Hi Dmitry, On 13.12.2019 02:24, Dmitry Torokhov wrote: > On Thu, Dec 12, 2019 at 12:12:36PM +0100, Marek Szyprowski wrote: >> On 08.11.2019 05:22, Dmitry Torokhov wrote: >>> We do not need a special flag to know if we are dealing with an array, >>> as we can get that data from ratio between element length and the data >>> size, however we do need a flag to know whether the data is stored >>> directly inside property_entry or separately. >>> >>> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx> >> Today I've noticed that this patch got merged to linux-next as commit >> e6bff4665c595b5a4aff173848851ed49ac3bfad. Sadly it breaks DWC3/xHCI >> driver operation on Samsung Exynos5 SoCs (and probably on other SoCs >> which use DWC3 in host mode too). I get the following errors during boot: >> >> dwc3 12000000.dwc3: failed to add properties to xHCI >> dwc3 12000000.dwc3: failed to initialize host >> dwc3: probe of 12000000.dwc3 failed with error -61 >> >> Here is a full kernel log from Exynos5250-based Snow Chromebook on KernelCI: >> >> https://protect2.fireeye.com/url?k=df93ba76-820d14ec-df923139-0cc47a336fae-f751d8b108bc5bdf&u=https://storage.kernelci.org/next/master/next-20191212/arm/exynos_defconfig/gcc-8/lab-collabora/boot-exynos5250-snow.txt >> >> (lack of 'ref' clk is not related nor fatal to the driver operation). >> >> The code which fails after this patch is located in >> drivers/usb/dwc3/host.c. Let me know if I can help more in locating the bug. > Does the following help? If, as I expect, it does, I'll submit it > formally. Yes, it fixes the issue. If possible, please add the following tags: Reported-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> Tested-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> to the final patch. > --- > > diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c > index 5567ed2cddbec..fa252870c926f 100644 > --- a/drivers/usb/dwc3/host.c > +++ b/drivers/usb/dwc3/host.c > @@ -88,10 +88,10 @@ int dwc3_host_init(struct dwc3 *dwc) > memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props)); > > if (dwc->usb3_lpm_capable) > - props[prop_idx++].name = "usb3-lpm-capable"; > + props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb3-lpm-capable"); > > if (dwc->usb2_lpm_disable) > - props[prop_idx++].name = "usb2-lpm-disable"; > + props[prop_idx++] = PROPERTY_ENTRY_BOOL("usb2-lpm-disable"); > > /** > * WORKAROUND: dwc3 revisions <=3.00a have a limitation > @@ -103,7 +103,7 @@ int dwc3_host_init(struct dwc3 *dwc) > * This following flag tells XHCI to do just that. > */ > if (dwc->revision <= DWC3_REVISION_300A) > - props[prop_idx++].name = "quirk-broken-port-ped"; > + props[prop_idx++] = PROPERTY_ENTRY_BOOL("quirk-broken-port-ped"); > > if (prop_idx) { > ret = platform_device_add_properties(xhci, props); > > Best regards -- Marek Szyprowski, PhD Samsung R&D Institute Poland
