On Wed, 2007-07-25 at 11:54 -0700, Andrew Morton wrote:
> On Wed, 25 Jul 2007 04:29:33 -0700 (PDT)
> [EMAIL PROTECTED] wrote:
>
> > http://bugzilla.kernel.org/show_bug.cgi?id=8808
> >
> > Summary: Large file transfer causes kernel panic showing b44_poll
> > Product: Drivers
> > Version: 2.5
> > KernelVersion: 2.6.22.1
> > Platform: All
> > OS/Version: Linux
> > Tree: Mainline
> > Status: NEW
> > Severity: blocking
> > Priority: P1
> > Component: Network
> > AssignedTo: [EMAIL PROTECTED]
> > ReportedBy: [EMAIL PROTECTED]
> >
> >
> > Most recent kernel where this bug did not occur: /
> > Distribution: ttylinux
> > Hardware Environment: Dell Inspiron 1300
> > Problem Description:
> >
> > A large file transfer (6.5GB) (tried http with wget and plain netcat)
> > causes a
> > kernel panic after more than several GB have been transferred. However,
> > kernel
> > panic does not occur consistently. That is, it has occurred after 1.2GB,
> > 1.8GB,
> > 2.3GB and even 3.4GB transferred. Transfer never finished though.
> >
I could not repro the problem, but please give this patch a try:
diff -rup a/b44.c b/b44.c
--- a/b44.c 2007-07-31 15:31:08.000000000 -0700
+++ b/b44.c 2007-08-01 08:03:08.000000000 -0700
@@ -792,15 +792,15 @@ static int b44_rx(struct b44 *bp, int bu
goto next_pkt;
}
- if (len == 0) {
+ if (len < 5) {
int i = 0;
do {
udelay(2);
barrier();
len = le16_to_cpu(rh->len);
- } while (len == 0 && i++ < 5);
- if (len == 0)
+ } while (len < 5 && i++ < 5);
+ if (len < 5)
goto drop_it;
}
-
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