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Wed, 19 Aug 2020 21:47:20 -0800 Received: from MTKMBS31N2.mediatek.inc (172.27.4.87) by MTKMBS62N1.mediatek.inc (172.29.193.41) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 19 Aug 2020 22:47:19 -0700 Received: from mtkcas08.mediatek.inc (172.21.101.126) by MTKMBS31N2.mediatek.inc (172.27.4.87) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 20 Aug 2020 13:47:16 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas08.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Thu, 20 Aug 2020 13:47:14 +0800 From: Chunfeng Yun To: Greg Kroah-Hartman Subject: [PATCH v2 07/11] usb: isp1760-hcd: convert to readl_poll_timeout_atomic() Date: Thu, 20 Aug 2020 13:45:45 +0800 Message-ID: <1597902349-8998-7-git-send-email-chunfeng.yun@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty In-Reply-To: <1597902349-8998-1-git-send-email-chunfeng.yun@mediatek.com> References: <1597902349-8998-1-git-send-email-chunfeng.yun@mediatek.com> MIME-Version: 1.0 X-TM-SNTS-SMTP: 85ABC731EDF3EF1F9BCD8FAEAA27DDA5881E5D28068DA5B9B742E90875CA65AA2000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200820_014725_990683_B75C4A13 X-CRM114-Status: GOOD ( 15.15 ) 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: Felipe Balbi , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Chunfeng Yun , linux-mediatek@lists.infradead.org, Matthias Brugger , Lee Jones , 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+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Use readl_poll_timeout_atomic() to simplify code Signed-off-by: Chunfeng Yun --- v2: no changes --- drivers/usb/isp1760/isp1760-hcd.c | 20 +++++++++----------- 1 file changed, 9 insertions(+), 11 deletions(-) diff --git a/drivers/usb/isp1760/isp1760-hcd.c b/drivers/usb/isp1760/isp1760-hcd.c index dd74ab7a..33ae656 100644 --- a/drivers/usb/isp1760/isp1760-hcd.c +++ b/drivers/usb/isp1760/isp1760-hcd.c @@ -22,6 +22,7 @@ #include #include #include +#include #include #include #include @@ -380,18 +381,15 @@ static int handshake(struct usb_hcd *hcd, u32 reg, u32 mask, u32 done, int usec) { u32 result; + int ret; + + ret = readl_poll_timeout_atomic(hcd->regs + reg, result, + ((result & mask) == done || + result == U32_MAX), 1, usec); + if (result == U32_MAX) + return -ENODEV; - do { - result = reg_read32(hcd->regs, reg); - if (result == ~0) - return -ENODEV; - result &= mask; - if (result == done) - return 0; - udelay(1); - usec--; - } while (usec > 0); - return -ETIMEDOUT; + return ret; } /* reset a non-running (STS_HALT == 1) controller */ -- 1.9.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel