From: KyongHo Cho <pullip.cho@samsung.com>
Date: Fri, 13 Dec 2013 22:23:39 +0000 (-0800)
Subject: gpu: ion: several bugfixes and enhancements of ION
X-Git-Tag: v3.14-rc1~150^2~472
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=54ac078421ae89b8ac28357bb615262174aec255;p=pandora-kernel.git

gpu: ion: several bugfixes and enhancements of ION

1. Verifying if the size of memory allocation in ion_alloc() is aligned
by PAGE_SIZE at least. If it is not, this change makes the size to be
aligned by PAGE_SIZE.

2. Unmaps all mappings to the kernel and DMA address spaces when
destroying ion_buffer in ion_buffer_destroy(). This prevents leaks in
those virtual address spaces.

3. Makes the return value of ion_alloc() to be explicit Linux error code
when it fails to allocate a buffer.

4. Makes ion_alloc() implementation simpler. Removes 'goto' statement and
relavant call to ion_buffer_put().

5. Checks if the task is valid before calling put_task_struct() due
to failure on creating a ion client in ion_client_create().

6. Returns error when buffer allocation requested by userspace is failed.

Signed-off-by: KyongHo Cho <pullip.cho@samsung.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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