During testing pci root bus removal, found some root bus bridge is not freed.
If booting with pnpacpi=off, those hostbridge could be freed without problem.
It turns out that some devices reference are not released during acpi_pnp_match.
That match should not hold one device ref during every calling.
Add put_device calling before returning.
Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
Cc: stable@xxxxxxxxxx
Cc: Len Brown <lenb@xxxxxxxxxx>
Cc: Adam Belay <abelay@xxxxxxx>
Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Cc: linux-acpi@xxxxxxxxxxxxxxx
---
drivers/pnp/pnpacpi/core.c | 7 ++++++-
1 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/drivers/pnp/pnpacpi/core.c b/drivers/pnp/pnpacpi/core.c
index b00c176..d21e8f5 100644
--- a/drivers/pnp/pnpacpi/core.c
+++ b/drivers/pnp/pnpacpi/core.c
@@ -321,9 +321,14 @@ static int __init acpi_pnp_match(struct device *dev, void *_pnp)
{
struct acpi_device *acpi = to_acpi_device(dev);
struct pnp_dev *pnp = _pnp;
+ struct device *physical_device;
+
+ physical_device = acpi_get_physical_device(acpi->handle);
+ if (physical_device)
+ put_device(physical_device);
/* true means it matched */
- return !acpi_get_physical_device(acpi->handle)
+ return !physical_device
&& compare_pnp_id(pnp->id, acpi_device_hid(acpi));
}
--
1.7.7
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