When issuing a host command whose request packet length is equal to the
maximum size (ie max_request_packet_size as returned by
EC_CMD_GET_PROTOCOL_INFO), the command currently fails with STM32H7 over
SPI host protocol.
The finger template upload through the EC_CMD_FP_TEMPLATE host command
fails due to the issue as it 'optimizes' the chunk length to the maximum
size. For now, workaround this issue by removing a 32-bit word (aka 4 bytes)
to max_request_packet_size, so we never hit this corner case.
Signed-off-by: Vincent Palatin <vpalatin@chromium.org>
BRANCH=none
BUG=b:78544921
TEST=On Meowth, run 'ectool --name=cros_fp fptemplate finger0.bin'
and see it succeeding.
Change-Id: I52072ddeb12534045c37ab30df301a60c8841199
Reviewed-on: https://chromium-review.googlesource.com/1026680
Commit-Ready: Vincent Palatin <vpalatin@chromium.org>
Tested-by: Vincent Palatin <vpalatin@chromium.org>
Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>
53019df3a6