From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Subject: [v2,1/6] usb: xhci-mtk: get optional clock by devm_clk_get_optional() From: Chunfeng Yun Message-Id: <1555480408.10179.202.camel@mhfsdcap03> Date: Wed, 17 Apr 2019 13:53:28 +0800 To: Greg Kroah-Hartman Cc: Mathias Nyman , Matthias Brugger , Marek Szyprowski , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org List-ID: T24gVHVlLCAyMDE5LTA0LTE2IGF0IDEyOjEyICswMjAwLCBHcmVnIEtyb2FoLUhhcnRtYW4gd3Jv dGU6Cj4gT24gV2VkLCBBcHIgMTAsIDIwMTkgYXQgMDI6NDc6MjRQTSArMDgwMCwgQ2h1bmZlbmcg WXVuIHdyb3RlOgo+ID4gVXNlIGRldm1fY2xrX2dldF9vcHRpb25hbCgpIHRvIGdldCBvcHRpb25h bCBjbG9jawo+ID4gCj4gPiBTaWduZWQtb2ZmLWJ5OiBDaHVuZmVuZyBZdW4gPGNodW5mZW5nLnl1 bkBtZWRpYXRlay5jb20+Cj4gPiAtLS0KPiA+IHYyOiBubyBjaGFuZ2VzCj4gPiAtLS0KPiA+ICBk cml2ZXJzL3VzYi9ob3N0L3hoY2ktbXRrLmMgfCAxOSArKystLS0tLS0tLS0tLS0tLS0tCj4gPiAg MSBmaWxlIGNoYW5nZWQsIDMgaW5zZXJ0aW9ucygrKSwgMTYgZGVsZXRpb25zKC0pCj4gPiAKPiA+ IGRpZmYgLS1naXQgYS9kcml2ZXJzL3VzYi9ob3N0L3hoY2ktbXRrLmMgYi9kcml2ZXJzL3VzYi9o b3N0L3hoY2ktbXRrLmMKPiA+IGluZGV4IDYwOTg3Yzc4N2U0NC4uMDI2ZmUxODk3MmQzIDEwMDY0 NAo+ID4gLS0tIGEvZHJpdmVycy91c2IvaG9zdC94aGNpLW10ay5jCj4gPiArKysgYi9kcml2ZXJz L3VzYi9ob3N0L3hoY2ktbXRrLmMKPiA+IEBAIC0yMDYsMTkgKzIwNiw2IEBAIHN0YXRpYyBpbnQg eGhjaV9tdGtfc3N1c2JfY29uZmlnKHN0cnVjdCB4aGNpX2hjZF9tdGsgKm10aykKPiA+ICAJcmV0 dXJuIHhoY2lfbXRrX2hvc3RfZW5hYmxlKG10ayk7Cj4gPiAgfQo+ID4gIAo+ID4gLS8qIGlnbm9y ZSB0aGUgZXJyb3IgaWYgdGhlIGNsb2NrIGRvZXMgbm90IGV4aXN0ICovCj4gPiAtc3RhdGljIHN0 cnVjdCBjbGsgKm9wdGlvbmFsX2Nsa19nZXQoc3RydWN0IGRldmljZSAqZGV2LCBjb25zdCBjaGFy ICppZCkKPiA+IC17Cj4gPiAtCXN0cnVjdCBjbGsgKm9wdF9jbGs7Cj4gPiAtCj4gPiAtCW9wdF9j bGsgPSBkZXZtX2Nsa19nZXQoZGV2LCBpZCk7Cj4gPiAtCS8qIGlnbm9yZSBlcnJvciBudW1iZXIg ZXhjZXB0IEVQUk9CRV9ERUZFUiAqLwo+ID4gLQlpZiAoSVNfRVJSKG9wdF9jbGspICYmIChQVFJf RVJSKG9wdF9jbGspICE9IC1FUFJPQkVfREVGRVIpKQo+IAo+IEFyZSB5b3Ugc3VyZSBhYm91dCB0 aGlzPwo+IAo+IGRldm1fY2xrX2dldF9vcHRpb25hbCgpIGRvZXMgbm90IGNoZWNrIGZvciAtRVBS T0JFX0RFRkVSLCBzbyB5b3UganVzdAo+IGNoYW5nZWQgdGhlIGZ1bmN0aW9uYWxpdHkgb2YgdGhp cyBjb2RlLiAgSXMgdGhhdCBvaz8gIApZZXMsIGNoZWNraW5nIGZvciAtRU5PRU5UIGNvdmVycyBt b3JlIGVycm9yIGNhc2VzIHRoYW4gLUVQUk9CRV9ERUZFUiwKYW5kIHRoZSBvcmlnaW5hbCBwdXJw b3NlIGFsc28gd2FudHMgdG8gaWdub3JlIG5vbi1leGlzdCBjbG9jawoKPiBJZiBzbywgcGxlYXNl IGNhbGwKPiBpdCBvdXQgZXhwbGljaXRseSBpbiB5b3VyIGNoYW5nZWxvZyBjb21tZW50IHdoZW4g eW91IHJlc2VuZCB0aGlzLgpJJ2xsIGFkZCBpdCBpbiBuZXh0IHZlcnNpb24KClRoYW5rcyBhIGxv dAoKPiAKPiB0aGFua3MsCj4gCj4gZ3JlZyBrLWgK From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,UNPARSEABLE_RELAY, URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4E38DC282DA for ; 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Wed, 17 Apr 2019 13:53:28 +0800 Message-ID: <1555480408.10179.202.camel@mhfsdcap03> Subject: Re: [v2 PATCH 1/6] usb: xhci-mtk: get optional clock by devm_clk_get_optional() From: Chunfeng Yun To: Greg Kroah-Hartman CC: Mathias Nyman , Matthias Brugger , Marek Szyprowski , , , , Date: Wed, 17 Apr 2019 13:53:28 +0800 In-Reply-To: <20190416101258.GA26091@kroah.com> References: <20190416101258.GA26091@kroah.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3-0ubuntu6 Content-Transfer-Encoding: 7bit MIME-Version: 1.0 X-TM-SNTS-SMTP: B869C67EFBC31644559755DF4053266ADFB8265FFA9401318A6355018D3BCD072000:8 X-MTK: N Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Message-ID: <20190417055328.aBmIuqcf5H5O7NZKnIOQuzji6ibsJx1Vt6mF8_UitRk@z> On Tue, 2019-04-16 at 12:12 +0200, Greg Kroah-Hartman wrote: > On Wed, Apr 10, 2019 at 02:47:24PM +0800, Chunfeng Yun wrote: > > Use devm_clk_get_optional() to get optional clock > > > > Signed-off-by: Chunfeng Yun > > --- > > v2: no changes > > --- > > drivers/usb/host/xhci-mtk.c | 19 +++---------------- > > 1 file changed, 3 insertions(+), 16 deletions(-) > > > > diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c > > index 60987c787e44..026fe18972d3 100644 > > --- a/drivers/usb/host/xhci-mtk.c > > +++ b/drivers/usb/host/xhci-mtk.c > > @@ -206,19 +206,6 @@ static int xhci_mtk_ssusb_config(struct xhci_hcd_mtk *mtk) > > return xhci_mtk_host_enable(mtk); > > } > > > > -/* ignore the error if the clock does not exist */ > > -static struct clk *optional_clk_get(struct device *dev, const char *id) > > -{ > > - struct clk *opt_clk; > > - > > - opt_clk = devm_clk_get(dev, id); > > - /* ignore error number except EPROBE_DEFER */ > > - if (IS_ERR(opt_clk) && (PTR_ERR(opt_clk) != -EPROBE_DEFER)) > > Are you sure about this? > > devm_clk_get_optional() does not check for -EPROBE_DEFER, so you just > changed the functionality of this code. Is that ok? Yes, checking for -ENOENT covers more error cases than -EPROBE_DEFER, and the original purpose also wants to ignore non-exist clock > If so, please call > it out explicitly in your changelog comment when you resend this. I'll add it in next version Thanks a lot > > thanks, > > greg k-h