brillcodec: fix release memory routine.

If release memory occurs twice with the same memory offset,
it might cause an error.
semaphore for memory block should be increased in the if-statement.

Change-Id: Ic332eec1e64d5b134b8671b38552b470196e01a0
Signed-off-by: Kitae Kim <kt920.kim@samsung.com>

diff --git a/drivers/maru/maru_brillcodec.c b/drivers/maru/maru_brillcodec.c
index 555797d505de3044f780a34ed35a43e6cab0dfd1..70ce8775c0607871bcbd0539458f89aa87db8f74 100644 (file)
--- a/drivers/maru/maru_brillcodec.c
+++ b/drivers/maru/maru_brillcodec.c
@@ -337,6 +337,7 @@ static void release_device_memory(uint32_t mem_offset)
        struct device_mem *unit = NULL;
        enum block_size index = SMALL;
        struct memory_block *block = NULL;
+       bool found = false;
 
        struct list_head *pos, *temp;
 
@@ -360,25 +361,30 @@ static void release_device_memory(uint32_t mem_offset)
                                unit->blk_id = 0;
                                list_move_tail(&unit->entry, &block->available);
 
+                               if (block->last_buf_secured) {
+                                       block->last_buf_secured = 0;
+                                       up(&block->last_buf_semaphore);
+                                       DEBUG("unlock last buffer semaphore.\n");
+                               } else {
+                                       up(&block->semaphore);
+                                       DEBUG("unlock semaphore: %d.\n", block->semaphore.count);
+                               }
+
+                               found = true;
+
                                break;
                        }
                }
+               if (!found) {
+                       // can not enter here...
+                       ERROR("there is no used memory block. offset = 0x%x.\n", (uint32_t)mem_offset);
+               }
        } else {
                // can not enter here...
                ERROR("there is no used memory block.\n");
        }
 
-       if (block->last_buf_secured) {
-               block->last_buf_secured = 0;
-               up(&block->last_buf_semaphore);
-               DEBUG("unlock last buffer semaphore.\n");
-       } else {
-               up(&block->semaphore);
-               DEBUG("unlock semaphore: %d.\n", block->semaphore.count);
-       }
-
        mutex_unlock(&block->access_mutex);
-
 }
 
 static void maru_brill_codec_info_cache(void)
@@ -953,7 +959,7 @@ static int __devinit maru_brill_codec_probe(struct pci_dev *pci_dev,
 
        maru_brill_codec->dev = pci_dev;
 
-    INIT_LIST_HEAD(&maru_brill_codec->user_pid_mgr);
+       INIT_LIST_HEAD(&maru_brill_codec->user_pid_mgr);
 
        // initialize memory block structures
        maru_brill_codec->memory_blocks[0].unit_size = CODEC_S_DEVICE_MEM_SIZE;