From: Levente Kurusa Date: Tue, 6 May 2014 13:57:48 +0000 (+0200) Subject: libata: clean up ZPODD when a port is detached X-Git-Url: http://git.mmlx.us/?a=commitdiff_plain;h=a40aac07285bdf77ed67af1423676ff5548ef51b;p=linux-edison.git libata: clean up ZPODD when a port is detached 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 Signed-off-by: Levente Kurusa Signed-off-by: Tejun Heo Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 9cf616b5210..bf00fbcde8a 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -6300,6 +6300,8 @@ 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; @@ -6319,6 +6321,13 @@ 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++)