| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.5 090/238] tpm: fix the cleanup of struct tpm_chip | Date | Sun, 10 Apr 2016 11:34:27 -0700 |
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4.5-stable review patch. If anyone has any objections, please let me know.
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From: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
commit 8e0ee3c9faed7ca68807ea45141775856c438ac0 upstream.
If the initialization fails before tpm_chip_register(), put_device() will be not called, which causes release callback not to be called. This patch fixes the issue by adding put_device() to devres list of the parent device.
Fixes: 313d21eeab ("tpm: device class for tpm") Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/char/tpm/tpm-chip.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/char/tpm/tpm-chip.c +++ b/drivers/char/tpm/tpm-chip.c @@ -136,6 +136,8 @@ struct tpm_chip *tpmm_chip_alloc(struct chip->cdev.owner = chip->pdev->driver->owner; chip->cdev.kobj.parent = &chip->dev.kobj; + devm_add_action(dev, (void (*)(void *)) put_device, &chip->dev); + return chip; } EXPORT_SYMBOL_GPL(tpmm_chip_alloc); @@ -171,7 +173,7 @@ static int tpm_add_char_device(struct tp static void tpm_del_char_device(struct tpm_chip *chip) { cdev_del(&chip->cdev); - device_unregister(&chip->dev); + device_del(&chip->dev); } static int tpm1_chip_register(struct tpm_chip *chip)
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