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Subject[PATCH] 2.5.15 IDE 62
Mon May 13 12:38:11 CEST 2002 ide-clean-62

- Add missing locking around ide_do_request in do_ide_request().

- Check all other places where locks get used for matching pairs in ide.c.

- Streamline device detection reporting to always use ->slot_name.
diff -urN linux-2.5.15/drivers/ide/ide.c linux/drivers/ide/ide.c
--- linux-2.5.15/drivers/ide/ide.c 2002-05-13 15:13:11.000000000 +0200
+++ linux/drivers/ide/ide.c 2002-05-13 14:27:39.000000000 +0200
@@ -323,6 +323,7 @@
}

spin_unlock_irqrestore(&ide_lock, flags);
+
return ret;
}

@@ -341,6 +342,7 @@
ide_hwgroup_t *hwgroup = ch->hwgroup;

spin_lock_irqsave(&ide_lock, flags);
+
if (hwgroup->handler != NULL) {
printk("%s: ide_set_handler: handler not null; old=%p, new=%p, from %p\n",
drive->name, hwgroup->handler, handler, __builtin_return_address(0));
@@ -349,6 +351,7 @@
ch->expiry = expiry;
ch->timer.expires = jiffies + timeout;
add_timer(&ch->timer);
+
spin_unlock_irqrestore(&ide_lock, flags);
}

@@ -1071,8 +1074,10 @@
unsigned long flags;

spin_lock_irqsave(&ide_lock, flags);
+
hwgroup->handler = NULL;
del_timer(&ch->timer);
+
spin_unlock_irqrestore(&ide_lock, flags);

return start_request(drive, drive->rq);
@@ -1275,10 +1280,12 @@
disable_irq_nosync(drive->channel->irq);

spin_unlock(&ide_lock);
+
ide__sti(); /* allow other IRQs while we start this request */
startstop = start_request(drive, rq);

spin_lock_irq(&ide_lock);
+
if (masked_irq && drive->channel->irq != masked_irq)
enable_irq(drive->channel->irq);

@@ -1332,7 +1339,7 @@
static void ide_do_request(struct ata_channel *channel, int masked_irq)
{
ide_get_lock(&irq_lock, ata_irq_request, hwgroup);/* for atari only: POSSIBLY BROKEN HERE(?) */
- __cli(); /* necessary paranoia: ensure IRQs are masked on local CPU */
+// __cli(); /* necessary paranoia: ensure IRQs are masked on local CPU */

while (!test_and_set_bit(IDE_BUSY, &channel->active)) {
struct ata_channel *ch;
@@ -1362,11 +1369,16 @@

queue_commands(drive, masked_irq);
}
+
}

void do_ide_request(request_queue_t *q)
{
+ unsigned long flags;
+
+ spin_lock_irqsave(&ide_lock, flags);
ide_do_request(q->queuedata, 0);
+ spin_unlock_irqrestore(&ide_lock, flags);
}

/*
@@ -1455,7 +1467,9 @@
/* reengage timer */
ch->timer.expires = jiffies + wait;
add_timer(&ch->timer);
+
spin_unlock_irqrestore(&ide_lock, flags);
+
return;
}
}
@@ -1465,7 +1479,9 @@
* the handler() function, which means we need to globally
* mask the specific IRQ:
*/
+
spin_unlock(&ide_lock);
+
ch = drive->channel;
#if DISABLE_IRQ_NOSYNC
disable_irq_nosync(ch->irq);
@@ -1490,7 +1506,9 @@
}
set_recovery_timer(ch);
enable_irq(ch->irq);
+
spin_lock_irq(&ide_lock);
+
if (startstop == ide_stopped)
clear_bit(IDE_BUSY, &ch->active);
}
@@ -1621,6 +1639,7 @@
printk(KERN_ERR "%s: %s: hwgroup was not busy!?\n", drive->name, __FUNCTION__);
hwgroup->handler = NULL;
del_timer(&ch->timer);
+
spin_unlock(&ide_lock);

if (ch->unmask)
@@ -1725,7 +1744,9 @@
rq->rq_dev = mk_kdev(major,(drive->select.b.unit)<<PARTN_BITS);
if (action == ide_wait)
rq->waiting = &wait;
+
spin_lock_irqsave(&ide_lock, flags);
+
if (blk_queue_empty(&drive->queue) || action == ide_preempt) {
if (action == ide_preempt)
drive->rq = NULL;
@@ -1737,7 +1758,9 @@
}
q->elevator.elevator_add_req_fn(q, rq, queue_head);
ide_do_request(drive->channel, 0);
+
spin_unlock_irqrestore(&ide_lock, flags);
+
if (action == ide_wait) {
wait_for_completion(&wait); /* wait for it to be serviced */
return rq->errors ? -EIO : 0; /* return -EIO if errors */
@@ -1767,12 +1790,15 @@
spin_lock_irqsave(&ide_lock, flags);

if (drive->busy || (drive->usage > 1)) {
+
spin_unlock_irqrestore(&ide_lock, flags);
+
return -EBUSY;
}

drive->busy = 1;
MOD_INC_USE_COUNT;
+
spin_unlock_irqrestore(&ide_lock, flags);

res = wipe_partitions(i_rdev);
@@ -1789,6 +1815,7 @@
drive->busy = 0;
wake_up(&drive->wqueue);
MOD_DEC_USE_COUNT;
+
return res;
}

@@ -1950,6 +1977,7 @@
* All clear? Then blow away the buffer cache
*/
spin_unlock_irqrestore(&ide_lock, flags);
+
for (unit = 0; unit < MAX_DRIVES; ++unit) {
struct ata_device * drive = &ch->drives[unit];

@@ -1964,6 +1992,7 @@
}
}
}
+
spin_lock_irqsave(&ide_lock, flags);

/*
@@ -2221,11 +2250,14 @@
spin_lock_irq(&ide_lock);

while (test_bit(IDE_BUSY, &drive->channel->active)) {
+
spin_unlock_irq(&ide_lock);
+
if (time_after(jiffies, timeout)) {
printk("%s: channel busy\n", drive->name);
return -EBUSY;
}
+
spin_lock_irq(&ide_lock);
}

@@ -3455,7 +3487,7 @@
#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
# if defined(__mc68000__) || defined(CONFIG_APUS)
if (ide_hwifs[0].io_ports[IDE_DATA_OFFSET]) {
- ide_get_lock(&irq_lock, NULL, NULL);/* for atari only */
+ // ide_get_lock(&irq_lock, NULL, NULL);/* for atari only */
disable_irq(ide_hwifs[0].irq); /* disable_irq_nosync ?? */
// disable_irq_nosync(ide_hwifs[0].irq);
}
diff -urN linux-2.5.15/drivers/ide/ide-pci.c linux/drivers/ide/ide-pci.c
--- linux-2.5.15/drivers/ide/ide-pci.c 2002-05-13 15:13:11.000000000 +0200
+++ linux/drivers/ide/ide-pci.c 2002-05-13 15:01:41.000000000 +0200
@@ -553,15 +553,14 @@
}
}
}
-
- printk("ATA: %s: controller on PCI bus %02x dev %02x\n",
- dev->name, dev->bus->number, dev->devfn);
+ printk(KERN_INFO "ATA: %s: controller on PCI slot %s dev %02x\n",
+ dev->name, dev->slot_name, dev->devfn);
setup_pci_device(dev, d);
if (!dev2)
return;
d2 = d;
- printk("ATA: %s: controller on PCI bus %02x dev %02x\n",
- dev2->name, dev2->bus->number, dev2->devfn);
+ printk(KERN_INFO "ATA: %s: controller on PCI slot %s dev %02x\n",
+ dev2->name, dev2->slot_name, dev2->devfn);
setup_pci_device(dev2, d2);
}

@@ -584,8 +583,8 @@
}
}

- printk("%s: IDE controller on PCI bus %02x dev %02x\n",
- dev->name, dev->bus->number, dev->devfn);
+ printk(KERN_INFO "ATA: %s: controller on PCI slot %s dev %02x\n",
+ dev->name, dev->slot_name, dev->devfn);
setup_pci_device(dev, d);
if (!dev2) {
return;
@@ -601,8 +600,8 @@
}
}
d2 = d;
- printk("%s: IDE controller on PCI bus %02x dev %02x\n",
- dev2->name, dev2->bus->number, dev2->devfn);
+ printk(KERN_INFO "ATA: %s: controller on PCI slot %s dev %02x\n",
+ dev2->name, dev2->slot_name, dev2->devfn);
setup_pci_device(dev2, d2);

}
@@ -623,7 +622,7 @@
switch(class_rev) {
case 5:
case 4:
- case 3: printk("%s: IDE controller on PCI slot %s\n", dev->name, dev->slot_name);
+ case 3: printk(KERN_INFO "ATA: %s: controller on PCI slot %s\n", dev->name, dev->slot_name);
setup_pci_device(dev, d);
return;
default: break;
@@ -639,17 +638,17 @@
pci_read_config_byte(dev2, PCI_INTERRUPT_PIN, &pin2);
if ((pin1 != pin2) && (dev->irq == dev2->irq)) {
d->bootable = ON_BOARD;
- printk("%s: onboard version of chipset, pin1=%d pin2=%d\n", dev->name, pin1, pin2);
+ printk(KERN_INFO "ATAL: %s: onboard version of chipset, pin1=%d pin2=%d\n", dev->name, pin1, pin2);
}
break;
}
}
- printk("%s: IDE controller on PCI slot %s\n", dev->name, dev->slot_name);
+ printk(KERN_INFO "ATA: %s: controller on PCI slot %s\n", dev->name, dev->slot_name);
setup_pci_device(dev, d);
if (!dev2)
return;
d2 = d;
- printk("%s: IDE controller on PCI slot %s\n", dev2->name, dev2->slot_name);
+ printk(KERN_INFO "ATA: %s: controller on PCI slot %s\n", dev2->name, dev2->slot_name);
setup_pci_device(dev2, d2);
}

@@ -679,6 +678,10 @@
}

if (!d) {
+ /* Only check the device calls, if it wasn't listed, since
+ * there are in esp. some pdc202xx chips which "work around"
+ * beeing grabbed by generic drivers.
+ */
if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE) {
printk(KERN_INFO "ATA: unknown interface: %s, on PCI slot %s\n",
dev->name, dev->slot_name);
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