diff options
| author | Yinghai Lu <yinghai@kernel.org> | 2012-03-03 13:29:20 -0800 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2012-03-30 03:38:40 -0400 |
| commit | 89e96ada572fb216e582dbe3f64e1a6939a37f74 (patch) | |
| tree | e59a7c8e6ba83992114f7232f831b34e699f24cc /drivers/pnp/pnpacpi | |
| parent | ac909ec308ce8d5177963c780564824d12bc3fa2 (diff) | |
| download | lwn-89e96ada572fb216e582dbe3f64e1a6939a37f74.tar.gz lwn-89e96ada572fb216e582dbe3f64e1a6939a37f74.zip | |
PNPACPI: Fix device ref leaking in acpi_pnp_match
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 pu_device calling before returning.
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/pnp/pnpacpi')
| -rw-r--r-- | 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 b00c17612a89..d21e8f59c84e 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)); } |