AcoSail/kernel_optimize_test
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tpm: check the chip reference before using it

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If a driver calls tpm_dev_vendor_release for a device already released
then the driver will oops.

Signed-off-by: Andi Shyti <andi.shyti@gmail.com>
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Signed-off-by: Rajiv Andrade <srajiv@linux.vnet.ibm.com>
This commit is contained in:
Andi Shyti 2012-05-28 18:42:45 +02:00 committed by Rajiv Andrade
parent dad79cb892
commit 3072928ff2
1 changed files with 6 additions and 0 deletions
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6
drivers/char/tpm/tpm.c
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@ -1330,6 +1330,9 @@ EXPORT_SYMBOL_GPL(tpm_pm_resume);
void tpm_dev_vendor_release(struct tpm_chip *chip)
{
if (!chip)
return;
if (chip->vendor.release)
chip->vendor.release(chip->dev);
@ -1347,6 +1350,9 @@ void tpm_dev_release(struct device *dev)
{
struct tpm_chip *chip = dev_get_drvdata(dev);
if (!chip)
return;
tpm_dev_vendor_release(chip);
chip->release(dev);