added reset code, to get even a busy wd93 back to its feets

1 files changed, 21 insertions, 0 deletions

diff --git a/drivers/scsi/wd33c93.c b/drivers/scsi/wd33c93.c
index 16fe5e022..b0f568855 100644
--- a/drivers/scsi/wd33c93.c
+++ b/drivers/scsi/wd33c93.c
@@ -1359,6 +1359,27 @@ uchar sr;
    hostdata = (struct WD33C93_hostdata *)instance->hostdata;
    regp = hostdata->regp;
 
+#ifdef CONFIG_SGI
+{
+int busycount = 0;
+extern void sgiwd93_reset(void);
+
+   /* wait 'til the chip gets some time for us */
+   while (READ_AUX_STAT() & ASR_BSY && busycount++ < 100)
+	udelay (10);
+   /*
+    * there are scsi devices out there, which manage to lock up
+    * the wd33c93 in a busy condition. In this state it won't
+    * accept the reset command. The only way to solve this is to
+    * give the chip a hardware reset (if possible). The code below
+    * does this for the SGI Indy, where this is possible
+    */
+   /* still busy ? */
+   if (READ_AUX_STAT() & ASR_BSY)
+	sgiwd93_reset(); /* yeah, give it the hard one */
+}
+#endif
+
    write_wd33c93(regp, WD_OWN_ID, OWNID_EAF | OWNID_RAF |
                  instance->this_id | hostdata->clock_freq);
    write_wd33c93(regp, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED);