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From: Helge Deller <deller@gmx.de>
To: linux-parisc@vger.kernel.org,
	James Bottomley <James.Bottomley@hansenpartnership.com>,
	John David Anglin <dave.anglin@bell.net>
Subject: [PATCH] parisc: Improve error return codes when setting rtc time
Date: Sat, 17 Oct 2020 20:13:06 +0200	[thread overview]
Message-ID: <20201017181306.GA12903@ls3530.fritz.box> (raw)

The HP 730 machine returned strange errors when I tried setting the rtc
time.  Add some debug code to improve the possibility to trace errors
and document that hppa probably has as Y2k38 problem.

Signed-off-by: Helge Deller <deller@gmx.de>

diff --git a/arch/parisc/kernel/time.c b/arch/parisc/kernel/time.c
index 04508158815c..13d94f0f94a0 100644
--- a/arch/parisc/kernel/time.c
+++ b/arch/parisc/kernel/time.c
@@ -180,9 +180,16 @@ static int rtc_generic_get_time(struct device *dev, struct rtc_time *tm)
 static int rtc_generic_set_time(struct device *dev, struct rtc_time *tm)
 {
 	time64_t secs = rtc_tm_to_time64(tm);
-
-	if (pdc_tod_set(secs, 0) < 0)
+	int ret;
+
+	/* hppa has Y2K38 problem: pdc_tod_set() takes an u32 value! */
+	ret = pdc_tod_set(secs, 0);
+	if (ret != 0) {
+		pr_warn("pdc_tod_set(%lld) returned error %d\n", secs, ret);
+		if (ret == PDC_INVALID_ARG)
+			return -EINVAL;
 		return -EOPNOTSUPP;
+	}

 	return 0;
 }

                 reply	other threads:[~2020-10-17 18:13 UTC|newest]

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