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2.6.25-rc4 de_stop_rxtx polling wrong

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This untested patch _should_ fix:
	"(net de2104x) Kernel panic with de2104x tulip driver on boot"
	http://bugzilla.kernel.org/show_bug.cgi?id=3156

But the bug submitter isn't responding.  Same fix has been applied
to tulip.c (several years ago) and uli526x.c (Feb 2008) drivers.

[ The panic reported in the bug report was removed in a recently
  (march 2008) accepted patch from Ondrej Zary. ]

Signed-off-by: Grant Grundler <grundler@parisc-linux.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Grant Grundler 2008-03-08 18:33:16 -07:00 committed by Jeff Garzik
parent 3b446c3e15
commit 69cac988f2
1 changed files with 7 additions and 3 deletions
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10
drivers/net/tulip/de2104x.c
View file

@ -842,7 +842,7 @@ static inline int de_is_running (struct de_private *de)
static void de_stop_rxtx (struct de_private *de)
{
u32 macmode;
unsigned int work = 1000;
unsigned int i = 1300/100;
macmode = dr32(MacMode);
if (macmode & RxTx) {
@ -850,10 +850,14 @@ static void de_stop_rxtx (struct de_private *de)
dr32(MacMode);
}
while (--work > 0) {
/* wait until in-flight frame completes.
* Max time @ 10BT: 1500*8b/10Mbps == 1200us (+ 100us margin)
* Typically expect this loop to end in < 50 us on 100BT.
*/
while (--i) {
if (!de_is_running(de))
return;
cpu_relax();
udelay(100);
}
printk(KERN_WARNING "%s: timeout expired stopping DMA\n", de->dev->name);