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libata-acpi: don't call sleeping function from invalid context 

The problem is introduced by commit
664d080c41.

acpi_evaluate_integer is a sleeping function,
and it should not be called with spin_lock_irqsave.
https://bugzilla.redhat.com/show_bug.cgi?id=451399

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
hifive-unleashed-5.1
Zhang Rui 2008-07-11 09:42:03 -04:00 committed by Jeff Garzik
parent edb804713f
commit 3c1e389634
1 changed files with 4 additions and 1 deletions
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5
drivers/ata/libata-acpi.c
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@ -197,6 +197,10 @@ static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device *dev,
/* This device does not support hotplug */
return;
if (event == ACPI_NOTIFY_BUS_CHECK ||
event == ACPI_NOTIFY_DEVICE_CHECK)
status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
spin_lock_irqsave(ap->lock, flags);
switch (event) {
@ -204,7 +208,6 @@ static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device *dev,
case ACPI_NOTIFY_DEVICE_CHECK:
ata_ehi_push_desc(ehi, "ACPI event");
status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
if (ACPI_FAILURE(status)) {
ata_port_printk(ap, KERN_ERR,
"acpi: failed to determine bay status (0x%x)\n",