linux-kernel - [PATCH 4.19 022/105] crypto: ccp - Do not free psp_master when PLATFORM

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Date:   Mon, 20 May 2019 14:13:28 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Tom Lendacky <thomas.lendacky@....com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Gary Hook <gary.hook@....com>,
        Brijesh Singh <brijesh.singh@....com>
Subject: [PATCH 4.19 022/105] crypto: ccp - Do not free psp_master when PLATFORM_INIT fails

From: Singh, Brijesh <brijesh.singh@....com>

commit f5a2aeb8b254c764772729a6e48d4e0c914bb56a upstream.

Currently, we free the psp_master if the PLATFORM_INIT fails during the
SEV FW probe. If psp_master is freed then driver does not invoke the PSP
FW. As per SEV FW spec, there are several commands (PLATFORM_RESET,
PLATFORM_STATUS, GET_ID etc) which can be executed in the UNINIT state
We should not free the psp_master when PLATFORM_INIT fails.

Fixes: 200664d5237f ("crypto: ccp: Add SEV support")
Cc: Tom Lendacky <thomas.lendacky@....com>
Cc: Herbert Xu <herbert@...dor.apana.org.au>
Cc: Gary Hook <gary.hook@....com>
Cc: stable@...r.kernel.org # 4.19.y
Signed-off-by: Brijesh Singh <brijesh.singh@....com>
Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/crypto/ccp/psp-dev.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/crypto/ccp/psp-dev.c
+++ b/drivers/crypto/ccp/psp-dev.c
@@ -935,7 +935,7 @@ void psp_pci_init(void)
 	rc = sev_platform_init(&error);
 	if (rc) {
 		dev_err(sp->dev, "SEV: failed to INIT error %#x\n", error);
-		goto err;
+		return;
 	}
 
 	dev_info(sp->dev, "SEV API:%d.%d build:%d\n", psp_master->api_major,