drm/msm: gracefully handle NULL return from setup_pagetable()

There is a possibility that load_gpu() can fail to initialize and turn
on the GPU successfully due to system level issues such as a clock or a
regulator not turning on. In such a case setup_pagetable() returns a
NULL pointer which is not handled correctly in msm_open(). This leads to
a crash in INIT_LIST_HEAD() which tries to access a NULL pointer. This
patch properly handles the NULL return and initializes the list head
only if the gpu load was successful, also adds missing NULL checks to
places in the code where the msm_file_private structure was being accessed.

Change-Id: I6eb85227d928a82c3cf2553fd6645affdd986473
Signed-off-by: Sharat Masetty <smasetty@codeaurora.org>

0 files changed, 0 insertions, 0 deletions