Re: b44: regression in 2.6.22 (resend)
From: Michael Buesch <hidden>
Date: 2007-05-28 10:51:42
Also in:
linux-wireless, lkml
Can you also test the following patch? I think there's a bug in b44 that is doesn't properly discard shared IRQs, so it might possibly generate a NAPI storm, dunno. Worth a try. Index: linux-2.6.22-rc3/drivers/net/b44.c ===================================================================
--- linux-2.6.22-rc3.orig/drivers/net/b44.c 2007-05-27 23:01:44.000000000 +0200
+++ linux-2.6.22-rc3/drivers/net/b44.c 2007-05-28 12:48:27.000000000 +0200@@ -911,6 +911,8 @@ static irqreturn_t b44_interrupt(int irq spin_lock(&bp->lock); istat = br32(bp, B44_ISTAT); + if (istat == 0xFFFFFFFF) + goto out; /* Shared IRQ not for us */ imask = br32(bp, B44_IMASK); /* The interrupt mask register controls which interrupt bits
@@ -942,6 +944,7 @@ irq_ack: bw32(bp, B44_ISTAT, istat); br32(bp, B44_ISTAT); } +out: spin_unlock(&bp->lock); return IRQ_RETVAL(handled); }
--
Greetings Michael.