crypto: ccp - Do not free psp_master when PLATFORM_INIT fails

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@amd.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Gary Hook <gary.hook@amd.com>
Cc: stable@vger.kernel.org # 4.19.y
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/crypto/ccp/psp-dev.c b/drivers/crypto/ccp/psp-dev.c
index 72790d88236d4d73b56c5f1d26efcbfadc033c6b..1603dc8d2d7512077f487eea4b19c927f7b9097c 100644 (file)
--- 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,