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charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230710_220755_169139_B0CEB3D4 X-CRM114-Status: GOOD ( 27.13 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org On 05-07-23, 12:00, AngeloGioacchino Del Regno wrote: > Il 05/07/23 11:30, Yangtao Li ha scritto: > > HI AngeloGioacchino, > > > > On 2023/7/5 17:22, AngeloGioacchino Del Regno wrote: > > > Il 05/07/23 11:01, Yangtao Li ha scritto: > > > > Use devm_platform_ioremap_resource() to simplify code. > > > > > > > > Signed-off-by: Yangtao Li > > > > --- > > > >   drivers/phy/mediatek/phy-mtk-tphy.c | 10 +++------- > > > >   1 file changed, 3 insertions(+), 7 deletions(-) > > > > > > > > diff --git a/drivers/phy/mediatek/phy-mtk-tphy.c > > > > b/drivers/phy/mediatek/phy-mtk-tphy.c > > > > index 0d110e50bbfd..cb7a4e6ea017 100644 > > > > --- a/drivers/phy/mediatek/phy-mtk-tphy.c > > > > +++ b/drivers/phy/mediatek/phy-mtk-tphy.c > > > > @@ -1554,7 +1554,6 @@ static int mtk_tphy_probe(struct platform_device *pdev) > > > >       struct device_node *np = dev->of_node; > > > >       struct device_node *child_np; > > > >       struct phy_provider *provider; > > > > -    struct resource *sif_res; > > > >       struct mtk_tphy *tphy; > > > >       struct resource res; > > > >       int port, retval; > > > > @@ -1576,15 +1575,12 @@ static int mtk_tphy_probe(struct platform_device *pdev) > > > >       tphy->dev = dev; > > > >       platform_set_drvdata(pdev, tphy); > > > >   -    sif_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > > > >       /* SATA phy of V1 needn't it if not shared with PCIe or USB */ > > > > -    if (sif_res && tphy->pdata->version == MTK_PHY_V1) { > > > > +    if (tphy->pdata->version == MTK_PHY_V1) { > > > >           /* get banks shared by multiple phys */ > > > > -        tphy->sif_base = devm_ioremap_resource(dev, sif_res); > > > > -        if (IS_ERR(tphy->sif_base)) { > > > > -            dev_err(dev, "failed to remap sif regs\n"); > > > > +        tphy->sif_base = devm_platform_ioremap_resource(pdev, 0); > > > > +        if (IS_ERR(tphy->sif_base) && PTR_ERR(tphy->sif_base) != -EINVAL) > > > > > > That's wrong. You want to return any error unconditionally, as the V1 PHY *needs* > > > the sif iospace and there's nothing afterwards retrying this. > > > > > > When sif_res is not configured, an IOMEM_ERR_PTR(-EINVAL) error will be > > returned in __devm_ioremap_resource. > > > > This kind of error is ignored in the newly added code, and the driving > > probe process will not be interrupted at this time. > > > > What did I miss? > > > > As I said, MTK_PHY_V1 *needs* sif; devm_platform_ioremap_resource() returns a > handle to that iospace, or error. > > tphy->sif_base = devm_platform_ioremap_resource(pdev, 0); > if (IS_ERR(tphy->sif_base)) > return PTR_ERR(tphy->sif_base); That does sound right to me -- ~Vinod