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DIR:OUT; SFP:1102; x-ms-exchange-antispam-messagedata: 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 x-ms-exchange-transport-forked: True MIME-Version: 1.0 X-OriginatorOrg: renesas.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: TY2PR01MB3692.jpnprd01.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 18b3fa72-7c64-4f94-2254-08d85f9d44f8 X-MS-Exchange-CrossTenant-originalarrivaltime: 23 Sep 2020 08:47:14.2213 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 53d82571-da19-47e4-9cb4-625a166a4a2a X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: n49f2EA9kreUV3Qeb9pOFWVNnsSEgZNg4tncohVzEaW1fn3FHMzyfR/hbzgnsRBNt6FGu1l1xDZ70caTVi/IJ9NPFqY7aQfAF6nyum/KQfYaQSW1U/ublyEbal1TLm0h X-MS-Exchange-Transport-CrossTenantHeadersStamped: TY2PR01MB4506 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200923_044729_569167_E8252176 X-CRM114-Status: GOOD ( 20.28 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sumit Garg , Daniel Thompson , "linux-usb@vger.kernel.org" , Mathias Nyman , Arnd Bergmann , Mathias Nyman , Jann Horn , Greg Kroah-Hartman , Jason Yan , Chuhong Yuan , "Gustavo A. R. Silva" , "linux-kernel@vger.kernel.org" , Saurav Girepunje , "Ben Dooks \(Codethink\)" , "linux-mediatek@lists.infradead.org" , "Eric W. Biederman" , Matthias Brugger , Lee Jones , Sergei Shtylyov , "linux-arm-kernel@lists.infradead.org" , Felipe Balbi Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org Hi Chungeng, Thank you for the patch! > From: Chunfeng Yun, Sent: Monday, September 21, 2020 3:13 PM > > Use readl_poll_timeout_atomic() to simplify code > > Cc: Mathias Nyman > Cc: Yoshihiro Shimoda > Signed-off-by: Chunfeng Yun > --- > v4: changes > 1. remove unnecessary parentheses suggested by Yoshihiro > 2. fix the wrong return value suggested by Yoshihiro & Daniel > > v2~v3: no changes > --- > drivers/usb/host/xhci-rcar.c | 43 ++++++++++++------------------------------- > 1 file changed, 12 insertions(+), 31 deletions(-) > > diff --git a/drivers/usb/host/xhci-rcar.c b/drivers/usb/host/xhci-rcar.c > index c1025d3..1bc4fe7 100644 > --- a/drivers/usb/host/xhci-rcar.c > +++ b/drivers/usb/host/xhci-rcar.c > @@ -6,6 +6,7 @@ > */ > > #include > +#include > #include > #include > #include > @@ -127,8 +128,7 @@ static int xhci_rcar_download_firmware(struct usb_hcd *hcd) > void __iomem *regs = hcd->regs; > struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd); > const struct firmware *fw; > - int retval, index, j, time; > - int timeout = 10000; > + int retval, index, j; > u32 data, val, temp; > u32 quirks = 0; > const struct soc_device_attribute *attr; > @@ -166,32 +166,19 @@ static int xhci_rcar_download_firmware(struct usb_hcd *hcd) > temp |= RCAR_USB3_DL_CTRL_FW_SET_DATA0; > writel(temp, regs + RCAR_USB3_DL_CTRL); > > - for (time = 0; time < timeout; time++) { > - val = readl(regs + RCAR_USB3_DL_CTRL); > - if ((val & RCAR_USB3_DL_CTRL_FW_SET_DATA0) == 0) > - break; > - udelay(1); > - } > - if (time == timeout) { > - retval = -ETIMEDOUT; > + retval = readl_poll_timeout_atomic(regs + RCAR_USB3_DL_CTRL, > + val, !(val & RCAR_USB3_DL_CTRL_FW_SET_DATA0), > + 1, 10000); > + if (retval < 0) > break; > - } > } > > temp = readl(regs + RCAR_USB3_DL_CTRL); > temp &= ~RCAR_USB3_DL_CTRL_ENABLE; > writel(temp, regs + RCAR_USB3_DL_CTRL); > > - for (time = 0; time < timeout; time++) { > - val = readl(regs + RCAR_USB3_DL_CTRL); > - if (val & RCAR_USB3_DL_CTRL_FW_SUCCESS) { > - retval = 0; > - break; > - } > - udelay(1); > - } > - if (time == timeout) > - retval = -ETIMEDOUT; > + retval = readl_poll_timeout_atomic((regs + RCAR_USB3_DL_CTRL), We can also remove these unnecessary parentheses like below. + retval = readl_poll_timeout_atomic(regs + RCAR_USB3_DL_CTRL, After fixed this: Reviewed-by: Yoshihiro Shimoda Best regards, Yoshihiro Shimoda _______________________________________________ Linux-mediatek mailing list Linux-mediatek@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-mediatek