Re: + via-pata-controller-xfer-fixes.patch added to -mm tree

[matthieu castet]

matthieu castet wrote:
> Hi Albert,
>
> Albert Lee wrote:
>
> > castet.matthieu@xxxxxxx wrote:
> >
> > > > Could you please test the current libata-upstream tree and
> > > > turn on ATA_DEBUG and ATA_VERBOSE_DEBUG in include/linux/libata.h.
> > >
> > > Is there a easy way to get libata-upstream tree ?
> > > Do I need to install git for that or there are some snapshots 
> > > somewhere ?
> >
> >
> > Hi Matthieu,
> >
> > Tejun has a patch against 2.6.17:
> > http://home-tj.org/files/libata-tj-stable/libata-tj-2.6.17-20060625-1.tar.bz2 
> I don't know if I did someting wrong, but it didn't apply cleanly.
> So I enable the trace on lastest -mm kernel and I disable the via quirk.
>
> But the printk in the interrupt handler takes some times and hides the 
> altstatus delay.
>
> I will try to send you a trace, where I move the printk at the end of 
> the interrupt handler.
After apllying the following patch to -mm, I got 
http://castet.matthieu.free.fr/tmp/ata_log

Matthieu

Index: linux-2.6.16/drivers/scsi/libata-core.c
===================================================================
--- linux-2.6.16.orig/drivers/scsi/libata-core.c	2006-07-02 10:32:33.000000000 +0200
+++ linux-2.6.16/drivers/scsi/libata-core.c	2006-07-02 10:38:03.000000000 +0200
@@ -4722,9 +4722,6 @@
 {
 	u8 status, host_stat = 0;
 
-	VPRINTK("ata%u: protocol %d task_state %d\n",
-		ap->id, qc->tf.protocol, ap->hsm_task_state);
-
 	/* Check whether we are expecting interrupt in this state */
 	switch (ap->hsm_task_state) {
 	case HSM_ST_FIRST:
@@ -4780,6 +4777,9 @@
 	ap->ops->irq_clear(ap);
 
 	ata_hsm_move(ap, qc, status, 0);
+	VPRINTK("ata%u: protocol %d task_state %d\n",
+		ap->id, qc->tf.protocol, ap->hsm_task_state);
+
 	return 1;	/* irq handled */
 
 idle_irq:
@@ -4792,6 +4792,9 @@
 		return 1;
 	}
 #endif
+	VPRINTK("ata%u: protocol %d task_state %d\n",
+		ap->id, qc->tf.protocol, ap->hsm_task_state);
+
 	return 0;	/* irq not handled */
 }
 
Index: linux-2.6.16/drivers/scsi/pata_via.c
===================================================================
--- linux-2.6.16.orig/drivers/scsi/pata_via.c	2006-07-01 19:38:41.000000000 +0200
+++ linux-2.6.16/drivers/scsi/pata_via.c	2006-07-01 19:38:54.000000000 +0200
@@ -324,7 +324,7 @@
 				continue;
 			if (!(qc->flags & ATA_QCFLAG_ACTIVE))
 				continue;
-			if (qc->tf.command == ATA_CMD_SET_FEATURES &&
+			if (0 && qc->tf.command == ATA_CMD_SET_FEATURES &&
 					qc->tf.feature == SETFEATURES_XFER) {
 				/*
 				 * With some ATAPI devices (CDR-6S48, ...), the
Index: linux-2.6.16/include/linux/libata.h
===================================================================
--- linux-2.6.16.orig/include/linux/libata.h	2006-07-01 19:37:51.000000000 +0200
+++ linux-2.6.16/include/linux/libata.h	2006-07-01 19:38:24.000000000 +0200
@@ -43,6 +43,8 @@
 #undef ATA_DEBUG		/* debugging output */
 #undef ATA_VERBOSE_DEBUG	/* yet more debugging output */
 #undef ATA_IRQ_TRAP		/* define to ack screaming irqs */
+#define ATA_DEBUG
+#define ATA_VERBOSE_DEBUG
 #undef ATA_NDEBUG		/* define to disable quick runtime checks */
 #define ATA_ENABLE_PATA		/* define to enable PATA support in some
 				 * low-level drivers */