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    • B
      gpio: fix probe() error return in gpio driver probes · a342d215
      Ben Dooks 提交于
      A number of drivers in drivers/gpio return -ENODEV when confronted with
      missing setup parameters such as the platform data.  However, returning
      -ENODEV causes the driver layer to silently ignore the driver as it
      assumes the probe did not find anything and was only speculative.
      
      To make life easier to discern why a driver is not being attached, change
      to returning -EINVAL, which is a better description of the fact that the
      driver data was not valid.
      
      Also add a set of dev_dbg() statements to the error paths to provide an
      better explanation of the error as there may be more that one point in the
      driver.
      Signed-off-by: NBen Dooks <ben-linux@fluff.org>
      Cc: David Brownell <david-b@pacbell.net>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      a342d215
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