diff options
| author | Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> | 2016-04-11 14:20:57 +0300 |
|---|---|---|
| committer | Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> | 2016-06-25 17:26:35 +0300 |
| commit | dcbeab194645486dc482b49b44ef5b8634153034 (patch) | |
| tree | 120fa47c8681277704daaf071584922949df1cad /drivers/char | |
| parent | d30b8e4f68ef182f8dd84c76af9f148ca5842ea3 (diff) | |
| download | linux-dcbeab194645486dc482b49b44ef5b8634153034.tar.xz | |
tpm: fix crash in tpm_tis deinitialization
rmmod crashes the driver because tpm_chip_unregister() already sets ops
to NULL. This commit fixes the issue by moving tpm2_shutdown() to
tpm_chip_unregister(). This commit is also cleanup because it removes
duplicate code from tpm_crb and tpm_tis to the core.
Fixes: 4d3eac5e156a ("tpm: Provide strong locking for device removal")
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/tpm/tpm-chip.c | 1 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm2-cmd.c | 1 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm_crb.c | 3 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm_tis.c | 3 |
4 files changed, 1 insertions, 7 deletions
diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c index f62c8518cd68..5bc530ccbb86 100644 --- a/drivers/char/tpm/tpm-chip.c +++ b/drivers/char/tpm/tpm-chip.c @@ -269,6 +269,7 @@ static void tpm_del_char_device(struct tpm_chip *chip) /* Make the driver uncallable. */ down_write(&chip->ops_sem); + tpm2_shutdown(chip, TPM2_SU_CLEAR); chip->ops = NULL; up_write(&chip->ops_sem); } diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c index 5fc0e7c64daa..e42266589ce6 100644 --- a/drivers/char/tpm/tpm2-cmd.c +++ b/drivers/char/tpm/tpm2-cmd.c @@ -773,7 +773,6 @@ void tpm2_shutdown(struct tpm_chip *chip, u16 shutdown_type) dev_warn(&chip->dev, "transmit returned %d while stopping the TPM", rc); } -EXPORT_SYMBOL_GPL(tpm2_shutdown); /* * tpm2_calc_ordinal_duration() - maximum duration for a command diff --git a/drivers/char/tpm/tpm_crb.c b/drivers/char/tpm/tpm_crb.c index a12b31940344..ec734de87b76 100644 --- a/drivers/char/tpm/tpm_crb.c +++ b/drivers/char/tpm/tpm_crb.c @@ -344,9 +344,6 @@ static int crb_acpi_remove(struct acpi_device *device) struct device *dev = &device->dev; struct tpm_chip *chip = dev_get_drvdata(dev); - if (chip->flags & TPM_CHIP_FLAG_TPM2) - tpm2_shutdown(chip, TPM2_SU_CLEAR); - tpm_chip_unregister(chip); return 0; diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c index 18236f66c084..0b0d44f9aaf2 100644 --- a/drivers/char/tpm/tpm_tis.c +++ b/drivers/char/tpm/tpm_tis.c @@ -653,9 +653,6 @@ static void tpm_tis_remove(struct tpm_chip *chip) void __iomem *reg = chip->vendor.iobase + TPM_INT_ENABLE(chip->vendor.locality); - if (chip->flags & TPM_CHIP_FLAG_TPM2) - tpm2_shutdown(chip, TPM2_SU_CLEAR); - iowrite32(~TPM_GLOBAL_INT_ENABLE & ioread32(reg), reg); release_locality(chip, chip->vendor.locality, 1); } |