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path: root/drivers/crypto/ccp
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-rw-r--r--drivers/crypto/ccp/platform-access.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/crypto/ccp/platform-access.c b/drivers/crypto/ccp/platform-access.c
index 94367bc49e..1b8ed33897 100644
--- a/drivers/crypto/ccp/platform-access.c
+++ b/drivers/crypto/ccp/platform-access.c
@@ -118,9 +118,16 @@ int psp_send_platform_access_msg(enum psp_platform_access_msg msg,
goto unlock;
}
- /* Store the status in request header for caller to investigate */
+ /*
+ * Read status from PSP. If status is non-zero, it indicates an error
+ * occurred during "processing" of the command.
+ * If status is zero, it indicates the command was "processed"
+ * successfully, but the result of the command is in the payload.
+ * Return both cases to the caller as -EIO to investigate.
+ */
cmd_reg = ioread32(cmd);
- req->header.status = FIELD_GET(PSP_CMDRESP_STS, cmd_reg);
+ if (FIELD_GET(PSP_CMDRESP_STS, cmd_reg))
+ req->header.status = FIELD_GET(PSP_CMDRESP_STS, cmd_reg);
if (req->header.status) {
ret = -EIO;
goto unlock;