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>

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 73c5d04..886d4d3 100644 (file)
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -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++)