soundwire: bus: uniquify dev_err() for SCP_INT access

We have multiple cases where we read/write SCP_INT registers, but the
same error message in all cases. Add a distinct error message for each
case to help debug.

Reported-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

Author: plbossart

drivers/soundwire/bus.c

@@ -1274,15 +1274,15 @@ static int sdw_initialize_slave(struct sdw_slave *slave)
 		status = sdw_read_no_pm(slave, SDW_SCP_INT1);
 		if (status < 0) {
 			dev_err(&slave->dev,
-				"SDW_SCP_INT1 read failed:%d\n", status);
+				"SDW_SCP_INT1 (BUS_CLASH) read failed:%d\n", status);
 			return status;
 		}
 		if (status & SDW_SCP_INT1_BUS_CLASH) {
 			dev_warn(&slave->dev, "Bus clash detected before INT mask is enabled\n");
 			ret = sdw_write_no_pm(slave, SDW_SCP_INT1, SDW_SCP_INT1_BUS_CLASH);
 			if (ret < 0) {
 				dev_err(&slave->dev,
-					"SDW_SCP_INT1 write failed:%d\n", ret);
+					"SDW_SCP_INT1 (BUS_CLASH) write failed:%d\n", ret);
 				return ret;
 			}
 		}
@@ -1293,15 +1293,15 @@ static int sdw_initialize_slave(struct sdw_slave *slave)
 		status = sdw_read_no_pm(slave, SDW_SCP_INT1);
 		if (status < 0) {
 			dev_err(&slave->dev,
-				"SDW_SCP_INT1 read failed:%d\n", status);
+				"SDW_SCP_INT1 (PARITY) read failed:%d\n", status);
 			return status;
 		}
 		if (status & SDW_SCP_INT1_PARITY) {
 			dev_warn(&slave->dev, "PARITY error detected before INT mask is enabled\n");
 			ret = sdw_write_no_pm(slave, SDW_SCP_INT1, SDW_SCP_INT1_PARITY);
 			if (ret < 0) {
 				dev_err(&slave->dev,
-					"SDW_SCP_INT1 write failed:%d\n", ret);
+					"SDW_SCP_INT1 (PARITY) write failed:%d\n", ret);
 				return ret;
 			}
 
@@ -1637,23 +1637,23 @@ static int sdw_handle_slave_alerts(struct sdw_slave *slave)
 		ret = sdw_read_no_pm(slave, SDW_SCP_INT1);
 		if (ret < 0) {
 			dev_err(&slave->dev,
-				"SDW_SCP_INT1 read failed:%d\n", ret);
+				"SDW_SCP_INT1 recheck read failed:%d\n", ret);
 			goto io_err;
 		}
 		_buf = ret;
 
 		ret = sdw_nread_no_pm(slave, SDW_SCP_INTSTAT2, 2, _buf2);
 		if (ret < 0) {
 			dev_err(&slave->dev,
-				"SDW_SCP_INT2/3 read failed:%d\n", ret);
+				"SDW_SCP_INT2/3 recheck read failed:%d\n", ret);
 			goto io_err;
 		}
 
 		if (slave->prop.is_sdca) {
 			ret = sdw_read_no_pm(slave, SDW_DP0_INT);
 			if (ret < 0) {
 				dev_err(&slave->dev,
-					"SDW_DP0_INT read failed:%d\n", ret);
+					"SDW_DP0_INT recheck read failed:%d\n", ret);
 				goto io_err;
 			}
 			sdca_cascade = ret & SDW_DP0_SDCA_CASCADE;