Messages in this thread | | | Subject | Re: arm qemu test failures due to 'driver-core: platform: probe of-devices only using list of compatibles' | From | Sudeep Holla <> | Date | Mon, 15 Feb 2016 17:41:42 +0000 |
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On 15/02/16 15:41, Guenter Roeck wrote: > On 02/15/2016 02:59 AM, Uwe Kleine-König wrote: >> Hello Guenter, >> >> On Sun, Feb 14, 2016 at 08:50:10AM -0800, Guenter Roeck wrote: >>> Uwe, >>> >>> Your patch 'driver-core: platform: probe of-devices only using list of >>> compatibles' causes the following qemu tests to crash in -next. >>> >>> arm:vexpress-a9:vexpress_defconfig:vexpress-v2p-ca9 >>> arm:vexpress-a15:vexpress_defconfig:vexpress-v2p-ca15-tc1 >>> arm:vexpress-a9:multi_v7_defconfig:vexpress-v2p-ca9 >>> arm:vexpress-a15:multi_v7_defconfig:vexpress-v2p-ca15-tc1 >>> >>> Crash log: >>> >>> VFS: Cannot open root device "mmcblk0" or unknown-block(0,0): error -6 >>> Please append a correct "root=" boot option; here are the available >>> partitions: >>> 1f00 131072 mtdblock0 (driver?) >>> 1f01 32768 mtdblock1 (driver?) >>> Kernel panic - not syncing: VFS: Unable to mount root fs on >>> unknown-block(0,0) >> >> Can you provide a complete boot log? This might already reveal which >> device is failing. It might not be the mmci device but something it >> depends on (clock, bus parent, irq). >> > > Sure, something else may be failing, but why does reverting your patch > fix the problem ? > > Anyway, complete logs are at http://kerneltests.org/builders. > > http://kerneltests.org/builders/qemu-arm-next/builds/376/steps/qemubuildcommand/logs/stdio > >
Sorry for missing this earlier, I could reproduce this on my TC2. The issue is with card-detect gpio probing. It's not related to AMBA probing as discussed on the mail thread.
mfd_add_device adds devices with of_node when cell->of_compatible is matched, but the device created is expected to be matched based on name which the patch under discussion clearly breaks.
One other option I see is to set driver_override for mfd devices (something like below) but I am not sure that can be generic.
-- Regards, Sudeep
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