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Subject[PATCH] Re: 2.5.67: ppa driver & preempt == oops
On Sun, Apr 13, 2003 at 07:44:04PM +0200, Gert Vervoort wrote:

Here is a patch against 2.5.67, can you try it out?

I did not compile let alone run with this patch.

We never hold the host_lock while calling the detect function (unlike the
io_request_lock, see the bizzare 2.4 code), so acquiring it inside
ppa_detect is very wrong. I don't know why your scsi scan did not hang.

--- linux-2.5.67/drivers/scsi/ppa.c-orig Mon Apr 7 10:31:47 2003
+++ linux-2.5.67/drivers/scsi/ppa.c Tue Apr 15 11:54:34 2003
@@ -219,15 +219,12 @@
printk(" supported by the imm (ZIP Plus) driver. If the\n");
printk(" cable is marked with \"AutoDetect\", this is what has\n");
printk(" happened.\n");
- spin_lock_irq(hreg->host_lock);
return 0;
}
try_again = 1;
goto retry_entry;
- } else {
- spin_lock_irq(hreg->host_lock);
+ } else
return 1; /* return number of hosts detected */
- }
}

/* This is to give the ppa driver a way to modify the timings (and other
-
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