From: Pat LaVarre <p.lavarre@ieee.org>
To: Jeff Garzik <jgarzik@pobox.com>
Cc: linux-ide@vger.kernel.org
Subject: Re: [PATCH] atapi request sense work
Date: 21 May 2004 18:06:47 -0600 [thread overview]
Message-ID: <1085184407.3289.6.camel@patibmrh9> (raw)
In-Reply-To: <40AE9493.1040701@pobox.com>
> > kernel: ata_host_intr: BUS_NODATA (drv_stat 0x50)
> > kernel: irq 18: nobody cared!
>
> Can you print out the BMDMA status register (often called 'host_stat' in
> the code)?
Thanks for asking.
> I wonder if that indicates ATA_DMA_INTR for example.
I see ending host_stat = (x20 | ATA_DMA_INTR) same for ATA_PROT_ATAPI as
for ATA_PROT_ATAPI_DMA. (Next I'll go look to see how hard
ATA_PROT_ATAPI_DMA works to clear that.)
Specifically I see:
kernel: atapi_packet_task: busy wait
kernel: atapi_packet_task: send cdb
kernel: ata_host_intr: (host_stat 0x24)
kernel: ata_host_intr: BUS_NODATA (drv_stat 0x50)
kernel: irq 18: nobody cared!
when I apply the following patch (plus the usual #define's) and then
retry the no data case.
Pat LaVarre
diff -Nurp linux-2.6.6-bk8/drivers/scsi/libata-core.c linux-2.6.6-bk8-pel/drivers/scsi/libata-core.c
--- linux-2.6.6-bk8/drivers/scsi/libata-core.c 2004-05-21 09:44:22.000000000 -0600
+++ linux-2.6.6-bk8-pel/drivers/scsi/libata-core.c 2004-05-21 17:53:03.000000000 -0600
@@ -2303,6 +2303,9 @@ void ata_qc_complete(struct ata_queued_c
ata_sg_clean(qc);
if (cmd) {
+#if 1 /* pretend good */
+ cmd->result = SAM_STAT_GOOD;
+#else /* FIXME: admit lost write data, stale read data, etc. */
if (unlikely(drv_stat & (ATA_ERR | ATA_BUSY | ATA_DRQ))) {
if (is_atapi_taskfile(&qc->tf))
cmd->result = SAM_STAT_CHECK_CONDITION;
@@ -2311,6 +2314,7 @@ void ata_qc_complete(struct ata_queued_c
} else {
cmd->result = SAM_STAT_GOOD;
}
+#endif
qc->scsidone(cmd);
}
@@ -2616,16 +2620,18 @@ inline unsigned int ata_host_intr (struc
u8 status, host_stat;
unsigned int handled = 0;
- switch (qc->tf.protocol) {
-
- /* BMDMA completion */
- case ATA_PROT_DMA:
- case ATA_PROT_ATAPI_DMA:
if (ap->flags & ATA_FLAG_MMIO) {
void *mmio = (void *) ap->ioaddr.bmdma_addr;
host_stat = readb(mmio + ATA_DMA_STATUS);
} else
host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
+ VPRINTK("(host_stat 0x%X)\n", host_stat);
+
+ switch (qc->tf.protocol) {
+
+ /* BMDMA completion */
+ case ATA_PROT_DMA:
+ case ATA_PROT_ATAPI_DMA:
VPRINTK("BUS_DMA (host_stat 0x%X)\n", host_stat);
if (!(host_stat & ATA_DMA_INTR)) {
diff -Nurp linux-2.6.6-bk8/drivers/scsi/libata-scsi.c linux-2.6.6-bk8-pel/drivers/scsi/libata-scsi.c
next prev parent reply other threads:[~2004-05-22 0:06 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-16 14:19 [PATCH] libata DMADIR support Pat LaVarre
2004-05-16 23:16 ` Jeff Garzik
2004-05-17 18:48 ` Pat LaVarre
2004-05-17 19:08 ` Jeff Garzik
2004-05-17 21:06 ` Pat LaVarre
2004-05-17 21:40 ` Jeff Garzik
2004-05-17 21:20 ` Pat LaVarre
2004-05-17 21:32 ` Jeff Garzik
2004-05-17 21:34 ` Jeff Garzik
2004-05-17 22:05 ` Pat LaVarre
2004-05-17 22:36 ` Jeff Garzik
2004-05-17 23:04 ` Pat LaVarre
2004-05-18 22:40 ` Pat LaVarre
2004-05-18 23:07 ` Pat LaVarre
2004-05-18 23:50 ` Jeff Garzik
2004-05-19 22:47 ` Pat LaVarre
2004-05-18 23:48 ` [PATCH] atapi request sense work Jeff Garzik
2004-05-19 20:35 ` Pat LaVarre
2004-05-19 22:19 ` Jeff Garzik
2004-05-19 22:24 ` Pat LaVarre
2004-05-19 22:27 ` Pat LaVarre
2004-05-19 22:54 ` Pat LaVarre
2004-05-21 1:58 ` Pat LaVarre
[not found] ` <6 E36A 11B-AACB-11D8-8B8A-003065635034@ieee.org>
2004-05-21 2:06 ` Pat LaVarre
2004-05-21 3:05 ` Pat LaVarre
2004-05-21 4:04 ` Jeff Garzik
[not found] ` <1 085153750.6103.33.camel@patibmrh9>
2004-05-21 15:35 ` Pat LaVarre
2004-05-21 15:46 ` Bartlomiej Zolnierkiewicz
2004-05-21 17:59 ` Pat LaVarre
2004-05-21 20:07 ` Pat LaVarre
2004-05-21 21:51 ` Jeff Garzik
2004-05-21 23:12 ` Pat LaVarre
2004-05-21 23:24 ` Pat LaVarre
2004-05-21 23:55 ` Jeff Garzik
2004-05-21 23:57 ` Pat LaVarre
2004-05-21 23:39 ` Pat LaVarre
2004-05-21 23:45 ` Jeff Garzik
2004-05-22 0:06 ` Pat LaVarre [this message]
2004-05-22 0:12 ` Pat LaVarre
2004-05-22 0:33 ` Pat LaVarre
2004-05-22 1:11 ` Pat LaVarre
2004-05-26 21:49 ` Pat LaVarre
2004-05-27 23:12 ` Pat LaVarre
2004-05-27 23:32 ` Jeff Garzik
2004-05-27 23:38 ` Pat LaVarre
2004-05-27 23:41 ` Jeff Garzik
2004-05-28 0:13 ` Pat LaVarre
2004-05-28 1:28 ` Pat LaVarre
2004-05-24 15:27 ` Pat LaVarre
2004-05-21 21:59 ` Pat LaVarre
2004-05-21 18:23 ` Danny Cox
2004-05-21 18:39 ` Bartlomiej Zolnierkiewicz
2004-05-21 18:55 ` [PATCH] kmalloc old_hwif Danny Cox
2004-05-21 19:00 ` [PATCH] atapi request sense work Danny Cox
2004-05-21 19:08 ` Bartlomiej Zolnierkiewicz
-- strict thread matches above, loose matches on Subject: below --
2004-05-21 18:45 dwm
2004-05-21 20:44 ` Pat LaVarre
2004-05-30 12:44 Pat LaVarre
2004-05-30 15:15 ` Pat LaVarre
2004-05-31 16:09 ` Pat LaVarre
2004-06-02 0:01 ` Pat LaVarre
2004-06-02 20:52 ` Pat LaVarre
2004-06-02 22:36 ` Pat LaVarre
2004-06-02 22:55 ` Jeff Garzik
2004-06-02 23:53 ` Pat LaVarre
2004-06-03 0:30 ` Pat LaVarre
2004-06-03 0:52 ` Jeff Garzik
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