[media] media: s5p_mfc: remove s5p_mfc_get_node_type() function

s5p_mfc_get_node_type() relies on get_index() helper function, which in
turn relies on video_device index numbers assigned on driver
registration. All this code is not really needed, because there is
already access to respective video_device structures via common
s5p_mfc_dev structure. This fixes the issues introduced by patch
1056e4388b0454917a512618c8416a98628fc9ce ("v4l2-dev: Fix race condition
on __video_register_device"), which has been merged in v3.12-rc1.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: stable@vger.kernel.org
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

2 files changed, 7 insertions, 30 deletions

diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc.c b/drivers/media/platform/s5p-mfc/s5p_mfc.c
index e46067a57853..e2aac592d29f 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc.c
@@ -177,21 +177,6 @@ unlock:
                 mutex_unlock(&dev->mfc_mutex);
 }
 
-static enum s5p_mfc_node_type s5p_mfc_get_node_type(struct file *file)
-{
-        struct video_device *vdev = video_devdata(file);
-
-        if (!vdev) {
-                mfc_err("failed to get video_device");
-                return MFCNODE_INVALID;
-        }
-        if (vdev->index == 0)
-                return MFCNODE_DECODER;
-        else if (vdev->index == 1)
-                return MFCNODE_ENCODER;
-        return MFCNODE_INVALID;
-}
-
 static void s5p_mfc_clear_int_flags(struct s5p_mfc_dev *dev)
 {
         mfc_write(dev, 0, S5P_FIMV_RISC_HOST_INT);
@@ -705,6 +690,7 @@ irq_cleanup_hw:
 /* Open an MFC node */
 static int s5p_mfc_open(struct file *file)
 {
+        struct video_device *vdev = video_devdata(file);
         struct s5p_mfc_dev *dev = video_drvdata(file);
         struct s5p_mfc_ctx *ctx = NULL;
         struct vb2_queue *q;
@@ -742,7 +728,7 @@ static int s5p_mfc_open(struct file *file)
         /* Mark context as idle */
         clear_work_bit_irqsave(ctx);
         dev->ctx[ctx->num] = ctx;
-        if (s5p_mfc_get_node_type(file) == MFCNODE_DECODER) {
+        if (vdev == dev->vfd_dec) {
                 ctx->type = MFCINST_DECODER;
                 ctx->c_ops = get_dec_codec_ops();
                 s5p_mfc_dec_init(ctx);
@@ -752,7 +738,7 @@ static int s5p_mfc_open(struct file *file)
                         mfc_err("Failed to setup mfc controls\n");
                         goto err_ctrls_setup;
                 }
-        } else if (s5p_mfc_get_node_type(file) == MFCNODE_ENCODER) {
+        } else if (vdev == dev->vfd_enc) {
                 ctx->type = MFCINST_ENCODER;
                 ctx->c_ops = get_enc_codec_ops();
                 /* only for encoder */
@@ -797,10 +783,10 @@ static int s5p_mfc_open(struct file *file)
         q = &ctx->vq_dst;
         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
         q->drv_priv = &ctx->fh;
-        if (s5p_mfc_get_node_type(file) == MFCNODE_DECODER) {
+        if (vdev == dev->vfd_dec) {
                 q->io_modes = VB2_MMAP;
                 q->ops = get_dec_queue_ops();
-        } else if (s5p_mfc_get_node_type(file) == MFCNODE_ENCODER) {
+        } else if (vdev == dev->vfd_enc) {
                 q->io_modes = VB2_MMAP | VB2_USERPTR;
                 q->ops = get_enc_queue_ops();
         } else {
@@ -819,10 +805,10 @@ static int s5p_mfc_open(struct file *file)
         q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
         q->io_modes = VB2_MMAP;
         q->drv_priv = &ctx->fh;
-        if (s5p_mfc_get_node_type(file) == MFCNODE_DECODER) {
+        if (vdev == dev->vfd_dec) {
                 q->io_modes = VB2_MMAP;
                 q->ops = get_dec_queue_ops();
-        } else if (s5p_mfc_get_node_type(file) == MFCNODE_ENCODER) {
+        } else if (vdev == dev->vfd_enc) {
                 q->io_modes = VB2_MMAP | VB2_USERPTR;
                 q->ops = get_enc_queue_ops();
         } else {
diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_common.h b/drivers/media/platform/s5p-mfc/s5p_mfc_common.h
index d91f7575b088..3874f8b639fe 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc_common.h
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc_common.h
@@ -115,15 +115,6 @@ enum s5p_mfc_fmt_type {
 };
 
 /**
- * enum s5p_mfc_node_type - The type of an MFC device node.
- */
-enum s5p_mfc_node_type {
-        MFCNODE_INVALID = -1,
-        MFCNODE_DECODER = 0,
-        MFCNODE_ENCODER = 1,
-};
-
-/**
  * enum s5p_mfc_inst_type - The type of an MFC instance.
  */
 enum s5p_mfc_inst_type {