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authorLevente Kurusa <levex@linux.com>2014-05-06 15:57:48 +0200
committerTejun Heo <tj@kernel.org>2014-05-07 09:17:03 -0400
commita6f9bf4d2f965b862b95213303d154e02957eed8 (patch)
tree8894fad6251e758a247f1560b886e0960b95bb40 /drivers/ata
parente783c51cce94521c10e599e991acdcfd9a996c4a (diff)
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>
Diffstat (limited to 'drivers/ata')
-rw-r--r--drivers/ata/libata-core.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 73c5d0410d47..886d4d3d63a3 100644
--- 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++)