serial: sc16is7xx: declare SPR/TLR/XOFF2 register as volatile

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SPR shares the same address space as TLR and XOFF2. If SPR or TLR were to
be used eventually, this could lead to incorrect read value from the cache.

Prevent this potential bug by declaring SPR/TLR/XOFF2 as volatile.

Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
Link: https://patch.msgid.link/20251027142957.1032073-8-hugo@hugovil.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Hugo Villeneuve 2025-10-27 10:29:49 -04:00 • committed by Greg Kroah-Hartman

parent e0925b4a04

commit 983f91e5f1

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drivers/tty/serial/sc16is7xx.c

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