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| author | Grant Grundler <grundler@parisc-linux.org> | 2008-03-08 18:33:16 -0700 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2008-03-17 08:11:31 -0400 |
| commit | 69cac988f2d8506d0b479c5ae7903b9067d7641d (patch) | |
| tree | 0b20d0f51ea0f297777758c911c927050ba507d7 | |
| parent | 3b446c3e1592287dae117e03e61af0aa09adba6f (diff) | |
| download | linux-69cac988f2d8506d0b479c5ae7903b9067d7641d.tar.gz linux-69cac988f2d8506d0b479c5ae7903b9067d7641d.tar.bz2 linux-69cac988f2d8506d0b479c5ae7903b9067d7641d.zip | |
2.6.25-rc4 de_stop_rxtx polling wrong
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>
| -rw-r--r-- | drivers/net/tulip/de2104x.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/net/tulip/de2104x.c b/drivers/net/tulip/de2104x.c index 567c62757e9d..1b5edd646a8c 100644 --- a/drivers/net/tulip/de2104x.c +++ b/drivers/net/tulip/de2104x.c @@ -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); |