From 9f68a24853dd37d18f2cfa979cf4e131f5a10e8f Mon Sep 17 00:00:00 2001
From: Jeff Garzik <jgarzik@pobox.com>
Date: Tue, 15 Nov 2005 14:03:47 -0500
Subject: [PATCH] [libata ahci] command completion fixes, improved debug msgs
- Fix a regression in command completion, which prevented
the restart of the DMA engine after the device throws
an error.
- Pack more hardware info into the port-reset error message.
- Promote "welcome to our timeout" message from debug msg
to normal printk.
---
drivers/scsi/ahci.c | 25 +++++++++++++++----------
1 file changed, 15 insertions(+), 10 deletions(-)
diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c
index c710a7def7a7fd..894e7113e0b352 100644
--- a/drivers/scsi/ahci.c
+++ b/drivers/scsi/ahci.c
@@ -565,6 +565,17 @@ static void ahci_intr_error(struct ata_port *ap, u32 irq_stat)
u32 tmp;
int work;
+ printk(KERN_WARNING "ata%u: port reset, "
+ "p_is %x is %x pis %x cmd %x tf %x ss %x se %x\n",
+ ap->id,
+ irq_stat,
+ readl(mmio + HOST_IRQ_STAT),
+ readl(port_mmio + PORT_IRQ_STAT),
+ readl(port_mmio + PORT_CMD),
+ readl(port_mmio + PORT_TFDATA),
+ readl(port_mmio + PORT_SCR_STAT),
+ readl(port_mmio + PORT_SCR_ERR));
+
/* stop DMA */
tmp = readl(port_mmio + PORT_CMD);
tmp &= ~PORT_CMD_START;
@@ -602,13 +613,6 @@ static void ahci_intr_error(struct ata_port *ap, u32 irq_stat)
tmp |= PORT_CMD_START;
writel(tmp, port_mmio + PORT_CMD);
readl(port_mmio + PORT_CMD); /* flush */
-
- printk(KERN_WARNING "ata%u: error occurred, port reset (%s%s%s%s)\n",
- ap->id,
- irq_stat & PORT_IRQ_TF_ERR ? "taskf " : "",
- irq_stat & PORT_IRQ_HBUS_ERR ? "hbus " : "",
- irq_stat & PORT_IRQ_HBUS_DATA_ERR ? "hbus_data " : "",
- irq_stat & PORT_IRQ_IF_ERR ? "if " : "");
}
static void ahci_eng_timeout(struct ata_port *ap)
@@ -619,7 +623,7 @@ static void ahci_eng_timeout(struct ata_port *ap)
struct ata_queued_cmd *qc;
unsigned long flags;
- DPRINTK("ENTER\n");
+ printk(KERN_WARNING "ata%u: handling error/timeout\n", ap->id);
spin_lock_irqsave(&host_set->lock, flags);
@@ -672,8 +676,9 @@ static inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc)
else
err_mask = AC_ERR_HOST_BUS;
- if (err_mask != AC_ERR_DEV)
- ahci_intr_error(ap, status);
+ /* command processing has stopped due to error; restart */
+ ahci_intr_error(ap, status);
+
if (qc)
ata_qc_complete(qc, err_mask);
}
--
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