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The STM32H743xI Errata document (rev Y) mentions in the paragraph 2.2.15 'Reading from AXI SRAM might lead to data read corruption': """ Read data might be corrupted when the following conditions are met: - Several read transactions are performed to the AXI SRAM, - and a master delays its data acceptance while a new transfer is requested. """ We can actually hit this under a fair interrupt load and two tasks running (e.g polling with the AP with host commands while doing fingerprint image acquisitions). So apply the proposed workaround and limit concurrent read access on AXI master to 1 by setting the READ_ISS_OVERRIDE bit in the AXI_TARG7_FN_MOD register. Signed-off-by: Vincent Palatin <vpalatin@chromium.org> BRANCH=none BUG=b:67081508 TEST=on ZerbleBarn or Meowth, run 'ectool fpmode capture vendor', poll in a tight loop with 'ectool fpmode'. No longer see random panics. Change-Id: I6270866b74645d53e4d65f07f65431d5dee11576 Reviewed-on: https://chromium-review.googlesource.com/926009 Commit-Ready: Vincent Palatin <vpalatin@chromium.org> Tested-by: Vincent Palatin <vpalatin@chromium.org> Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>