From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ozlabs.org (ozlabs.org [103.22.144.67]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 8D2AE1A003F for ; Tue, 19 Aug 2014 14:48:05 +1000 (EST) From: Michael Neuling To: Benjamin Herrenschmidt , Michael Ellerman Subject: [PATCH 2/4] powerpc/powernv: Check OPAL RTC calls exists before using Date: Tue, 19 Aug 2014 14:48:00 +1000 Message-Id: <1408423682-14297-2-git-send-email-mikey@neuling.org> In-Reply-To: <1408423682-14297-1-git-send-email-mikey@neuling.org> References: <1408423682-14297-1-git-send-email-mikey@neuling.org> Cc: Stewart Smith , linuxppc-dev@lists.ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Check that the OPAL_RTC_READ token exists before we use the OPAL RTC. Refactors the code a little to merge error paths. This avoids littering the OPAL console with: "OPAL: Called with bad token 3". Signed-off-by: Michael Neuling --- arch/powerpc/platforms/powernv/opal-rtc.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/arch/powerpc/platforms/powernv/opal-rtc.c b/arch/powerpc/platforms/powernv/opal-rtc.c index b1885db..499707d 100644 --- a/arch/powerpc/platforms/powernv/opal-rtc.c +++ b/arch/powerpc/platforms/powernv/opal-rtc.c @@ -42,6 +42,9 @@ unsigned long __init opal_get_boot_time(void) __be64 __h_m_s_ms; long rc = OPAL_BUSY; + if (!opal_check_token(OPAL_RTC_READ)) + goto out; + while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) { rc = opal_rtc_read(&__y_m_d, &__h_m_s_ms); if (rc == OPAL_BUSY_EVENT) @@ -49,16 +52,18 @@ unsigned long __init opal_get_boot_time(void) else mdelay(10); } - if (rc != OPAL_SUCCESS) { - ppc_md.get_rtc_time = NULL; - ppc_md.set_rtc_time = NULL; - return 0; - } + if (rc != OPAL_SUCCESS) + goto out; + y_m_d = be32_to_cpu(__y_m_d); h_m_s_ms = be64_to_cpu(__h_m_s_ms); opal_to_tm(y_m_d, h_m_s_ms, &tm); return mktime(tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec); +out: + ppc_md.get_rtc_time = NULL; + ppc_md.set_rtc_time = NULL; + return 0; } void opal_get_rtc_time(struct rtc_time *tm) -- 1.9.1