staging: comedi: don't release mutex too early in comedi_auto_config()

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`comedi_auto_config()` uses `dev->class_dev` for logging a kernel
message after releasing `dev->mutex`.  There is an unlikely possibility
that the Comedi device `dev` will have been removed by the
`COMEDI_DEVCONFIG` ioctl() command.  Keep hold of the mutex until the
kernel message has been sent to prevent that.  The function can call
`comedi_release_hardware_device()` on error.  In that case, the mutex
must be unlocked before that.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Ian Abbott 2019-04-17 15:35:31 +01:00 • committed by Greg Kroah-Hartman

parent 2e299cc969

commit f439696c81

1 changed files with 2 additions and 1 deletions

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drivers/staging/comedi/drivers.c

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