diff options
| author | Alexander Shishkin <alexander.shishkin@linux.intel.com> | 2019-11-20 15:08:04 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-17 20:35:01 +0100 |
| commit | aa5d849be16511186cdb1d7b63fcbcc38ac51f2f (patch) | |
| tree | 57cd9f3fd59b368153ff47aca960594b88e6d11b /drivers/hwtracing | |
| parent | b56d00ace1fc0c0382a730c056e35c01a12f8ff4 (diff) | |
intel_th: Fix a double put_device() in error path
commit 512592779a337feb5905d8fcf9498dbf33672d4a upstream.
Commit a753bfcfdb1f ("intel_th: Make the switch allocate its subdevices")
factored out intel_th_subdevice_alloc() from intel_th_populate(), but got
the error path wrong, resulting in two instances of a double put_device()
on a freshly initialized, but not 'added' device.
Fix this by only doing one put_device() in the error path.
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Fixes: a753bfcfdb1f ("intel_th: Make the switch allocate its subdevices")
Reported-by: Wen Yang <wenyang@linux.alibaba.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: stable@vger.kernel.org # v4.14+
Link: https://lore.kernel.org/r/20191120130806.44028-2-alexander.shishkin@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hwtracing')
| -rw-r--r-- | drivers/hwtracing/intel_th/core.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/drivers/hwtracing/intel_th/core.c b/drivers/hwtracing/intel_th/core.c index fc6b7f8b62fb..a8e750291643 100644 --- a/drivers/hwtracing/intel_th/core.c +++ b/drivers/hwtracing/intel_th/core.c @@ -629,10 +629,8 @@ intel_th_subdevice_alloc(struct intel_th *th, } err = intel_th_device_add_resources(thdev, res, subdev->nres); - if (err) { - put_device(&thdev->dev); + if (err) goto fail_put_device; - } if (subdev->type == INTEL_TH_OUTPUT) { thdev->dev.devt = MKDEV(th->major, th->num_thdevs); @@ -646,10 +644,8 @@ intel_th_subdevice_alloc(struct intel_th *th, } err = device_add(&thdev->dev); - if (err) { - put_device(&thdev->dev); + if (err) goto fail_free_res; - } /* need switch driver to be loaded to enumerate the rest */ if (subdev->type == INTEL_TH_SWITCH && !req) { |