There are now two methods that clear the port interrupt: ack_intr() method,
implemented only on M680x0 machines, that is called at the start of ide_intr(),
and clear_irq() method, that is called somewhat later in this function. In
order to stop this duplication, delegate the task of clearing the interrupt
to clear_irq() method, only leaving to ack_intr() the task of testing for the
port interrupt. This involves moving clear_irq() method call in ide_intr()
closer to the beginning of the function and removing ack_intr() method call
in ide_timer_expiry(), now becoming useless...
Signed-off-by: Sergei Shtylyov <sshtylyov@xxxxxxxxxxxxx>
---
The patch is atop of ide-2.6.git 'for-next' branch.
drivers/ide/gayle.c | 23 +++++++++++------------
drivers/ide/ide-io.c | 11 ++++-------
drivers/ide/macide.c | 18 ++++++++++++++----
3 files changed, 29 insertions(+), 23 deletions(-)
Index: ide-2.6/drivers/ide/gayle.c
===================================================================
--- ide-2.6.orig/drivers/ide/gayle.c
+++ ide-2.6/drivers/ide/gayle.c
@@ -66,7 +66,7 @@ MODULE_PARM_DESC(doubler, "enable suppor
* Check and acknowledge the interrupt status
*/
-static int gayle_ack_intr_a4000(ide_hwif_t *hwif)
+static int gayle_ack_intr(ide_hwif_t *hwif)
{
unsigned char ch;
@@ -76,16 +76,12 @@ static int gayle_ack_intr_a4000(ide_hwif
return 1;
}
-static int gayle_ack_intr_a1200(ide_hwif_t *hwif)
+static void gayle_a1200_clear_irq(ide_drive_t *drive)
{
- unsigned char ch;
+ ide_hwif_t *hwif = drive->hwif;
- ch = z_readb(hwif->io_ports.irq_addr);
- if (!(ch & GAYLE_IRQ_IDE))
- return 0;
(void)z_readb(hwif->io_ports.status_addr);
z_writeb(0x7c, hwif->io_ports.irq_addr);
- return 1;
}
static void __init gayle_setup_ports(struct ide_hw *hw, unsigned long base,
@@ -108,6 +104,10 @@ static void __init gayle_setup_ports(str
hw->ack_intr = ack_intr;
}
+static const struct ide_port_ops gayle_a1200_port_ops = {
+ .clear_irq = gayle_a1200_clear_irq,
+};
+
static const struct ide_port_info gayle_port_info = {
.host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_SERIALIZE |
IDE_HFLAG_NO_DMA,
@@ -123,9 +123,9 @@ static int __init gayle_init(void)
{
unsigned long phys_base, res_start, res_n;
unsigned long base, ctrlport, irqport;
- ide_ack_intr_t *ack_intr;
int a4000, i, rc;
struct ide_hw hw[GAYLE_NUM_HWIFS], *hws[GAYLE_NUM_HWIFS];
+ struct ide_port_info d = gayle_port_info;
if (!MACH_IS_AMIGA)
return -ENODEV;
@@ -148,11 +148,10 @@ found:
if (a4000) {
phys_base = GAYLE_BASE_4000;
irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_4000);
- ack_intr = gayle_ack_intr_a4000;
} else {
phys_base = GAYLE_BASE_1200;
irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_1200);
- ack_intr = gayle_ack_intr_a1200;
+ d.port_ops = gayle_a1200_port_ops;
}
res_start = ((unsigned long)phys_base) & ~(GAYLE_NEXT_PORT-1);
@@ -165,12 +164,12 @@ found:
base = (unsigned long)ZTWO_VADDR(phys_base + i * GAYLE_NEXT_PORT);
ctrlport = GAYLE_HAS_CONTROL_REG ? (base + GAYLE_CONTROL) : 0;
- gayle_setup_ports(&hw[i], base, ctrlport, irqport, ack_intr);
+ gayle_setup_ports(&hw[i], base, ctrlport, irqport, gayle_ack_intr);
hws[i] = &hw[i];
}
- rc = ide_host_add(&gayle_port_info, hws, i, NULL);
+ rc = ide_host_add(&d, hws, i, NULL);
if (rc)
release_mem_region(res_start, res_n);
Index: ide-2.6/drivers/ide/ide-io.c
===================================================================
--- ide-2.6.orig/drivers/ide/ide-io.c
+++ ide-2.6/drivers/ide/ide-io.c
@@ -667,8 +667,6 @@ void ide_timer_expiry (unsigned long dat
} else if (drive_is_ready(drive)) {
if (drive->waiting_for_dma)
hwif->dma_ops->dma_lost_irq(drive);
- if (hwif->ack_intr)
- hwif->ack_intr(hwif);
if (hwif->port_ops && hwif->port_ops->clear_irq)
hwif->port_ops->clear_irq(drive);
@@ -791,6 +789,10 @@ irqreturn_t ide_intr (int irq, void *dev
goto out;
handler = hwif->handler;
+ drive = hwif->cur_dev;
+
+ if (hwif->port_ops && hwif->port_ops->clear_irq)
+ hwif->port_ops->clear_irq(drive);
if (handler == NULL || hwif->polling) {
/*
@@ -821,8 +823,6 @@ irqreturn_t ide_intr (int irq, void *dev
goto out;
}
- drive = hwif->cur_dev;
-
if (!drive_is_ready(drive))
/*
* This happens regularly when we share a PCI IRQ with
@@ -839,9 +839,6 @@ irqreturn_t ide_intr (int irq, void *dev
del_timer(&hwif->timer);
spin_unlock(&hwif->lock);
- if (hwif->port_ops && hwif->port_ops->clear_irq)
- hwif->port_ops->clear_irq(drive);
-
if (drive->dev_flags & IDE_DFLAG_UNMASK)
local_irq_enable_in_hardirq();
Index: ide-2.6/drivers/ide/macide.c
===================================================================
--- ide-2.6.orig/drivers/ide/macide.c
+++ ide-2.6/drivers/ide/macide.c
@@ -55,13 +55,16 @@ volatile unsigned char *ide_ifr = (unsig
int macide_ack_intr(ide_hwif_t* hwif)
{
- if (*ide_ifr & 0x20) {
- *ide_ifr &= ~0x20;
+ if (*ide_ifr & 0x20)
return 1;
- }
return 0;
}
+static int macide_clear_irq(ide_drive_t *drive)
+{
+ *ide_ifr &= ~0x20;
+}
+
static void __init macide_setup_ports(struct ide_hw *hw, unsigned long base,
int irq, ide_ack_intr_t *ack_intr)
{
@@ -78,7 +81,12 @@ static void __init macide_setup_ports(st
hw->ack_intr = ack_intr;
}
+static const struct ide_port_ops macide_port_ops = {
+ .clear_irq = macide_clear_irq,
+};
+
static const struct ide_port_info macide_port_info = {
+ .port_ops = &macide_port_ops,
.host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA,
.irq_flags = IRQF_SHARED,
.chipset = ide_generic,
@@ -97,6 +105,7 @@ static int __init macide_init(void)
unsigned long base;
int irq;
struct ide_hw hw, *hws[] = { &hw };
+ struct ide_port_info d = macide_port_info;
if (!MACH_IS_MAC)
return -ENODEV;
@@ -115,6 +124,7 @@ static int __init macide_init(void)
case MAC_IDE_BABOON:
base = BABOON_BASE;
ack_intr = NULL;
+ d.port_ops = NULL;
irq = IRQ_BABOON_1;
break;
default:
@@ -126,7 +136,7 @@ static int __init macide_init(void)
macide_setup_ports(&hw, base, irq, ack_intr);
- return ide_host_add(&macide_port_info, hws, 1, NULL);
+ return ide_host_add(&d, hws, 1, NULL);
}
module_init(macide_init);
--
To unsubscribe from this list: send the line "unsubscribe linux-ide" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
