Messages in this thread | | | From | "Huang\, Ying" <> | Subject | Re: [LKP] [lkp] [gpio] 3c702e9987: kmsg.user_verbs:couldn't_register_device_number | Date | Mon, 15 Feb 2016 10:39:11 +0800 |
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Michael Welling <mwelling@ieee.org> writes:
> On Sun, Feb 14, 2016 at 02:59:06PM +0800, kernel test robot wrote: >> FYI, we noticed the below changes on >> >> https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio.git chardev >> commit 3c702e9987e261042a07e43460a8148be254412e ("gpio: add a userspace chardev ABI for GPIOs") >> >> >> [ 1.951191] user_verbs: couldn't register device number > > Looks like user_verbs is using a static device node setup. > > enum { > IB_UVERBS_MAJOR = 231, > IB_UVERBS_BASE_MINOR = 192, > IB_UVERBS_MAX_DEVICES = 32 > }; > > #define IB_UVERBS_BASE_DEV MKDEV(IB_UVERBS_MAJOR, IB_UVERBS_BASE_MINOR) > > Something tells me that a new GPIO chardev is taking this spot. > > It looks like the device is documented to be using the range: > https://www.kernel.org/doc/Documentation/devices.txt > > Could you run cat /proc/devices? >
Sorry, the test mechanism is not flexible enough to run some shell command in test system. Could you provide a specialized debug kernel to dump the necessary information in kernel log? We can collect dmesg easily.
Best Regards, Huang, Ying
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