firmware: qcom: scm: Fix missing smp_load_acquire()

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__scm is published in qcom_scm_probe() with smp_store_release()
but qcom_scm_set_download_mode() reads it directly without
smp_load_acquire(), creating a potential ordering violation where a
CPU could observe a stale or partially initialised __scm pointer.

Use smp_load_acquire() to acquire __scm in the
qcom_scm_set_download_mode() function.

Signed-off-by: Mukesh Ojha <mukesh.ojha@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260624190830.3131112-4-mukesh.ojha@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

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Mukesh Ojha 2026-06-25 00:38:14 +05:30 • committed by Bjorn Andersson

parent bc3c98b776

commit d9603a7790

1 changed files with 14 additions and 11 deletions

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drivers/firmware/qcom/qcom_scm.c

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