ENGR00309915 [#1087] enhanced video memory mutex

this patch can fix NULL pointer issue in GPU kernel driver with the following log

[<7f240438>] (gckEVENT_AddList+0x0/0x810 [galcore]) from [<7f239ebc>] (gckCOMMAND_Commit+0xf28/0x118c [galcore])
[<7f238f94>] (gckCOMMAND_Commit+0x0/0x118c [galcore]) from [<7f2362dc>] (gckKERNEL_Dispatch+0x120c/0x24e4 [galcore])
[<7f2350d0>] (gckKERNEL_Dispatch+0x0/0x24e4 [galcore]) from [<7f222280>] (drv_ioctl+0x390/0x540 [galcore])
[<7f221ef0>] (drv_ioctl+0x0/0x540 [galcore]) from [<800facd0>] (vfs_ioctl+0x30/0x44)

The false code is at 0x217bc where the 0-pointer happens (r3 = 0)

gcuVIDMEM_NODE_PTR node = (gcuVIDMEM_NODE_PTR)(gcmUINT64_TO_PTR(Record->info.u.FreeVideoMemory.node));
   217b8:                e5953028             ldr           r3, [r5, #40]         ; 0x28

                if (node->VidMem.memory->object.type == gcvOBJ_VIDMEM)
   217bc:                e5932000             ldr           r2, [r3]
   217c0:                e5922000             ldr           r2, [r2]
   217c4:                e152000a             cmp       r2, sl
                {
                     gcmkVERIFY_OK(gckKERNEL_RemoveProcessDB(Event->kernel,

Date: Apr 23, 2014
Signed-off-by: Xianzhong <b07117@freescale.com>
Acked-by: Jason Liu
(cherry picked from commit 13859c2276997dbfd1b45aff1ff598e2ee1d4f74)

0 files changed, 0 insertions, 0 deletions