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| author |  Mario Limonciello <mario.limonciello@amd.com>
| 2023-11-27 23:36:52 -0600 |
|---|---|---|
| committer |  Alexandre Belloni <alexandre.belloni@bootlin.com>
| 2023-12-17 22:33:55 +0100 |
| commit | 120931db07b49252aba2073096b595482d71857c (patch) | |
| tree | 8e36f94ece5cf7ac211dcf830c2ad66bbc33dcb0 /arch/alpha | |
| parent | rtc: Adjust failure return code for cmos_set_alarm() (diff) | |
| download | linux-120931db07b49252aba2073096b595482d71857c.tar.gz linux-120931db07b49252aba2073096b595482d71857c.tar.bz2 linux-120931db07b49252aba2073096b595482d71857c.zip | |
rtc: Add support for configuring the UIP timeout for RTC reads
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: ec5895c0f2d8 ("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>
Diffstat (limited to 'arch/alpha')
| -rw-r--r-- | arch/alpha/kernel/rtc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/alpha/kernel/rtc.c b/arch/alpha/kernel/rtc.c index fb3025396ac9..cfdf90bc8b3f 100644 --- a/arch/alpha/kernel/rtc.c +++ b/arch/alpha/kernel/rtc.c @@ -80,7 +80,7 @@ init_rtc_epoch(void) static int alpha_rtc_read_time(struct device *dev, struct rtc_time *tm) { - int ret = mc146818_get_time(tm); + int ret = mc146818_get_time(tm, 10); if (ret < 0) { dev_err_ratelimited(dev, "unable to read current time\n"); |