linux-kernel - Re: [PATCH v8 1/6] software node: rename is_array to is

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Date:   Thu, 12 Dec 2019 17:24:08 -0800
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Marek Szyprowski <m.szyprowski@...sung.com>
Cc:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
        platform-driver-x86@...r.kernel.org,
        'Linux Samsung SOC' <linux-samsung-soc@...r.kernel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Felipe Balbi <balbi@...nel.org>,
        Linux USB Mailing List <linux-usb@...r.kernel.org>
Subject: Re: [PATCH v8 1/6] software node: rename is_array to is_inline

Hi Marek,

On Thu, Dec 12, 2019 at 12:12:36PM +0100, Marek Szyprowski wrote:
> Dear All,
> 
> 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@...il.com>
> 
> 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://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.

---

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);


-- 
Dmitry