Messages in this thread Patch in this message | | | Subject | Re: [PATCH v4 1/2] drivers: move the early platform device support to arch/sh | From | Guenter Roeck <> | Date | Mon, 2 Dec 2019 21:24:49 -0800 |
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On 12/2/19 9:18 AM, Bartosz Golaszewski wrote: > pon., 2 gru 2019 o 14:03 Guenter Roeck <linux@roeck-us.net> napisał(a): >> >> On 12/1/19 11:40 PM, Bartosz Golaszewski wrote: >>> pon., 2 gru 2019 o 05:14 Guenter Roeck <linux@roeck-us.net> napisał(a): >>>> >>>> On Thu, Oct 03, 2019 at 11:29:12AM +0200, Bartosz Golaszewski wrote: >>>>> From: Bartosz Golaszewski <bgolaszewski@baylibre.com> >>>>> >>>>> SuperH is the only user of the current implementation of early platform >>>>> device support. We want to introduce a more robust approach to early >>>>> probing. As the first step - move all the current early platform code >>>>> to arch/sh. >>>>> >>>>> In order not to export internal drivers/base functions to arch code for >>>>> this temporary solution - copy the two needed routines for driver >>>>> matching from drivers/base/platform.c to arch/sh/drivers/platform_early.c. >>>>> >>>>> Also: call early_platform_cleanup() from subsys_initcall() so that it's >>>>> called after all early devices are probed. >>>>> >>>>> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> >>>> >>>> Wondering ... has anyone tested this patch on affected hardware ? >>>> All my qemu boot tests (both sh and sheb) fail because of it. >>>> Bisect log below. >>>> >>>> Guenter >>>> >>>> --- >>>> # bad: [72c0870e3a05d9cd5466d08c3d2a3069ed0a2f9f] Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input >>>> # good: [89d57dddd7d319ded00415790a0bb3c954b7e386] Merge tag 'media/v5.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media >>>> git bisect start 'HEAD' '89d57dddd7d3' >>>> # good: [0a6cad5df541108cfd3fbd79eef48eb824c89bdc] Merge branch 'vmwgfx-coherent' of git://people.freedesktop.org/~thomash/linux into drm-next >>>> git bisect good 0a6cad5df541108cfd3fbd79eef48eb824c89bdc >>>> # bad: [9a3d7fd275be4559277667228902824165153c80] Merge tag 'driver-core-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core >>>> git bisect bad 9a3d7fd275be4559277667228902824165153c80 >>>> # good: [59274c7164807d27b24e6c068dfe734f7bea4623] Merge tag 'usb-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb >>>> git bisect good 59274c7164807d27b24e6c068dfe734f7bea4623 >>>> # good: [e71903106721dc53923e90aa484d78bc86c039a9] staging: mt7621-dma: align to match open parenthesis >>>> git bisect good e71903106721dc53923e90aa484d78bc86c039a9 >>>> # good: [8f56e4ebe05c26c30e167519273843476e39e244] Merge tag 'char-misc-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc >>>> git bisect good 8f56e4ebe05c26c30e167519273843476e39e244 >>>> # good: [8bde9f3d2a217d1635a7c7bdf8ad4c25c9a34b50] Merge tag 'iio-for-5.5c' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next >>>> git bisect good 8bde9f3d2a217d1635a7c7bdf8ad4c25c9a34b50 >>>> # bad: [0628cda318df6baec439ca6e6e274007492f1ccd] mac80211: Use debugfs_create_xul() helper >>>> git bisect bad 0628cda318df6baec439ca6e6e274007492f1ccd >>>> # bad: [03324507e66c7664c754b1ef92c5c3be24c78aa2] driver core: Allow fwnode_operations.add_links to differentiate errors >>>> git bisect bad 03324507e66c7664c754b1ef92c5c3be24c78aa2 >>>> # bad: [313f5dbba41d905d59c820bb2d91ee6c661aff99] debugfs: remove return value of debugfs_create_u16() >>>> git bisect bad 313f5dbba41d905d59c820bb2d91ee6c661aff99 >>>> # good: [d4387cd117414ba80230f27a514be5ca4a09cfcc] of: property: Create device links for all child-supplier depencencies >>>> git bisect good d4387cd117414ba80230f27a514be5ca4a09cfcc >>>> # bad: [c31e73121f4c1ec45a3e523ac6ce3ce6dafdcec1] base: soc: Handle custom soc information sysfs entries >>>> git bisect bad c31e73121f4c1ec45a3e523ac6ce3ce6dafdcec1 >>>> # bad: [201e91091b1d47047f55580b5474e1239f4d17aa] sh: add the sh_ prefix to early platform symbols >>>> git bisect bad 201e91091b1d47047f55580b5474e1239f4d17aa >>>> # bad: [507fd01d5333338753a1cc26322dfc9f856c109f] drivers: move the early platform device support to arch/sh >>>> git bisect bad 507fd01d5333338753a1cc26322dfc9f856c109f >>>> # first bad commit: [507fd01d5333338753a1cc26322dfc9f856c109f] drivers: move the early platform device support to arch/sh >>> >>> Hi Guenter, >>> >>> can you post some bootlogs? Is it the same problem everywhere? >>> >> >> I don't have any useful logs. The boot fails too early for that. >> > > Yeah, it touched "early" devices after all... > >> Sorry, I don't understand "everywhere". It fails in mainline and -next, if that is what you mean. > > I referred to "All my qemu boot tests" when saying everywhere. > > I don't have any relevant HW - the idea for this patch is to stop > compiling for everyone a bunch of code that's only used by one largely > irrelevant architecture and free the namespace for a generic early > platform drivers implementation. > > How are you creating your SH qemu images? I'm seeing there's something > in buildroot for superh - maybe I'll be able to bearly_platform_cleanupuild something > useful. >
Below is a possible fix. As I had suspected, the call to early_platform_cleanup() is in the wrong place.
Guenter
--- arch/sh/drivers/platform_early.c | 11 ++--------- drivers/base/platform.c | 4 ++++ 2 files changed, 6 insertions(+), 9 deletions(-)
diff --git a/arch/sh/drivers/platform_early.c b/arch/sh/drivers/platform_early.c index f6d148451dfc..16f33bffd8fc 100644 --- a/arch/sh/drivers/platform_early.c +++ b/arch/sh/drivers/platform_early.c @@ -325,9 +325,9 @@ int __init sh_early_platform_driver_probe(char *class_str, }
/** - * sh_early_platform_cleanup - clean up early platform code + * early_platform_cleanup - clean up early platform code */ -static int __init sh_early_platform_cleanup(void) +void early_platform_cleanup(void) { struct platform_device *pd, *pd2;
@@ -337,11 +337,4 @@ static int __init sh_early_platform_cleanup(void) list_del(&pd->dev.devres_head); memset(&pd->dev.devres_head, 0, sizeof(pd->dev.devres_head)); } - - return 0; } -/* - * This must happen once after all early devices are probed but before probing - * real platform devices. - */ -subsys_initcall(sh_early_platform_cleanup); diff --git a/drivers/base/platform.c b/drivers/base/platform.c index 7c532548b0a6..3ba153e356ee 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -1325,10 +1325,14 @@ struct device *platform_find_device_by_driver(struct device *start, } EXPORT_SYMBOL_GPL(platform_find_device_by_driver);
+void __weak early_platform_cleanup(void) { } + int __init platform_bus_init(void) { int error;
+ early_platform_cleanup(); + error = device_register(&platform_bus); if (error) { put_device(&platform_bus);
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