From 17841419ab417d8bbd3958ae5b70c95efba74fae Mon Sep 17 00:00:00 2001
From: "Winkler, Tomas" <tomas.winkler@intel.com>
Date: Sat, 7 Apr 2018 19:12:36 +0300
Subject: [PATCH 4/7] tpm: tpm_crb: relinquish locality on error path.
References: bsc#1082555
Patch-mainline: v4.18-rc1
Git-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>
Acked-by: Michal Suchanek <msuchanek@suse.de>
---
drivers/char/tpm/tpm_crb.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/drivers/char/tpm/tpm_crb.c b/drivers/char/tpm/tpm_crb.c
index 9b1a95e2e147..f3c862a469a5 100644
--- a/drivers/char/tpm/tpm_crb.c
+++ b/drivers/char/tpm/tpm_crb.c
@@ -510,8 +510,10 @@ 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
@@ -519,7 +521,7 @@ 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);
@@ -564,6 +566,8 @@ static int crb_map_io(struct acpi_device *device, struct crb_priv *priv,
crb_go_idle(dev, priv);
+out_relinquish_locality:
+
__crb_relinquish_locality(dev, priv, 0);
return ret;
--
2.13.7