accel: ethosu: Ensure cmd stream ends with a stop op

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While the QSIZE register setting should prevent an out of bounds access
of the command stream, it is not clear whether the h/w generates an
interrupt in this case as is required (to prevent a timeout). As a stop op
is expected end of the command stream, let's just ensure it is present. A
stop op in the middle of the command stream also makes no sense.

Fixes: 5a5e9c0228 ("accel: Add Arm Ethos-U NPU driver")
Cc: stable@vger.kernel.org
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260827-ethosu-fixes-v1-3-346f9ea8791c@kernel.org
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>

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Rob Herring (Arm) 2026-08-27 15:33:02 -05:00

parent 2cbd369156

commit eb3a41fd35

2 changed files with 10 additions and 0 deletions

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1

drivers/accel/ethosu/ethosu_device.h

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9

drivers/accel/ethosu/ethosu_gem.c

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