spi: spi-zynq-qspi: Fix stack violation bug

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[ Upstream commit 6d5ff8e632 ]

When the number of bytes for the op is greater than one, the read could
run off the end of the function stack and cause a crash.

This patch restores the behaviour of safely reading out of the original
opcode location.

Signed-off-by: Karen Dombroski <karen.dombroski@marsbioimaging.com>
Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@xilinx.com>
Link: https://lore.kernel.org/r/20210429053802.17650-3-amit.kumar-mahapatra@xilinx.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Karen Dombroski 2021-04-28 23:38:02 -06:00 • committed by Greg Kroah-Hartman

parent 4b8b7bc3a7

commit fb91ab403e

1 changed files with 3 additions and 4 deletions

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drivers/spi/spi-zynq-qspi.c

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