linux-kernel - [PATCH 04/12] soundwire: stream: set DEPREPARED state earlier

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20241104032358.669705-5-yung-chuan.liao@linux.intel.com>
Date: Mon,  4 Nov 2024 03:23:50 +0000
From: Bard Liao <yung-chuan.liao@...ux.intel.com>
To: linux-sound@...r.kernel.org,
	vkoul@...nel.org
Cc: vinod.koul@...aro.org,
	linux-kernel@...r.kernel.org,
	pierre-louis.bossart@...ux.dev,
	bard.liao@...el.com
Subject: [PATCH 04/12] soundwire: stream: set DEPREPARED state earlier

From: Pierre-Louis Bossart <pierre-louis.bossart@...ux.dev>

The existing logic is problematic in that we deprepare all the ports,
but still take into account the stream for bit allocation by just
walking through the bus->m_rt list.

This patch sets the state earlier, so that such DEPREPARED streams can
be skipped in the bandwidth allocation (to be implemented in a
follow-up patch).

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.dev>
Signed-off-by: Bard Liao <yung-chuan.liao@...ux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>
---
 drivers/soundwire/stream.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/soundwire/stream.c b/drivers/soundwire/stream.c
index 7aa4900dcf31..795017c8081a 100644
--- a/drivers/soundwire/stream.c
+++ b/drivers/soundwire/stream.c
@@ -1643,8 +1643,15 @@ static int _sdw_deprepare_stream(struct sdw_stream_runtime *stream)
 {
 	struct sdw_master_runtime *m_rt;
 	struct sdw_bus *bus;
+	int state = stream->state;
 	int ret = 0;
 
+	/*
+	 * first mark the state as DEPREPARED so that it is not taken into account
+	 * for bit allocation
+	 */
+	stream->state = SDW_STREAM_DEPREPARED;
+
 	list_for_each_entry(m_rt, &stream->master_list, stream_node) {
 		bus = m_rt->bus;
 		/* De-prepare port(s) */
@@ -1652,6 +1659,7 @@ static int _sdw_deprepare_stream(struct sdw_stream_runtime *stream)
 		if (ret < 0) {
 			dev_err(bus->dev,
 				"De-prepare port(s) failed: %d\n", ret);
+			stream->state = state;
 			return ret;
 		}
 
@@ -1665,6 +1673,7 @@ static int _sdw_deprepare_stream(struct sdw_stream_runtime *stream)
 			if (ret < 0) {
 				dev_err(bus->dev, "Compute params failed: %d\n",
 					ret);
+				stream->state = state;
 				return ret;
 			}
 		}
@@ -1673,11 +1682,11 @@ static int _sdw_deprepare_stream(struct sdw_stream_runtime *stream)
 		ret = sdw_program_params(bus, false);
 		if (ret < 0) {
 			dev_err(bus->dev, "%s: Program params failed: %d\n", __func__, ret);
+			stream->state = state;
 			return ret;
 		}
 	}
 
-	stream->state = SDW_STREAM_DEPREPARED;
 	return do_bank_switch(stream);
 }
 
-- 
2.34.1