[PATCH v2 5/5] soundwire: stream: Remove unnecessary gotos

[Charles Keepax]

There is a lot of code using gotos to skip small sections of code, this
is a fairly dubious use of a goto, especially when the level of
intentation is really low. Most of this code doesn't even breach 80
characters when naively shifted over.

Simplify the code a bit, by replacing these unnecessary gotos with
simple ifs.

Signed-off-by: Charles Keepax <ckeepax@xxxxxxxxxxxxxxxxxxxxx>
---

Changes since v1:
 - Split out the inversion of the alloc_*_rt logic

Worth noting this patch has no functional corrections it is just a
stylistic change, so as Pierre said on v1 we could just leave things
as is. Personally, I would prefer to merge it though, whilst the diff
is a little more of a pain to review (hopefully eased somewhat by
splitting out the alloc_*_rt logic into a separate patch), the
resulting code reads much nicer and the code will be read a lot more
times than this patch will be.

Thanks,
Charles

 drivers/soundwire/stream.c | 124 +++++++++++++++++--------------------
 1 file changed, 56 insertions(+), 68 deletions(-)

diff --git a/drivers/soundwire/stream.c b/drivers/soundwire/stream.c
index df5600a80c174..93baca08a0dea 100644
--- a/drivers/soundwire/stream.c
+++ b/drivers/soundwire/stream.c
@@ -1355,25 +1355,23 @@ static int _sdw_prepare_stream(struct sdw_stream_runtime *stream,
 			return -EINVAL;
 		}
 
-		if (!update_params)
-			goto program_params;
-
-		/* Increment cumulative bus bandwidth */
-		/* TODO: Update this during Device-Device support */
-		bus->params.bandwidth += m_rt->stream->params.rate *
-			m_rt->ch_count * m_rt->stream->params.bps;
-
-		/* Compute params */
-		if (bus->compute_params) {
-			ret = bus->compute_params(bus);
-			if (ret < 0) {
-				dev_err(bus->dev, "Compute params failed: %d\n",
-					ret);
-				goto restore_params;
+		if (update_params) {
+			/* Increment cumulative bus bandwidth */
+			/* TODO: Update this during Device-Device support */
+			bus->params.bandwidth += m_rt->stream->params.rate *
+				m_rt->ch_count * m_rt->stream->params.bps;
+
+			/* Compute params */
+			if (bus->compute_params) {
+				ret = bus->compute_params(bus);
+				if (ret < 0) {
+					dev_err(bus->dev, "Compute params failed: %d\n",
+						ret);
+					goto restore_params;
+				}
 			}
 		}
 
-program_params:
 		/* Program params */
 		ret = sdw_program_params(bus, true);
 		if (ret < 0) {
@@ -1876,30 +1874,25 @@ int sdw_stream_add_master(struct sdw_bus *bus,
 	 * it first), if so skip allocation and go to configuration
 	 */
 	m_rt = sdw_master_rt_find(bus, stream);
-	if (m_rt)
-		goto skip_alloc_master_rt;
-
-	m_rt = sdw_master_rt_alloc(bus, stream);
 	if (!m_rt) {
-		dev_err(bus->dev, "%s: Master runtime alloc failed for stream:%s\n",
-			__func__, stream->name);
-		ret = -ENOMEM;
-		goto unlock;
-	}
-
-	alloc_master_rt = true;
-skip_alloc_master_rt:
-
-	if (sdw_master_port_allocated(m_rt))
-		goto skip_alloc_master_port;
+		m_rt = sdw_master_rt_alloc(bus, stream);
+		if (!m_rt) {
+			dev_err(bus->dev, "%s: Master runtime alloc failed for stream:%s\n",
+				__func__, stream->name);
+			ret = -ENOMEM;
+			goto unlock;
+		}
 
-	ret = sdw_master_port_alloc(m_rt, num_ports);
-	if (ret)
-		goto alloc_error;
+		alloc_master_rt = true;
+	}
 
-	stream->m_rt_count++;
+	if (!sdw_master_port_allocated(m_rt)) {
+		ret = sdw_master_port_alloc(m_rt, num_ports);
+		if (ret)
+			goto alloc_error;
 
-skip_alloc_master_port:
+		stream->m_rt_count++;
+	}
 
 	ret = sdw_master_rt_config(m_rt, stream_config);
 	if (ret < 0)
@@ -1992,46 +1985,41 @@ int sdw_stream_add_slave(struct sdw_slave *slave,
 	 * and go to configuration
 	 */
 	m_rt = sdw_master_rt_find(slave->bus, stream);
-	if (m_rt)
-		goto skip_alloc_master_rt;
-
-	/*
-	 * If this API is invoked by Slave first then m_rt is not valid.
-	 * So, allocate m_rt and add Slave to it.
-	 */
-	m_rt = sdw_master_rt_alloc(slave->bus, stream);
 	if (!m_rt) {
-		dev_err(&slave->dev, "%s: Master runtime alloc failed for stream:%s\n",
-			__func__, stream->name);
-		ret = -ENOMEM;
-		goto unlock;
-	}
+		/*
+		 * If this API is invoked by Slave first then m_rt is not valid.
+		 * So, allocate m_rt and add Slave to it.
+		 */
+		m_rt = sdw_master_rt_alloc(slave->bus, stream);
+		if (!m_rt) {
+			dev_err(&slave->dev, "%s: Master runtime alloc failed for stream:%s\n",
+				__func__, stream->name);
+			ret = -ENOMEM;
+			goto unlock;
+		}
 
-	alloc_master_rt = true;
+		alloc_master_rt = true;
+	}
 
-skip_alloc_master_rt:
 	s_rt = sdw_slave_rt_find(slave, stream);
-	if (s_rt)
-		goto skip_alloc_slave_rt;
-
-	s_rt = sdw_slave_rt_alloc(slave, m_rt);
 	if (!s_rt) {
-		dev_err(&slave->dev, "Slave runtime alloc failed for stream:%s\n", stream->name);
-		ret = -ENOMEM;
-		goto alloc_error;
-	}
-
-	alloc_slave_rt = true;
+		s_rt = sdw_slave_rt_alloc(slave, m_rt);
+		if (!s_rt) {
+			dev_err(&slave->dev, "Slave runtime alloc failed for stream:%s\n",
+				stream->name);
+			ret = -ENOMEM;
+			goto alloc_error;
+		}
 
-skip_alloc_slave_rt:
-	if (sdw_slave_port_allocated(s_rt))
-		goto skip_port_alloc;
+		alloc_slave_rt = true;
+	}
 
-	ret = sdw_slave_port_alloc(slave, s_rt, num_ports);
-	if (ret)
-		goto alloc_error;
+	if (!sdw_slave_port_allocated(s_rt)) {
+		ret = sdw_slave_port_alloc(slave, s_rt, num_ports);
+		if (ret)
+			goto alloc_error;
+	}
 
-skip_port_alloc:
 	ret =  sdw_master_rt_config(m_rt, stream_config);
 	if (ret)
 		goto unlock;
-- 
2.30.2