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tpm: tpm_crb: relinquish locality on error path.

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[ Upstream commit 1fbad3028664e114d210dc65d768947a3a553eaa ]

In crb_map_io() function, __crb_request_locality() is called prior
to crb_cmd_ready(), but if one of the consecutive function fails
the flow bails out instead of trying to relinquish locality.
This patch adds goto jump to __crb_relinquish_locality() on the error path.

Fixes: 888d867df441 (tpm: cmd_ready command can be issued only after granting locality)
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Winkler, Tomas 2018-04-07 19:12:36 +03:00 committed by Greg Kroah-Hartman
parent 3c0cff34e9
commit 9de255666c
1 changed files with 7 additions and 3 deletions
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10
drivers/char/tpm/tpm_crb.c
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@ -520,8 +520,10 @@ static int crb_map_io(struct acpi_device *device, struct crb_priv *priv,
priv->regs_t = crb_map_res(dev, priv, &io_res, buf->control_address,
sizeof(struct crb_regs_tail));
if (IS_ERR(priv->regs_t))
return PTR_ERR(priv->regs_t);
if (IS_ERR(priv->regs_t)) {
ret = PTR_ERR(priv->regs_t);
goto out_relinquish_locality;
}
/*
* PTT HW bug w/a: wake up the device to access
@ -529,7 +531,7 @@ static int crb_map_io(struct acpi_device *device, struct crb_priv *priv,
*/
ret = __crb_cmd_ready(dev, priv);
if (ret)
return ret;
goto out_relinquish_locality;
pa_high = ioread32(&priv->regs_t->ctrl_cmd_pa_high);
pa_low = ioread32(&priv->regs_t->ctrl_cmd_pa_low);
@ -574,6 +576,8 @@ out:
__crb_go_idle(dev, priv);
out_relinquish_locality:
__crb_relinquish_locality(dev, priv, 0);
return ret;