[PATCH 3.10 091/103] libata: clean up ZPODD when a port is detached

Greg Kroah-Hartman
2014-06-04T23:26:45Z

From: Levente Kurusa <levex@linux.com>

commit a6f9bf4d2f965b862b95213303d154e02957eed8 upstream.

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.

Reviewed-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Levente Kurusa <levex@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/ata/libata-core.c | 9 +++++++++
1 file changed, 9 insertions(+)

--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -6300,6 +6300,8 @@ int ata_host_activate(struct ata_host *h
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;
@@ -6319,6 +6321,13 @@ static void ata_port_detach(struct ata_p
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++)