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To:     "Alice Guo (OSS)" <alice.guo@oss.nxp.com>,
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References: <20210419042722.27554-1-alice.guo@oss.nxp.com>
 <20210419042722.27554-4-alice.guo@oss.nxp.com>
From:   =?UTF-8?Q?P=c3=a9ter_Ujfalusi?= <peter.ujfalusi@gmail.com>
Subject: Re: [RFC v1 PATCH 3/3] driver: update all the code that use
 soc_device_match
Message-ID: <2924b8af-d176-01b1-a221-5219c1128494@gmail.com>
Date:   Tue, 20 Apr 2021 12:40:13 +0300
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Hi Alice,

On 4/19/21 7:27 AM, Alice Guo (OSS) wrote:
> From: Alice Guo <alice.guo@nxp.com>
> 
> Update all the code that use soc_device_match because add support for
> soc_device_match returning -EPROBE_DEFER.
> 
> Signed-off-by: Alice Guo <alice.guo@nxp.com>
> ---
>  drivers/bus/ti-sysc.c                         |  2 +-
>  drivers/clk/renesas/r8a7795-cpg-mssr.c        |  4 +++-
>  drivers/clk/renesas/rcar-gen2-cpg.c           |  2 +-
>  drivers/clk/renesas/rcar-gen3-cpg.c           |  2 +-
>  drivers/dma/fsl-dpaa2-qdma/dpaa2-qdma.c       |  7 ++++++-
>  drivers/dma/ti/k3-psil.c                      |  3 +++
>  drivers/dma/ti/k3-udma.c                      |  2 +-
>  drivers/gpu/drm/bridge/nwl-dsi.c              |  2 +-
>  drivers/gpu/drm/meson/meson_drv.c             |  4 +++-
>  drivers/gpu/drm/omapdrm/dss/dispc.c           |  2 +-
>  drivers/gpu/drm/omapdrm/dss/dpi.c             |  4 +++-
>  drivers/gpu/drm/omapdrm/dss/dsi.c             |  3 +++
>  drivers/gpu/drm/omapdrm/dss/dss.c             |  3 +++
>  drivers/gpu/drm/omapdrm/dss/hdmi4_core.c      |  3 +++
>  drivers/gpu/drm/omapdrm/dss/venc.c            |  4 +++-
>  drivers/gpu/drm/omapdrm/omap_drv.c            |  3 +++
>  drivers/gpu/drm/rcar-du/rcar_du_crtc.c        |  4 +++-
>  drivers/gpu/drm/rcar-du/rcar_lvds.c           |  2 +-
>  drivers/gpu/drm/tidss/tidss_dispc.c           |  4 +++-
>  drivers/iommu/ipmmu-vmsa.c                    |  7 +++++--
>  drivers/media/platform/rcar-vin/rcar-core.c   |  2 +-
>  drivers/media/platform/rcar-vin/rcar-csi2.c   |  2 +-
>  drivers/media/platform/vsp1/vsp1_uif.c        |  4 +++-
>  drivers/mmc/host/renesas_sdhi_core.c          |  2 +-
>  drivers/mmc/host/renesas_sdhi_internal_dmac.c |  2 +-
>  drivers/mmc/host/sdhci-of-esdhc.c             | 21 ++++++++++++++-----
>  drivers/mmc/host/sdhci-omap.c                 |  2 +-
>  drivers/mmc/host/sdhci_am654.c                |  2 +-
>  drivers/net/ethernet/renesas/ravb_main.c      |  4 +++-
>  drivers/net/ethernet/ti/am65-cpsw-nuss.c      |  2 +-
>  drivers/net/ethernet/ti/cpsw.c                |  2 +-
>  drivers/net/ethernet/ti/cpsw_new.c            |  2 +-
>  drivers/phy/ti/phy-omap-usb2.c                |  4 +++-
>  drivers/pinctrl/renesas/core.c                |  2 +-
>  drivers/pinctrl/renesas/pfc-r8a7790.c         |  5 ++++-
>  drivers/pinctrl/renesas/pfc-r8a7794.c         |  5 ++++-
>  drivers/soc/fsl/dpio/dpio-driver.c            | 13 ++++++++----
>  drivers/soc/renesas/r8a774c0-sysc.c           |  5 ++++-
>  drivers/soc/renesas/r8a7795-sysc.c            |  2 +-
>  drivers/soc/renesas/r8a77990-sysc.c           |  5 ++++-
>  drivers/soc/ti/k3-ringacc.c                   |  2 +-
>  drivers/staging/mt7621-pci/pci-mt7621.c       |  2 +-
>  drivers/thermal/rcar_gen3_thermal.c           |  4 +++-
>  drivers/thermal/ti-soc-thermal/ti-bandgap.c   | 10 +++++++--
>  drivers/usb/gadget/udc/renesas_usb3.c         |  2 +-
>  drivers/usb/host/ehci-platform.c              |  4 +++-
>  drivers/usb/host/xhci-rcar.c                  |  2 +-
>  drivers/watchdog/renesas_wdt.c                |  2 +-
>  48 files changed, 131 insertions(+), 52 deletions(-)
> 

...

> diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
> index 96ad21869ba7..50a4c8f0993d 100644
> --- a/drivers/dma/ti/k3-udma.c
> +++ b/drivers/dma/ti/k3-udma.c
> @@ -5188,7 +5188,7 @@ static int udma_probe(struct platform_device *pdev)
>  	ud->match_data = match->data;
>  
>  	soc = soc_device_match(k3_soc_devices);
> -	if (!soc) {
> +	if (!IS_ERR(soc) && !soc) {

this does not sound right...

if (!soc || IS_ERR(soc))
or
if (IS_ERR_OR_NULL(soc))
is even better.

>  		dev_err(dev, "No compatible SoC found\n");
>  		return -ENODEV;

There might be a clever macro for it, but:

return soc ? PTR_ERR(soc) : -ENODEV;

>  	}

-- 
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