ion: remove IS_ERR_OR_NULL

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IS_ERR_OR_NULL is often part of a bad pattern that can accidentally
return 0 on error:
if (IS_ERR_OR_NULL(ptr))
    return PTR_ERR(ptr);

It also usually means that the errors of a function are not well
defined.  Replace all uses in ion.c by ensure that the return
type of any function in ion is an ERR_PTR.

Specify that the expected return value from map_kernel or map_dma
heap ops is ERR_PTR, and warn if a heap returns NULL.

Signed-off-by: Colin Cross <ccross@android.com>
[jstultz: modified patch to apply to staging directory]
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Colin Cross 2013-12-13 14:24:49 -08:00 • committed by Greg Kroah-Hartman

parent dfc4a9b176

commit 9e907654d3

2 changed files with 18 additions and 13 deletions

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28

drivers/staging/android/ion/ion.c

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3

drivers/staging/android/ion/ion_priv.h

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