serial: tegra: protect IER against LCR.DLAB

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The IER and DLH registers occupy the same address space, selected by
the LCR.DLAB bit. Hence, add port lock to protect IER when LCR.DLAB bit
is set.

Signed-off-by: Ahung Cheng <ahcheng@nvidia.com>
Signed-off-by: Krishna Yarlagadda <kyarlagadda@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/1565609303-27000-5-git-send-email-kyarlagadda@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Ahung Cheng 2019-08-12 16:58:13 +05:30 • committed by Greg Kroah-Hartman

parent 6300b140c2

commit 18a4c404d2

1 changed files with 3 additions and 0 deletions

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drivers/tty/serial/serial-tegra.c

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