diff options
| author |   Guennadi Liakhovetski <g.liakhovetski@gmx.de> | 2012-11-23 20:55:06 +0100 |
|---|---|---|
| committer |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2012-11-23 20:55:06 +0100 |
| commit | a7227a0faa117d0bc532aea546ae5ac5f89e8ed7 (patch) | |
| tree | ad2843227bd9d9baac592463a86e0f3d485ad9d9 /drivers | |
| parent | Linux 3.7-rc6 (diff) | |
| download | linux-dev-a7227a0faa117d0bc532aea546ae5ac5f89e8ed7.tar.xz linux-dev-a7227a0faa117d0bc532aea546ae5ac5f89e8ed7.zip | |
PM / QoS: fix wrong error-checking condition
dev_pm_qos_add_request() can return 0, 1, or a negative error code,
therefore the correct error test is "if (error < 0)." Checking just for
non-zero return code leads to erroneous setting of the req->dev pointer
to NULL, which then leads to a repeated call to
dev_pm_qos_add_ancestor_request() in st1232_ts_irq_handler(). This in turn
leads to an Oops, when the I2C host adapter is unloaded and reloaded again
because of the inconsistent state of its QoS request list.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/base/power/qos.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/base/power/qos.c b/drivers/base/power/qos.c index 74a67e0019a2..fbbd4ed2edf2 100644 --- a/drivers/base/power/qos.c +++ b/drivers/base/power/qos.c @@ -451,7 +451,7 @@ int dev_pm_qos_add_ancestor_request(struct device *dev, if (ancestor) error = dev_pm_qos_add_request(ancestor, req, value); - if (error) + if (error < 0) req->dev = NULL; return error; |