[RFC PATCH v3 3/4] Revert "tpm: tpm_crb_ffa: try to probe tpm_crb_ffa when it's built-in"

[Jonathan McDowell]

From: Yeoreum Yun <yeoreum.yun at arm.com>

This reverts commit 746d9e9f62a6e8ba0eba2b83fc61cfe7fa8797ce.

Now that IMA will retry in the late_initcall_sync level if the TPM is
not available at first, this change is no longer required.

Signed-off-by: Yeoreum Yun <yeoreum.yun at arm.com>
Signed-off-by: Jonathan McDowell <noodles at meta.com>
---
 drivers/char/tpm/tpm_crb_ffa.c | 19 +++----------------
 1 file changed, 3 insertions(+), 16 deletions(-)

diff --git a/drivers/char/tpm/tpm_crb_ffa.c b/drivers/char/tpm/tpm_crb_ffa.c
index 99f1c1e5644b..05f19c0ebf82 100644
--- a/drivers/char/tpm/tpm_crb_ffa.c
+++ b/drivers/char/tpm/tpm_crb_ffa.c
@@ -123,7 +123,6 @@ struct tpm_crb_ffa {
 };
 
 static struct tpm_crb_ffa *tpm_crb_ffa;
-static struct ffa_driver tpm_crb_ffa_driver;
 
 static int tpm_crb_ffa_to_linux_errno(int errno)
 {
@@ -177,23 +176,13 @@ static int tpm_crb_ffa_to_linux_errno(int errno)
  */
 int tpm_crb_ffa_init(void)
 {
-	int ret = 0;
-
-	if (!IS_MODULE(CONFIG_TCG_ARM_CRB_FFA)) {
-		ret = ffa_register(&tpm_crb_ffa_driver);
-		if (ret) {
-			tpm_crb_ffa = ERR_PTR(-ENODEV);
-			return ret;
-		}
-	}
-
 	if (!tpm_crb_ffa)
-		ret = -ENOENT;
+		return -ENOENT;
 
 	if (IS_ERR_VALUE(tpm_crb_ffa))
-		ret = -ENODEV;
+		return -ENODEV;
 
-	return ret;
+	return 0;
 }
 EXPORT_SYMBOL_GPL(tpm_crb_ffa_init);
 
@@ -405,9 +394,7 @@ static struct ffa_driver tpm_crb_ffa_driver = {
 	.id_table = tpm_crb_ffa_device_id,
 };
 
-#ifdef MODULE
 module_ffa_driver(tpm_crb_ffa_driver);
-#endif
 
 MODULE_AUTHOR("Arm");
 MODULE_DESCRIPTION("TPM CRB FFA driver");
-- 
2.53.0