[PARPORT] lp patch

Andrea Arcangeli (arcangeli@mbox.queen.it)
Fri, 8 May 1998 21:08:45 +0200 (CEST)

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I noticed that this patch improves the lp parport sharing. While lp is
sharing the port with other pardevice it must work as polled.

This force lp to do that better, it' s against 2.1.100.

--- linux/drivers/char/lp.c 1998/05/08 18:50:36 1.32
+++ linux/drivers/char/lp.c 1998/05/08 18:56:14
@@ -178,8 +178,8 @@
                 status = r_str (minor);
                 if (LP_READY(minor, status))
                         break;
- if (!LP_POLLED(minor) || ++count == LP_CHAR(minor) ||
- signal_pending(current))
+ if ((!LP_POLLED(minor) && !LP_PREEMPTED(minor)) ||
+ ++count == LP_CHAR(minor) || signal_pending(current))
                         return 0;
         }
 

Andrea[s] Arcangeli

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