diff options
| author | Jie Gan <jie.gan@oss.qualcomm.com> | 2025-05-22 08:50:16 +0800 |
|---|---|---|
| committer | Bjorn Andersson <andersson@kernel.org> | 2025-06-17 22:38:44 -0500 |
| commit | bd4f35786d5f0798cc1f8c187a81a7c998e6c58f (patch) | |
| tree | af4e386939e7145fa2e958255dfb88a140b5d18a /rust/helpers/task.c | |
| parent | a014ad1ae4ea1ec8c3ea3a66f09217f1bff937a8 (diff) | |
arm64: dts: qcom: qcs615: fix a crash issue caused by infinite loop for Coresight
An infinite loop has been created by the Coresight devices. When only a
source device is enabled, the coresight_find_activated_sysfs_sink function
is recursively invoked in an attempt to locate an active sink device,
ultimately leading to a stack overflow and system crash. Therefore, disable
the replicator1 to break the infinite loop and prevent a potential stack
overflow.
replicator1_out -> funnel_swao_in6 -> tmc_etf_swao_in -> tmc_etf_swao_out
| |
replicator1_in replicator_swao_in
| |
replicator0_out1 replicator_swao_out0
| |
replicator0_in funnel_in1_in3
| |
tmc_etf_out <- tmc_etf_in <- funnel_merg_out <- funnel_merg_in1 <- funnel_in1_out
[call trace]
dump_backtrace+0x9c/0x128
show_stack+0x20/0x38
dump_stack_lvl+0x48/0x60
dump_stack+0x18/0x28
panic+0x340/0x3b0
nmi_panic+0x94/0xa0
panic_bad_stack+0x114/0x138
handle_bad_stack+0x34/0xb8
__bad_stack+0x78/0x80
coresight_find_activated_sysfs_sink+0x28/0xa0 [coresight]
coresight_find_activated_sysfs_sink+0x5c/0xa0 [coresight]
coresight_find_activated_sysfs_sink+0x5c/0xa0 [coresight]
coresight_find_activated_sysfs_sink+0x5c/0xa0 [coresight]
coresight_find_activated_sysfs_sink+0x5c/0xa0 [coresight]
...
coresight_find_activated_sysfs_sink+0x5c/0xa0 [coresight]
coresight_enable_sysfs+0x80/0x2a0 [coresight]
side effect after the change:
Only trace data originating from AOSS can reach the ETF_SWAO and EUD sinks.
Fixes: bf469630552a ("arm64: dts: qcom: qcs615: Add coresight nodes")
Signed-off-by: Jie Gan <jie.gan@oss.qualcomm.com>
Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20250522005016.2148-1-jie.gan@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Diffstat (limited to 'rust/helpers/task.c')
0 files changed, 0 insertions, 0 deletions