linux-kernel - [PATCH 5.11 150/775] x86/sgx: Fix the return type of sgx

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Date:   Mon,  1 Mar 2021 17:05:18 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Sami Tolvanen <samitolvanen@...gle.com>,
        Borislav Petkov <bp@...e.de>,
        Darren Kenny <darren.kenny@...cle.com>,
        Jarkko Sakkinen <jarkko@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.11 150/775] x86/sgx: Fix the return type of sgx_init()

From: Sami Tolvanen <samitolvanen@...gle.com>

[ Upstream commit 31bf92881714fe9962d43d097b5114a9b4ad0a12 ]

device_initcall() expects a function of type initcall_t, which returns
an integer. Change the signature of sgx_init() to match.

Fixes: e7e0545299d8c ("x86/sgx: Initialize metadata for Enclave Page Cache (EPC) sections")
Signed-off-by: Sami Tolvanen <samitolvanen@...gle.com>
Signed-off-by: Borislav Petkov <bp@...e.de>
Reviewed-by: Darren Kenny <darren.kenny@...cle.com>
Reviewed-by: Jarkko Sakkinen <jarkko@...nel.org>
Link: https://lkml.kernel.org/r/20210113232311.277302-1-samitolvanen@google.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/x86/kernel/cpu/sgx/main.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kernel/cpu/sgx/main.c b/arch/x86/kernel/cpu/sgx/main.c
index c519fc5f69480..8df81a3ed9457 100644
--- a/arch/x86/kernel/cpu/sgx/main.c
+++ b/arch/x86/kernel/cpu/sgx/main.c
@@ -700,25 +700,27 @@ static bool __init sgx_page_cache_init(void)
 	return true;
 }
 
-static void __init sgx_init(void)
+static int __init sgx_init(void)
 {
 	int ret;
 	int i;
 
 	if (!cpu_feature_enabled(X86_FEATURE_SGX))
-		return;
+		return -ENODEV;
 
 	if (!sgx_page_cache_init())
-		return;
+		return -ENOMEM;
 
-	if (!sgx_page_reclaimer_init())
+	if (!sgx_page_reclaimer_init()) {
+		ret = -ENOMEM;
 		goto err_page_cache;
+	}
 
 	ret = sgx_drv_init();
 	if (ret)
 		goto err_kthread;
 
-	return;
+	return 0;
 
 err_kthread:
 	kthread_stop(ksgxd_tsk);
@@ -728,6 +730,8 @@ err_page_cache:
 		vfree(sgx_epc_sections[i].pages);
 		memunmap(sgx_epc_sections[i].virt_addr);
 	}
+
+	return ret;
 }
 
 device_initcall(sgx_init);
-- 
2.27.0