drivers/platform/x86: Eliminate a NULL pointer dereference

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Give different error messages if device_enum is NULL or if its type field
has the wrong value.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@r exists@
expression E,E1;
identifier f;
statement S1,S2,S3;
@@

if ((E == NULL && ...) || ...)
{
  ... when != if (...) S1 else S2
      when != E = E1
* E->f
  ... when any
  return ...;
}
else S3
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Matthew Garrett <mjg@redhat.com>

...

This commit is contained in:

Julia Lawall 2010-05-27 18:32:15 +02:00 • committed by Matthew Garrett

parent 6d96e00cef

commit 0fc8f274ae

1 changed files with 7 additions and 3 deletions

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drivers/platform/x86/sony-laptop.c

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