This is a note to let you know that I've just added the patch titled
coresight: trbe: Allocate platform data per device
to the 6.5-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
coresight-trbe-allocate-platform-data-per-device.patch
and it can be found in the queue-6.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 7e7e5f915504cb759c989c794c6b423c6320188b
Author: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
Date: Wed Aug 16 13:51:50 2023 +0100
coresight: trbe: Allocate platform data per device
[ Upstream commit 39744738a67de9153d73e11817937c0004feab2e ]
Coresight TRBE driver shares a single platform data (which is empty btw).
However, with the commit 4e8fe7e5c3a5
("coresight: Store pointers to connections rather than an array of them")
the coresight core would free up the pdata, resulting in multiple attempts
to free the same pdata for TRBE instances. Fix this by allocating a pdata per
coresight_device.
Fixes: 4e8fe7e5c3a5 ("coresight: Store pointers to connections rather than an array of them")
Link: https://lore.kernel.org/r/20230814093813.19152-3-hejunhao3@xxxxxxxxxx
Reported-by: Junhao He <hejunhao3@xxxxxxxxxx>
Cc: Anshuman Khandual <anshuman.khandual@xxxxxxx>
Cc: James Clark <james.clark@xxxxxxx>
Tested-by: Junhao He <hejunhao3@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20230816141008.535450-2-suzuki.poulose@xxxxxxx
Signed-off-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/hwtracing/coresight/coresight-trbe.c b/drivers/hwtracing/coresight/coresight-trbe.c
index 7720619909d65..8e4eb37e66e82 100644
--- a/drivers/hwtracing/coresight/coresight-trbe.c
+++ b/drivers/hwtracing/coresight/coresight-trbe.c
@@ -1244,10 +1244,13 @@ static void arm_trbe_register_coresight_cpu(struct trbe_drvdata *drvdata, int cp
if (!desc.name)
goto cpu_clear;
+ desc.pdata = coresight_get_platform_data(dev);
+ if (IS_ERR(desc.pdata))
+ goto cpu_clear;
+
desc.type = CORESIGHT_DEV_TYPE_SINK;
desc.subtype.sink_subtype = CORESIGHT_DEV_SUBTYPE_SINK_PERCPU_SYSMEM;
desc.ops = &arm_trbe_cs_ops;
- desc.pdata = dev_get_platdata(dev);
desc.groups = arm_trbe_groups;
desc.dev = dev;
trbe_csdev = coresight_register(&desc);
@@ -1479,7 +1482,6 @@ static void arm_trbe_remove_irq(struct trbe_drvdata *drvdata)
static int arm_trbe_device_probe(struct platform_device *pdev)
{
- struct coresight_platform_data *pdata;
struct trbe_drvdata *drvdata;
struct device *dev = &pdev->dev;
int ret;
@@ -1494,12 +1496,7 @@ static int arm_trbe_device_probe(struct platform_device *pdev)
if (!drvdata)
return -ENOMEM;
- pdata = coresight_get_platform_data(dev);
- if (IS_ERR(pdata))
- return PTR_ERR(pdata);
-
dev_set_drvdata(dev, drvdata);
- dev->platform_data = pdata;
drvdata->pdev = pdev;
ret = arm_trbe_probe_irq(pdev, drvdata);
if (ret)
