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coresight: tpda: fix the logic to setup the element size

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Some TPDM devices support both CMB and DSB datasets, requiring
the system to enable the port with both corresponding element sizes.

Currently, the logic treats tpdm_read_element_size as successful if
the CMB element size is retrieved correctly, regardless of whether
the DSB element size is obtained. This behavior causes issues
when parsing data from TPDM devices that depend on both element sizes.

To address this, the function should explicitly fail if the DSB
element size cannot be read correctly.

Fixes: e6d7f5252f ("coresight-tpda: Add support to configure CMB element")
Reviewed-by: James Clark <james.clark@linaro.org>
Signed-off-by: Jie Gan <jie.gan@oss.qualcomm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20250906-fix_element_size_issue-v2-1-dbb0ac2541a9@oss.qualcomm.com
This commit is contained in:
Jie Gan 2025-09-06 07:53:04 +08:00 committed by Suzuki K Poulose
parent 8a55c161f7
commit 43e0a92c04
1 changed files with 3 additions and 0 deletions
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3
drivers/hwtracing/coresight/coresight-tpda.c
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@ -71,6 +71,8 @@ static int tpdm_read_element_size(struct tpda_drvdata *drvdata,
if (tpdm_data->dsb) {
rc = fwnode_property_read_u32(dev_fwnode(csdev->dev.parent),
"qcom,dsb-element-bits", &drvdata->dsb_esize);
if (rc)
goto out;
}
if (tpdm_data->cmb) {
@ -78,6 +80,7 @@ static int tpdm_read_element_size(struct tpda_drvdata *drvdata,
"qcom,cmb-element-bits", &drvdata->cmb_esize);
}
out:
if (rc)
dev_warn_once(&csdev->dev,
"Failed to read TPDM Element size: %d\n", rc);