deinterlace: fix kasan bug in di_task_handle [1/1]

PD#173820

Problem:
kasan bug in di_task_handle

Solution:
delete cma_mutex because it has no effect

Verify:
P321

Change-Id: Ie6ca7973576e7350870c5466b54b38b490dff65e
Signed-off-by: Jihong Sui <jihong.sui@amlogic.com>

diff --git a/drivers/amlogic/media/deinterlace/deinterlace.c b/drivers/amlogic/media/deinterlace/deinterlace.c
index 6d4edcf..8f167bd 100644 (file)
--- a/drivers/amlogic/media/deinterlace/deinterlace.c
+++ b/drivers/amlogic/media/deinterlace/deinterlace.c
@@ -6322,7 +6322,7 @@ static int di_task_handle(void *data)
                                di_pre_stru.reg_req_flag_irq = 0;
                        }
                        #ifdef CONFIG_CMA
-                       mutex_lock(&de_devp->cma_mutex);
+                       /* mutex_lock(&de_devp->cma_mutex);*/
                        if (di_pre_stru.cma_release_req) {
                                atomic_set(&devp->mem_flag, 0);
                                di_cma_release(devp);
@@ -6337,7 +6337,7 @@ static int di_task_handle(void *data)
                                di_pre_stru.cma_alloc_req = 0;
                                di_pre_stru.cma_alloc_done = 1;
                        }
-                       mutex_unlock(&de_devp->cma_mutex);
+                       /* mutex_unlock(&de_devp->cma_mutex); */
                        #endif
                }
                if (de_devp->flags & DI_VPU_CLKB_SET) {
@@ -7451,7 +7451,7 @@ static int di_probe(struct platform_device *pdev)
        } else {
                        atomic_set(&di_devp->mem_flag, 1);
        }
-       mutex_init(&di_devp->cma_mutex);
+       /* mutex_init(&di_devp->cma_mutex); */
        INIT_LIST_HEAD(&di_devp->pq_table_list);
 
        atomic_set(&di_devp->pq_flag, 0);

diff --git a/drivers/amlogic/media/deinterlace/deinterlace.h b/drivers/amlogic/media/deinterlace/deinterlace.h
index ed2442e..0878ee3 100644 (file)
--- a/drivers/amlogic/media/deinterlace/deinterlace.h
+++ b/drivers/amlogic/media/deinterlace/deinterlace.h
@@ -235,7 +235,7 @@ struct di_dev_s {
        unsigned int       post_wr_support;
        unsigned int nrds_enable;
        unsigned int pps_enable;
-       struct  mutex      cma_mutex;
+       /*struct        mutex      cma_mutex;*/
        unsigned int       flag_cma;
        struct page                     *total_pages;
        atomic_t                        mem_flag;