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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2009-06-23 03:43:00 -0700
committerDavid S. Miller <davem@davemloft.net>2009-06-24 00:32:30 -0700
commitffc36c7610731115c77700dcc53901920361c235 (patch)
treec300ea91a72c166c6e9d10a6526b29514d3956ce /drivers/ide/ide-probe.c
parente01698aed04811b9a9c4f8d54b73cb182757063d (diff)
downloadop-kernel-dev-ffc36c7610731115c77700dcc53901920361c235.zip
op-kernel-dev-ffc36c7610731115c77700dcc53901920361c235.tar.gz
ide: fix handling of unexpected IRQs vs request_irq()
Add ide_host_enable_irqs() helper and use it in ide_host_register() before registering ports. Then remove no longer needed IRQ unmasking from in init_irq(). This should fix the problem with "screaming" shared IRQ on the first port (after request_irq() call while we have the unexpected IRQ pending on the second port) which was uncovered by my rework of the serialized interfaces support. Reported-by: Frans Pop <elendil@planet.nl> Tested-by: Frans Pop <elendil@planet.nl> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/ide/ide-probe.c')
-rw-r--r--drivers/ide/ide-probe.c23
1 files changed, 20 insertions, 3 deletions
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index 51af4ee..1bb106f 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -818,6 +818,24 @@ static int ide_port_setup_devices(ide_hwif_t *hwif)
return j;
}
+static void ide_host_enable_irqs(struct ide_host *host)
+{
+ ide_hwif_t *hwif;
+ int i;
+
+ ide_host_for_each_port(i, hwif, host) {
+ if (hwif == NULL)
+ continue;
+
+ /* clear any pending IRQs */
+ hwif->tp_ops->read_status(hwif);
+
+ /* unmask IRQs */
+ if (hwif->io_ports.ctl_addr)
+ hwif->tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
+ }
+}
+
/*
* This routine sets up the IRQ for an IDE interface.
*/
@@ -831,9 +849,6 @@ static int init_irq (ide_hwif_t *hwif)
if (irq_handler == NULL)
irq_handler = ide_intr;
- if (io_ports->ctl_addr)
- hwif->tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
-
if (request_irq(hwif->irq, irq_handler, sa, hwif->name, hwif))
goto out_up;
@@ -1404,6 +1419,8 @@ int ide_host_register(struct ide_host *host, const struct ide_port_info *d,
ide_port_tune_devices(hwif);
}
+ ide_host_enable_irqs(host);
+
ide_host_for_each_port(i, hwif, host) {
if (hwif == NULL)
continue;
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