crypto: ccp - Fix SEV_VERSION_GREATER_OR_EQUAL

SEV_VERSION_GREATER_OR_EQUAL() will fail if upgrading from 2.2 to 3.1, for
example, because the minor version is not equal to or greater than the
major.

Fix this and move to a static inline function for appropriate type
checking.

Fixes: edd303ff0e9e ("crypto: ccp - Add DOWNLOAD_FIRMWARE SEV command")
Reported-by: Cfir Cohen <cfir@google.com>
Signed-off-by: David Rientjes <rientjes@google.com>
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
Acked-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 12 insertions, 7 deletions

diff --git a/drivers/crypto/ccp/psp-dev.c b/drivers/crypto/ccp/psp-dev.c
index 3e712f385bc1..2ff87b4d9348 100644
--- a/drivers/crypto/ccp/psp-dev.c
+++ b/drivers/crypto/ccp/psp-dev.c
@@ -24,10 +24,6 @@
 #include "sp-dev.h"
 #include "psp-dev.h"
 
-#define SEV_VERSION_GREATER_OR_EQUAL(_maj, _min)        \
-                ((psp_master->api_major) >= _maj &&     \
-                 (psp_master->api_minor) >= _min)
-
 #define DEVICE_NAME             "sev"
 #define SEV_FW_FILE             "amd/sev.fw"
 #define SEV_FW_NAME_SIZE        64
@@ -47,6 +43,15 @@ MODULE_PARM_DESC(psp_probe_timeout, " default timeout value, in seconds, during
 static bool psp_dead;
 static int psp_timeout;
 
+static inline bool sev_version_greater_or_equal(u8 maj, u8 min)
+{
+        if (psp_master->api_major > maj)
+                return true;
+        if (psp_master->api_major == maj && psp_master->api_minor >= min)
+                return true;
+        return false;
+}
+
 static struct psp_device *psp_alloc_struct(struct sp_device *sp)
 {
         struct device *dev = sp->dev;
@@ -588,7 +593,7 @@ static int sev_ioctl_do_get_id2(struct sev_issue_cmd *argp)
         int ret;
 
         /* SEV GET_ID is available from SEV API v0.16 and up */
-        if (!SEV_VERSION_GREATER_OR_EQUAL(0, 16))
+        if (!sev_version_greater_or_equal(0, 16))
                 return -ENOTSUPP;
 
         if (copy_from_user(&input, (void __user *)argp->data, sizeof(input)))
@@ -651,7 +656,7 @@ static int sev_ioctl_do_get_id(struct sev_issue_cmd *argp)
         int ret;
 
         /* SEV GET_ID available from SEV API v0.16 and up */
-        if (!SEV_VERSION_GREATER_OR_EQUAL(0, 16))
+        if (!sev_version_greater_or_equal(0, 16))
                 return -ENOTSUPP;
 
         /* SEV FW expects the buffer it fills with the ID to be
@@ -1053,7 +1058,7 @@ void psp_pci_init(void)
                 psp_master->sev_state = SEV_STATE_UNINIT;
         }
 
-        if (SEV_VERSION_GREATER_OR_EQUAL(0, 15) &&
+        if (sev_version_greater_or_equal(0, 15) &&
             sev_update_firmware(psp_master->dev) == 0)
                 sev_get_api_version();