From: Colin Cross <ccross@android.com>
Date: Fri, 13 Dec 2013 22:24:49 +0000 (-0800)
Subject: ion: remove IS_ERR_OR_NULL
X-Git-Tag: v3.14-rc1~150^2~402
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9e907654d3c0ff58fb27b51d94128a9749c7e85c;p=pandora-kernel.git

ion: remove IS_ERR_OR_NULL

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>
---

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