* [PATCH] libata: clean up ZPODD when a port is detached
@ 2014-05-06 13:57 Levente Kurusa
2014-05-07 13:18 ` Tejun Heo
0 siblings, 1 reply; 2+ messages in thread
From: Levente Kurusa @ 2014-05-06 13:57 UTC (permalink / raw)
To: Tejun Heo
Cc: LKML, Linux ATA/IDE, Aaron Lu, Bartlomiej Zolnierkiewicz,
Joe Thomas, Levente Kurusa
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>
---
drivers/ata/libata-core.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 943cc8b..ea83828 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++)
--
1.8.3.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] libata: clean up ZPODD when a port is detached
2014-05-06 13:57 [PATCH] libata: clean up ZPODD when a port is detached Levente Kurusa
@ 2014-05-07 13:18 ` Tejun Heo
0 siblings, 0 replies; 2+ messages in thread
From: Tejun Heo @ 2014-05-07 13:18 UTC (permalink / raw)
To: Levente Kurusa
Cc: LKML, Linux ATA/IDE, Aaron Lu, Bartlomiej Zolnierkiewicz, Joe Thomas
On Tue, May 06, 2014 at 03:57:48PM +0200, Levente Kurusa wrote:
> 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>
Applied to libata/for-3.15-fixes.
Thanks.
--
tejun
^ permalink raw reply [flat|nested] 2+ messages in thread
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2014-05-06 13:57 [PATCH] libata: clean up ZPODD when a port is detached Levente Kurusa
2014-05-07 13:18 ` Tejun Heo
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