Message-ID: <3A192EBC.F5B048F2@cyberplat.ru>
Date: Mon, 20 Nov 2000 17:01:32 +0300
From: Oleg Makarenko <omakarenko@cyberplat.ru>
MIME-Version: 1.0
To: linux-kernel@vger.kernel.org
Subject: 2.2.18pre22: ppa_fail(3) from ppa_wait at line 319
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Sender: linux-kernel-owner@vger.kernel.org

With 2.2.18pre22 I get a lot of scsidisk I/O errors on my parallel port
zip.

All pervious versions of 2.2.18pre worked fine. The problem is 100%
reproducible and occurs
after a long period of inactivity (10 or more minutes)

compiled with #define PPA_DEBUG 1 I get:

ppa_fail(3) from ppa_wait at line 319

if you need more information please contact me directly as I am not on
the list

the following partial reversal patch seems to help (but I am not sure it
is correct):

--- ppa.c.2.2.18pre22   Mon Nov 20 16:54:36 2000
+++ ppa.c       Mon Nov 20 16:54:54 2000
@@ -690,7 +690,7 @@
            }
        }
        /* Now check to see if the drive is ready to comunicate */
-       r = ppa_wait(host_no); /* need ppa_wait() - PJC */
+      r = (r_str(ppb) & 0xf0);
        /* If not, drop back down to the scheduler and wait a timer tick
*/
        if (!(r & 0x80))
            return 0;


Oleg


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