[U-Boot] [PATCH v1] ARM: socfpga: stratix10: Return valid error code from FPGA driver

[chee.hong.ang at intel.com]

From: "Ang, Chee Hong" <chee.hong.ang at intel.com>

This patch prevent the Stratix 10 FPGA driver incorrectly return the
transaction ID as the mailbox error code. It should always return the
actual mailbox error code from SDM firmware.

Signed-off-by: Ang, Chee Hong <chee.hong.ang at intel.com>
---
 drivers/fpga/stratix10.c | 17 ++++++-----------
 1 file changed, 6 insertions(+), 11 deletions(-)

diff --git a/drivers/fpga/stratix10.c b/drivers/fpga/stratix10.c
index aae0521..d8e3250 100644
--- a/drivers/fpga/stratix10.c
+++ b/drivers/fpga/stratix10.c
@@ -172,7 +172,7 @@ static int send_reconfig_data(const void *rbf_data, size_t rbf_size,
 	u32 resp_windex = 0;
 	u32 resp_count = 0;
 	u32 xfer_count = 0;
-	u8 resp_err = 0;
+	int resp_err = 0;
 	u8 cmd_id = 1;
 	u32 args[3];
 	int ret;
@@ -195,11 +195,9 @@ static int send_reconfig_data(const void *rbf_data, size_t rbf_size,
 				rbf_size = 0;
 			}
 
-			ret = mbox_send_cmd_only(cmd_id, MBOX_RECONFIG_DATA,
+			resp_err = mbox_send_cmd_only(cmd_id, MBOX_RECONFIG_DATA,
 						 MBOX_CMD_INDIRECT, 3, args);
-			if (ret) {
-				resp_err = 1;
-			} else {
+			if (!resp_err) {
 				xfer_count++;
 				cmd_id = add_transfer(xfer_pending,
 						      MBOX_RESP_BUFFER_SIZE,
@@ -222,11 +220,8 @@ static int send_reconfig_data(const void *rbf_data, size_t rbf_size,
 
 			/* Check for response's status */
 			if (!resp_err) {
-				ret = MBOX_RESP_ERR_GET(resp_hdr);
-				debug("Response error code: %08x\n", ret);
-				/* Error in response */
-				if (ret)
-					resp_err = 1;
+				resp_err = MBOX_RESP_ERR_GET(resp_hdr);
+				debug("Response error code: %08x\n", resp_err);
 			}
 
 			ret = get_and_clr_transfer(xfer_pending,
@@ -239,7 +234,7 @@ static int send_reconfig_data(const void *rbf_data, size_t rbf_size,
 			}
 
 			if (resp_err && !xfer_count)
-				return ret;
+				return resp_err;
 		}
 	}
 
-- 
2.7.4