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Mario Limonciello 7971389316 rtc: Add support for configuring the UIP timeout for RTC reads 
commit 120931db07b49252aba2073096b595482d71857c upstream.

The UIP timeout is hardcoded to 10ms for all RTC reads, but in some
contexts this might not be enough time. Add a timeout parameter to
mc146818_get_time() and mc146818_get_time_callback().

If UIP timeout is configured by caller to be >=100 ms and a call
takes this long, log a warning.

Make all callers use 10ms to ensure no functional changes.

Cc:  <stable@vger.kernel.org> # 6.1.y
Fixes: ec5895c0f2 ("rtc: mc146818-lib: extract mc146818_avoid_UIP")
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Tested-by: Mateusz Jończyk <mat.jonczyk@o2.pl>
Reviewed-by: Mateusz Jończyk <mat.jonczyk@o2.pl>
Acked-by: Mateusz Jończyk <mat.jonczyk@o2.pl>
Link: https://lore.kernel.org/r/20231128053653.101798-4-mario.limonciello@amd.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-01-31 16:17:01 -08:00
..
boot alpha/boot/tools/objstrip: fix the check for ELF header 2023-03-10 09:33:30 +01:00
configs treewide: defconfig: address renamed CONFIG_DEBUG_INFO=y 2022-09-11 21:55:05 -07:00
include init: Remove check_bugs() leftovers 2023-08-08 20:03:47 +02:00
kernel rtc: Add support for configuring the UIP timeout for RTC reads 2024-01-31 16:17:01 -08:00
lib
math-emu
mm mm/fault: convert remaining simple cases to lock_mm_and_find_vma() 2023-07-01 13:16:25 +02:00
Kbuild
Kconfig mm/fault: convert remaining simple cases to lock_mm_and_find_vma() 2023-07-01 13:16:25 +02:00
Kconfig.debug
Makefile kbuild: remove head-y syntax 2022-10-02 18:06:03 +09:00