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libata: clean up ZPODD when a port is detached 

When a ZPODD device is unbound via sysfs, the ACPI notify handler
is not removed. This causes panics as observed in Bug #74601. The
panic only happens when the wake happens from outside the kernel
(i.e. inserting a media or pressing a button). Add a loop to
ata_port_detach which loops through the port's devices and checks
if zpodd is enabled, if so call zpodd_exit.

Cc: stable@vger.kernel.org
Reviewed-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Levente Kurusa <levex@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Levente Kurusa 2014-05-06 15:57:48 +02:00 committed by Tejun Heo
parent e783c51cce
commit a6f9bf4d2f
1 changed files with 9 additions and 0 deletions
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9
drivers/ata/libata-core.c
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@ -6314,6 +6314,8 @@ int ata_host_activate(struct ata_host *host, int irq,
static void ata_port_detach(struct ata_port *ap)
{
unsigned long flags;
struct ata_link *link;
struct ata_device *dev;
if (!ap->ops->error_handler)
goto skip_eh;
@ -6333,6 +6335,13 @@ static void ata_port_detach(struct ata_port *ap)
cancel_delayed_work_sync(&ap->hotplug_task);
skip_eh:
/* clean up zpodd on port removal */
ata_for_each_link(link, ap, HOST_FIRST) {
ata_for_each_dev(dev, link, ALL) {
if (zpodd_dev_enabled(dev))
zpodd_exit(dev);
}
}
if (ap->pmp_link) {
int i;
for (i = 0; i < SATA_PMP_MAX_PORTS; i++)