V4L/DVB: ir-core: fix table resize during keymap init

drivers/media/IR/ir-keytable.c would alloc a suitably sized keymap table
only to have it resized as it is populated with the initial keymap.

Signed-off-by: David Härdeman <david@hardeman.nu>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 6 insertions, 4 deletions

diff --git a/drivers/media/IR/ir-keytable.c b/drivers/media/IR/ir-keytable.c
index 1bb4e32f3dc3..ebe24579bf32 100644
--- a/drivers/media/IR/ir-keytable.c
+++ b/drivers/media/IR/ir-keytable.c
@@ -78,6 +78,7 @@ static int ir_resize_table(struct ir_scancode_table *rc_tab)
  * @rc_tab:     the struct ir_scancode_table to set the keycode in
  * @scancode:   the scancode for the ir command
  * @keycode:    the keycode for the ir command
+ * @resize:     whether the keytable may be shrunk
  * @return:     -EINVAL if the keycode could not be inserted, otherwise zero.
  *
  * This routine is used internally to manipulate the scancode->keycode table.
@@ -85,7 +86,8 @@ static int ir_resize_table(struct ir_scancode_table *rc_tab)
  */
 static int ir_do_setkeycode(struct input_dev *dev,
                             struct ir_scancode_table *rc_tab,
-                            unsigned scancode, unsigned keycode)
+                            unsigned scancode, unsigned keycode,
+                            bool resize)
 {
         unsigned int i;
         int old_keycode = KEY_RESERVED;
@@ -129,7 +131,7 @@ static int ir_do_setkeycode(struct input_dev *dev,
 
         if (old_keycode == KEY_RESERVED && keycode != KEY_RESERVED) {
                 /* No previous mapping found, we might need to grow the table */
-                if (ir_resize_table(rc_tab))
+                if (resize && ir_resize_table(rc_tab))
                         return -ENOMEM;
 
                 IR_dprintk(1, "#%d: New scan 0x%04x with key 0x%04x\n",
@@ -177,7 +179,7 @@ static int ir_setkeycode(struct input_dev *dev,
         struct ir_scancode_table *rc_tab = &ir_dev->rc_tab;
 
         spin_lock_irqsave(&rc_tab->lock, flags);
-        rc = ir_do_setkeycode(dev, rc_tab, scancode, keycode);
+        rc = ir_do_setkeycode(dev, rc_tab, scancode, keycode, true);
         spin_unlock_irqrestore(&rc_tab->lock, flags);
         return rc;
 }
@@ -204,7 +206,7 @@ static int ir_setkeytable(struct input_dev *dev,
         spin_lock_irqsave(&rc_tab->lock, flags);
         for (i = 0; i < from->size; i++) {
                 rc = ir_do_setkeycode(dev, to, from->scan[i].scancode,
-                                      from->scan[i].keycode);
+                                      from->scan[i].keycode, false);
                 if (rc)
                         break;
         }