[PATCH AUTOSEL 6.0 28/67] soundwire: cadence: Don't overwrite msg->buf during write commands

[PATCH AUTOSEL 6.0 28/67] soundwire: cadence: Don't overwrite msg->buf during write commands

[Sasha Levin]

From: Richard Fitzgerald <rf@opensource.cirrus.com>

[ Upstream commit ba05b39d265bdd16913f7684600d9d41e2796745 ]

The buf passed in struct sdw_msg must only be written for a READ,
in that case the RDATA part of the response is the data value of the
register.

For a write command there is no RDATA, and buf should be assumed to
be const and unmodifable. The original caller should not expect its data
buffer to be corrupted by an sdw_nwrite().

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20220916103505.1562210-1-rf@opensource.cirrus.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/soundwire/cadence_master.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c
index 4fbb19557f5e..42c5fae80efb 100644
--- a/drivers/soundwire/cadence_master.c
+++ b/drivers/soundwire/cadence_master.c
@@ -544,9 +544,12 @@ cdns_fill_msg_resp(struct sdw_cdns *cdns,
 		return SDW_CMD_IGNORED;
 	}
 
-	/* fill response */
-	for (i = 0; i < count; i++)
-		msg->buf[i + offset] = FIELD_GET(CDNS_MCP_RESP_RDATA, cdns->response_buf[i]);
+	if (msg->flags == SDW_MSG_FLAG_READ) {
+		/* fill response */
+		for (i = 0; i < count; i++)
+			msg->buf[i + offset] = FIELD_GET(CDNS_MCP_RESP_RDATA,
+							 cdns->response_buf[i]);
+	}
 
 	return SDW_CMD_OK;
 }
-- 
2.35.1

[PATCH AUTOSEL 6.0 29/67] soundwire: intel: fix error handling on dai registration issues

[Sasha Levin]

From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

[ Upstream commit c6867cda906aadbce5e71efde9c78a26108b2bad ]

The call to intel_register_dai() may fail because of memory allocation
issues or problems reported by the ASoC core. In all cases, when a
error is thrown the component is not registered, it's invalid to
unregister it.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20220919175721.354679-2-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/soundwire/intel.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
index 89d1d0d021fc..af6c1a93372d 100644
--- a/drivers/soundwire/intel.c
+++ b/drivers/soundwire/intel.c
@@ -1429,7 +1429,6 @@ int intel_link_startup(struct auxiliary_device *auxdev)
 	ret = intel_register_dai(sdw);
 	if (ret) {
 		dev_err(dev, "DAI registration failed: %d\n", ret);
-		snd_soc_unregister_component(dev);
 		goto err_interrupt;
 	}
 
-- 
2.35.1