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| author |   Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2025-06-30 14:12:05 +0200 |
|---|---|---|
| committer |   Bjorn Andersson <andersson@kernel.org> | 2025-07-16 22:50:55 -0500 |
| commit | 7ab36b51c6bee56e1a1939063dd10d602fe49d13 (patch) | |
| tree | dba72bc2938079db80b74cb96872deafe47b018b /tools/perf | |
| parent | firmware: qcom: scm: initialize tzmem before marking SCM as available (diff) | |
| download | wireguard-linux-7ab36b51c6bee56e1a1939063dd10d602fe49d13.tar.xz wireguard-linux-7ab36b51c6bee56e1a1939063dd10d602fe49d13.zip | |
firmware: qcom: scm: request the waitqueue irq *after* initializing SCM
There's a subtle race in the SCM driver: we assign the __scm pointer
before requesting the waitqueue interrupt. Assigning __scm marks the SCM
API as ready to accept calls. It's possible that a user makes a call
right after we set __scm and the firmware raises an interrupt before the
driver's ready to service it. Move the __scm assignment after we request
the interrupt.
This has the added benefit of allowing us to drop the goto label.
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Link: https://lore.kernel.org/r/20250630-qcom-scm-race-v2-4-fa3851c98611@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Diffstat (limited to 'tools/perf')
0 files changed, 0 insertions, 0 deletions