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[216.24.188.11]) by smtp.gmail.com with ESMTPSA id s25sm4830589pgv.70.2020.03.15.19.17.42 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Sun, 15 Mar 2020 19:17:42 -0700 (PDT) Date: Mon, 16 Mar 2020 10:17:40 +0800 From: Dejin Zheng To: Andrew Lunn Subject: Re: [PATCH net-next v2 1/2] net: stmmac: use readl_poll_timeout() function in init_systime() Message-ID: <20200316021740.GA3024@nuc8i5> References: <20200315150301.32129-1-zhengdejin5@gmail.com> <20200315150301.32129-2-zhengdejin5@gmail.com> <20200315182504.GA8524@lunn.ch> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200315182504.GA8524@lunn.ch> User-Agent: Mutt/1.9.4 (2018-02-28) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200315_191745_015027_F5D12A03 X-CRM114-Status: GOOD ( 19.36 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: alexandre.torgue@st.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, joabreu@synopsys.com, mcoquelin.stm32@gmail.com, peppe.cavallaro@st.com, davem@davemloft.net, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Sun, Mar 15, 2020 at 07:25:04PM +0100, Andrew Lunn wrote: Hi Andrew and David : > On Sun, Mar 15, 2020 at 11:03:00PM +0800, Dejin Zheng wrote: > > The init_systime() function use an open coded of readl_poll_timeout(). > > Replace the open coded handling with the proper function. > > > > Signed-off-by: Dejin Zheng > > --- > > v1 -> v2: > > - no changed. > > > > .../net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c | 14 ++++++-------- > > 1 file changed, 6 insertions(+), 8 deletions(-) > > > > diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c > > index 020159622559..2a24e2a7db3b 100644 > > --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c > > +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c > > @@ -10,6 +10,7 @@ > > *******************************************************************************/ > > > > #include > > +#include > > #include > > #include "common.h" > > #include "stmmac_ptp.h" > > @@ -53,8 +54,8 @@ static void config_sub_second_increment(void __iomem *ioaddr, > > > > static int init_systime(void __iomem *ioaddr, u32 sec, u32 nsec) > > { > > - int limit; > > u32 value; > > + int err; > > > > writel(sec, ioaddr + PTP_STSUR); > > writel(nsec, ioaddr + PTP_STNSUR); > > @@ -64,13 +65,10 @@ static int init_systime(void __iomem *ioaddr, u32 sec, u32 nsec) > > writel(value, ioaddr + PTP_TCR); > > > > /* wait for present system time initialize to complete */ > > - limit = 10; > > - while (limit--) { > > - if (!(readl(ioaddr + PTP_TCR) & PTP_TCR_TSINIT)) > > - break; > > - mdelay(10); > > - } > > - if (limit < 0) > > + err = readl_poll_timeout(ioaddr + PTP_TCR, value, > > + !(value & PTP_TCR_TSINIT), > > + 10000, 100000); > > + if (err) > > return -EBUSY; > > Hi Dejin > > It is normal to just return whatever error code readl_poll_timeout() > returned. > > Andrew You are right. I will modify it. Thanks! BR, Dejin _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel