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tis: fix tpm_tis_remove()

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tpm_tis_remove() leads to calling tpm_tis_ready() with the IO region
unmapped and chip->locality == -1 (locality released). This leads to a
crash in mmio_write_bytes().

The patch implements these changes:

tpm_tis_remove(): Unmap the IO region after calling tpm_tis_cleanup().

tpm_tis_cleanup(): Request locality before IO output and releasing
locality.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
This commit is contained in:
Heinrich Schuchardt 2021-11-29 00:03:44 +01:00 committed by Ilias Apalodimas
parent ade37460a9
commit c3de051c41
2 changed files with 10 additions and 1 deletions
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6
drivers/tpm/tpm2_tis_core.c
View file

@ -378,8 +378,14 @@ out:
int tpm_tis_cleanup(struct udevice *dev)
{
struct tpm_chip *chip = dev_get_priv(dev);
int ret;
ret = tpm_tis_request_locality(dev, 0);
if (ret)
return ret;
tpm_tis_ready(dev);
tpm_tis_release_locality(dev, chip->locality);
return 0;

5
drivers/tpm/tpm2_tis_mmio.c
View file

@ -118,10 +118,13 @@ iounmap:
static int tpm_tis_remove(struct udevice *dev)
{
struct tpm_tis_chip_data *drv_data = (void *)dev_get_driver_data(dev);
int ret;
ret = tpm_tis_cleanup(dev);
iounmap(drv_data->iobase);
return tpm_tis_cleanup(dev);
return ret;
}
static const struct tpm_ops tpm_tis_ops = {