linux-kernel - [PATCH 10/11] crypto: ccp: Get rid of __sev_platform_init

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Date:   Thu, 16 Feb 2023 13:46:01 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     Dionna Glaze <dionnaglaze@...gle.com>,
        Joerg Roedel <jroedel@...e.de>,
        Michael Roth <michael.roth@....com>,
        Nikunj A Dadhania <nikunj@....com>,
        Peter Gonda <pgonda@...gle.com>,
        Tom Lendacky <Thomas.Lendacky@....com>,
        linux-coco@...ts.linux.dev, x86@...nel.org
Subject: [PATCH 10/11] crypto: ccp: Get rid of __sev_platform_init_locked()'s local function pointer

From: "Borislav Petkov (AMD)" <bp@...en8.de>

Add a wrapper instead.

No functional changes.

Signed-off-by: Borislav Petkov (AMD) <bp@...en8.de>
---
 drivers/crypto/ccp/sev-dev.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c
index f60bb73edfda..c54cc8f9a284 100644
--- a/drivers/crypto/ccp/sev-dev.c
+++ b/drivers/crypto/ccp/sev-dev.c
@@ -440,11 +440,18 @@ static int __sev_init_ex_locked(int *error)
 	return __sev_do_cmd_locked(SEV_CMD_INIT_EX, &data, error);
 }
 
+static inline int __sev_do_init_locked(int *psp_ret)
+{
+	if (sev_init_ex_buffer)
+		return __sev_init_ex_locked(psp_ret);
+	else
+		return __sev_init_locked(psp_ret);
+}
+
 static int __sev_platform_init_locked(int *error)
 {
 	int rc = 0, psp_ret = SEV_RET_NO_FW_CALL;
 	struct psp_device *psp = psp_master;
-	int (*init_function)(int *error);
 	struct sev_device *sev;
 
 	if (!psp || !psp->sev_data)
@@ -456,15 +463,12 @@ static int __sev_platform_init_locked(int *error)
 		return 0;
 
 	if (sev_init_ex_buffer) {
-		init_function = __sev_init_ex_locked;
 		rc = sev_read_init_ex_file();
 		if (rc)
 			return rc;
-	} else {
-		init_function = __sev_init_locked;
 	}
 
-	rc = init_function(&psp_ret);
+	rc = __sev_do_init_locked(&psp_ret);
 	if (rc && psp_ret == SEV_RET_SECURE_DATA_INVALID) {
 		/*
 		 * Initialization command returned an integrity check failure
@@ -475,7 +479,7 @@ static int __sev_platform_init_locked(int *error)
 		 */
 		dev_err(sev->dev,
 "SEV: retrying INIT command because of SECURE_DATA_INVALID error. Retrying once to reset PSP SEV state.");
-		rc = init_function(&psp_ret);
+		rc = __sev_do_init_locked(&psp_ret);
 	}
 
 	if (error)
-- 
2.35.1