drm/rockchip: cleanup fb when drm_gem_fb_afbc_init failed

In the function drm_gem_fb_init_with_funcs, the framebuffer (fb) and
its corresponding object ID have already been registered.

So we need to do cleanup the drm framebuffer if the subsequent execution
of drm_gem_fb_afbc_init fails.

Or we will meet list_del corruption like bellow when userspace call
drm_mode_rmfb to remove all the previous created fb:

[  202.019304] list_del corruption. prev->next should be ffffff817eba4608, but was 0000000000000000. (prev=ffffff817eba5f08)
[  202.019340] kernel BUG at lib/list_debug.c:61!
[  202.019346] Internal error: Oops - BUG: 00000000f2000800 [khadas#1] PREEMPT SMP
[  202.021421] Modules linked in: bcmdhd(O) r8168
[  202.021884] CPU: 7 PID: 395 Comm: binder:339_3 Tainted: G W  O       6.1.118 khadas#59
[  202.022648] Hardware name: Rockchip RK3588 EVB1 LP4 V10 Board (DT)
[  202.023249] pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[  202.023925] pc : __list_del_entry_valid+0xbc/0xd0
[  202.024409] lr : __list_del_entry_valid+0xbc/0xd0
[  202.024889] sp : ffffffc00dd8bb40
[  202.025248] x29: ffffffc00dd8bb40 x28: 00000000000000af x27:ffffff81088ab600
[  202.025936] x26: 0000000000000004 x25: ffffff810880eac0 x24:ffffffc00962bc98
[  202.026623] x23: 0000000000000000 x22: ffffff81002be000 x21:ffffff817eba4608
[  202.027310] x20: ffffff817eba4600 x19: ffffff81002be218 x18:ffffffc00dbc5080
[  202.027998] x17: 20747562202c3830 x16: ffffffffffffffff x15:0000000000000004
[  202.028684] x14: ffffffc00a06c980 x13: 0000000000001d5a x12:0000000000000003
[  202.029372] x11: 000000010000dd5a x10: c00000010000dd5a x9 :02c01f0f68978400
[  202.030059] x8 : 02c01f0f68978400 x7 : 205b5d3430333931 x6 :302e32303220205b
[  202.030747] x5 : ffffffc00a493617 x4 : ffffffc00dd8b897 x3 :0000000000000000
[  202.031434] x2 : 0000000000000000 x1 : ffffffc00dd8b900 x0 :000000000000006d
[  202.032121] Call trace:
[  202.032395]  __list_del_entry_valid+0xbc/0xd0
[  202.032843]  drm_framebuffer_cleanup+0x34/0x80
[  202.033305]  __rockchip_drm_fb_destroy+0x18/0x1ec
[  202.033789]  rockchip_drm_fb_destroy+0x18/0x40
[  202.034247]  drm_framebuffer_free+0x30/0x40
[  202.034674]  drm_mode_object_put+0x60/0xac
[  202.035100]  drm_mode_rmfb+0x170/0x1a4
[  202.035493]  drm_mode_rmfb_ioctl+0x14/0x20
[  202.035920]  drm_ioctl_kernel+0x80/0xf8
[  202.036324]  drm_ioctl+0x2d4/0x554

Change-Id: I191e2b2a1b8229da1642ac58a6adc8fc3a3d71ea
Signed-off-by: Andy Yan <[email protected]>

Author: Andy Yan

drivers/gpu/drm/rockchip/rockchip_drm_fb.c

@@ -350,12 +350,7 @@ rockchip_fb_create(struct drm_device *dev, struct drm_file *file,
 	if (drm_is_afbc(mode_cmd->modifier[0])) {
 		ret = drm_gem_fb_afbc_init(dev, mode_cmd, afbc_fb);
 		if (ret) {
-			struct drm_gem_object **obj = afbc_fb->base.obj;
-
-			for (i = 0; i < info->num_planes; ++i)
-				drm_gem_object_put(obj[i]);
-
-			kfree(afbc_fb);
+			drm_framebuffer_put(&afbc_fb->base);
 			return ERR_PTR(ret);
 		}
 	}