* [PATCH] tpm: check the chip reference before using it
@ 2012-05-28 16:23 Andi Shyti
2012-05-28 16:37 ` Andi Shyti
0 siblings, 1 reply; 2+ messages in thread
From: Andi Shyti @ 2012-05-28 16:23 UTC (permalink / raw)
To: debora, srajiv, m.selhorst
Cc: tpmdd-devel, linux-kernel, peterhuewe, andi.shyti, oatilla
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>
---
drivers/char/tpm/tpm.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c
index ad7c732..66e4c12 100644
--- a/drivers/char/tpm/tpm.c
+++ b/drivers/char/tpm/tpm.c
@@ -1322,6 +1322,9 @@ 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);
@@ -1337,6 +1340,9 @@ EXPORT_SYMBOL_GPL(tpm_dev_vendor_release);
*/
void tpm_dev_release(struct device *dev)
{
+ if (!chip)
+ return;
+
struct tpm_chip *chip = dev_get_drvdata(dev);
tpm_dev_vendor_release(chip);
--
1.7.10
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] tpm: check the chip reference before using it
2012-05-28 16:23 [PATCH] tpm: check the chip reference before using it Andi Shyti
@ 2012-05-28 16:37 ` Andi Shyti
0 siblings, 0 replies; 2+ messages in thread
From: Andi Shyti @ 2012-05-28 16:37 UTC (permalink / raw)
To: debora, srajiv; +Cc: tpmdd-devel, linux-kernel, peterhuewe, oatilla
Hi,
On Mon, May 28, 2012 at 06:23:12PM +0200, Andi Shyti wrote:
> void tpm_dev_release(struct device *dev)
> {
> + if (!chip)
> + return;
> +
> struct tpm_chip *chip = dev_get_drvdata(dev);
sorry wrong patch file... this is not going to work...
I'll resend it
Andi
^ permalink raw reply [flat|nested] 2+ messages in thread
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