;
dev->ifindex = dev_new_index();
@@ -2511,6 +2495,21 @@
dev->rebuild_header = default_rebuild_header;
dev_init_scheduler(dev);
set_bit(__LINK_STATE_PRESENT, &dev->state);
+ }
+ }
+
+ /*
+ * Unhook devices that failed to come up
+ */
+ dp = &dev_base;
+ while ((dev = *dp) != NULL) {
+ if (dev->deadbeaf) {
+ write_lock_bh(&dev_base_lock);
+ *dp = dev->next;
+ write_unlock_bh(&dev_base_lock);
+ dev_put(dev);
+ } else {
+ dp = &dev->next;
}
}

-----snip-----
Pekka
________________________________________________________________________
Pekka Riikonen | Email: priikone@poseidon.pspt.fi
SSH Communications Security Corp. | http://poseidon.pspt.fi/~priikone
Tel. +358 (0)40 580 6673 | Kasarmikatu 11 A4, SF-70110 Kuopio
PGP KeyID A924ED4F: http://poseidon.pspt.fi/~priikone/pubkey.asc


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