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authorJason Gunthorpe <jgunthorpe@obsidianresearch.com>2015-06-30 13:15:31 -0600
committerPeter Huewe <peterhuewe@gmx.de>2015-07-13 23:33:57 +0200
commitba0ef85479c46a2ab354c2220bdb6152f7f4baf3 (patch)
treebcd66fd63ce3ba231baa834380cc55df4c00d631 /drivers/char
parentb3bddffd35a0b77eee89760eb94cafa18dc431f5 (diff)
downloadlinux-ba0ef85479c46a2ab354c2220bdb6152f7f4baf3.tar.bz2
tpm: Fix initialization of the cdev
When a cdev is contained in a dynamic structure the cdev parent kobj should be set to the kobj that controls the lifetime of the enclosing structure. In TPM's case this is the embedded struct device. Also, cdev_init 0's the whole structure, so all sets must be after, not before. This fixes module ref counting and cdev. Cc: <stable@vger.kernel.org> Fixes: 313d21eeab92 ("tpm: device class for tpm") Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Diffstat (limited to 'drivers/char')
-rw-r--r--drivers/char/tpm/tpm-chip.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c
index 283f00a7f036..1082d4bb016a 100644
--- a/drivers/char/tpm/tpm-chip.c
+++ b/drivers/char/tpm/tpm-chip.c
@@ -129,8 +129,9 @@ struct tpm_chip *tpmm_chip_alloc(struct device *dev,
device_initialize(&chip->dev);
- chip->cdev.owner = chip->pdev->driver->owner;
cdev_init(&chip->cdev, &tpm_fops);
+ chip->cdev.owner = chip->pdev->driver->owner;
+ chip->cdev.kobj.parent = &chip->dev.kobj;
return chip;
}