[PATCH] drm: move allocation out of drm_get_format_name()

From: Eric Engestrom
Date: Fri Nov 04 2016 - 21:36:42 EST

Fixes: 90844f00049e9f42573fd31d7c32e8fd31d3fd07

drm: make drm_get_format_name thread-safe

Signed-off-by: Eric Engestrom <eric@xxxxxxxxxxxx>
[danvet: Clarify that the returned pointer must be freed with
kfree().]
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxx>

Suggested-by: Ville SyrjÃlà <ville.syrjala@xxxxxxxxxxxxxxx>
Signed-off-by: Eric Engestrom <eric@xxxxxxxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/dce_v10_0.c | 7 ++---
drivers/gpu/drm/amd/amdgpu/dce_v11_0.c | 7 ++---
drivers/gpu/drm/amd/amdgpu/dce_v6_0.c | 3 +-
drivers/gpu/drm/amd/amdgpu/dce_v8_0.c | 7 ++---
drivers/gpu/drm/drm_atomic.c | 7 +++--
drivers/gpu/drm/drm_crtc.c | 7 +++--
drivers/gpu/drm/drm_fourcc.c | 12 +++-----
drivers/gpu/drm/drm_framebuffer.c | 7 +++--
drivers/gpu/drm/drm_modeset_helper.c | 7 +++--
drivers/gpu/drm/drm_plane.c | 7 +++--
drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c | 7 ++---
drivers/gpu/drm/i915/i915_debugfs.c | 8 ++---
drivers/gpu/drm/i915/intel_atomic_plane.c | 8 ++---
drivers/gpu/drm/i915/intel_display.c | 41 ++++++++++---------------
drivers/gpu/drm/radeon/atombios_crtc.c | 14 ++++-----
drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | 3 +-
include/drm/drm_fourcc.h | 3 +-
17 files changed, 71 insertions(+), 84 deletions(-)

diff --git a/include/drm/drm_fourcc.h b/include/drm/drm_fourcc.h
index dc0aafa..5a8cb4b 100644
--- a/include/drm/drm_fourcc.h
+++ b/include/drm/drm_fourcc.h
@@ -54,6 +54,7 @@ int drm_format_horz_chroma_subsampling(uint32_t format);
int drm_format_vert_chroma_subsampling(uint32_t format);
int drm_format_plane_width(int width, uint32_t format, int plane);
int drm_format_plane_height(int height, uint32_t format, int plane);
-char *drm_get_format_name(uint32_t format) __malloc;
+typedef char drm_format_name_buf[32];
+char *drm_get_format_name(uint32_t format, drm_format_name_buf buf);

#endif /* __DRM_FOURCC_H__ */
diff --git a/drivers/gpu/drm/drm_fourcc.c b/drivers/gpu/drm/drm_fourcc.c
index cbb8b77..34ed520 100644
--- a/drivers/gpu/drm/drm_fourcc.c
+++ b/drivers/gpu/drm/drm_fourcc.c
@@ -79,17 +79,13 @@ uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth)
EXPORT_SYMBOL(drm_mode_legacy_fb_format);

/**
- * drm_get_format_name - return a string for drm fourcc format
+ * drm_get_format_name - fill a string with a drm fourcc format's name
* @format: format to compute name of
+ * @buf: caller-supplied buffer
- *
- * Note that the buffer returned by this function is owned by the caller
- * and will need to be freed using kfree().
*/
-char *drm_get_format_name(uint32_t format)
+char *drm_get_format_name(uint32_t format, drm_format_name_buf buf)
{
- char *buf = kmalloc(32, GFP_KERNEL);
-
- snprintf(buf, 32,
+ snprintf(buf, sizeof(drm_format_name_buf),
"%c%c%c%c %s-endian (0x%08x)",
printable_char(format & 0xff),
printable_char((format >> 8) & 0xff),
diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c
index 199d3f7..cefa3d8 100644
--- a/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c
@@ -2032,7 +2032,7 @@ static int dce_v10_0_crtc_do_set_base(struct drm_crtc *crtc,
u32 tmp, viewport_w, viewport_h;
int r;
bool bypass_lut = false;
- char *format_name;
+ drm_format_name_buf format_name;

/* no fb bound */
if (!atomic && !crtc->primary->fb) {
@@ -2144,9 +2144,8 @@ static int dce_v10_0_crtc_do_set_base(struct drm_crtc *crtc,
bypass_lut = true;
break;
default:
- format_name = drm_get_format_name(target_fb->pixel_format);
- DRM_ERROR("Unsupported screen format %s\n", format_name);
- kfree(format_name);
+ DRM_ERROR("Unsupported screen format %s\n",
+ drm_get_format_name(target_fb->pixel_format, format_name));
return -EINVAL;
}

diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c
index ecd000e..462abb8 100644
--- a/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c
@@ -2013,7 +2013,7 @@ static int dce_v11_0_crtc_do_set_base(struct drm_crtc *crtc,
u32 tmp, viewport_w, viewport_h;
int r;
bool bypass_lut = false;
- char *format_name;
+ drm_format_name_buf format_name;

/* no fb bound */
if (!atomic && !crtc->primary->fb) {
@@ -2125,9 +2125,8 @@ static int dce_v11_0_crtc_do_set_base(struct drm_crtc *crtc,
bypass_lut = true;
break;
default:
- format_name = drm_get_format_name(target_fb->pixel_format);
- DRM_ERROR("Unsupported screen format %s\n", format_name);
- kfree(format_name);
+ DRM_ERROR("Unsupported screen format %s\n",
+ drm_get_format_name(target_fb->pixel_format, format_name));
return -EINVAL;
}

diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
index 44547f9..3b8cea3 100644
--- a/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
@@ -1456,6 +1456,7 @@ static int dce_v6_0_crtc_do_set_base(struct drm_crtc *crtc,
u32 viewport_w, viewport_h;
int r;
bool bypass_lut = false;
+ drm_format_name_buf format_name;

/* no fb bound */
if (!atomic && !crtc->primary->fb) {
@@ -1559,7 +1560,7 @@ static int dce_v6_0_crtc_do_set_base(struct drm_crtc *crtc,
break;
default:
DRM_ERROR("Unsupported screen format %s\n",
- drm_get_format_name(target_fb->pixel_format));
+ drm_get_format_name(target_fb->pixel_format, format_name));
return -EINVAL;
}

diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c
index 979aedf..8c624b5 100644
--- a/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c
@@ -1910,7 +1910,7 @@ static int dce_v8_0_crtc_do_set_base(struct drm_crtc *crtc,
u32 viewport_w, viewport_h;
int r;
bool bypass_lut = false;
- char *format_name;
+ drm_format_name_buf format_name;

/* no fb bound */
if (!atomic && !crtc->primary->fb) {
@@ -2015,9 +2015,8 @@ static int dce_v8_0_crtc_do_set_base(struct drm_crtc *crtc,
bypass_lut = true;
break;
default:
- format_name = drm_get_format_name(target_fb->pixel_format);
- DRM_ERROR("Unsupported screen format %s\n", format_name);
- kfree(format_name);
+ DRM_ERROR("Unsupported screen format %s\n",
+ drm_get_format_name(target_fb->pixel_format, format_name));
return -EINVAL;
}

diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index c32fb3c..8d2e6a5 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -835,9 +835,10 @@ static int drm_atomic_plane_check(struct drm_plane *plane,
/* Check whether this plane supports the fb pixel format. */
ret = drm_plane_check_pixel_format(plane, state->fb->pixel_format);
if (ret) {
- char *format_name = drm_get_format_name(state->fb->pixel_format);
- DRM_DEBUG_ATOMIC("Invalid pixel format %s\n", format_name);
- kfree(format_name);
+ drm_format_name_buf format_name;
+ DRM_DEBUG_ATOMIC("Invalid pixel format %s\n",
+ drm_get_format_name(state->fb->pixel_format,
+ format_name));
return ret;
}

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 13441e2..7f5bbe3 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -827,9 +827,10 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
ret = drm_plane_check_pixel_format(crtc->primary,
fb->pixel_format);
if (ret) {
- char *format_name = drm_get_format_name(fb->pixel_format);
- DRM_DEBUG_KMS("Invalid pixel format %s\n", format_name);
- kfree(format_name);
+ drm_format_name_buf format_name;
+ DRM_DEBUG_KMS("Invalid pixel format %s\n",
+ drm_get_format_name(fb->pixel_format,
+ format_name));
goto out;
}
}
diff --git a/drivers/gpu/drm/drm_framebuffer.c b/drivers/gpu/drm/drm_framebuffer.c
index 49fd7db..12ad188 100644
--- a/drivers/gpu/drm/drm_framebuffer.c
+++ b/drivers/gpu/drm/drm_framebuffer.c
@@ -133,9 +133,10 @@ static int framebuffer_check(const struct drm_mode_fb_cmd2 *r)

info = __drm_format_info(r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN);
if (!info) {
- char *format_name = drm_get_format_name(r->pixel_format);
- DRM_DEBUG_KMS("bad framebuffer format %s\n", format_name);
- kfree(format_name);
+ drm_format_name_buf format_name;
+ DRM_DEBUG_KMS("bad framebuffer format %s\n",
+ drm_get_format_name(r->pixel_format,
+ format_name));
return -EINVAL;
}

diff --git a/drivers/gpu/drm/drm_modeset_helper.c b/drivers/gpu/drm/drm_modeset_helper.c
index 2544dfe..b6ab72a 100644
--- a/drivers/gpu/drm/drm_modeset_helper.c
+++ b/drivers/gpu/drm/drm_modeset_helper.c
@@ -75,10 +75,11 @@ void drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,

info = drm_format_info(mode_cmd->pixel_format);
if (!info || !info->depth) {
- char *format_name = drm_get_format_name(mode_cmd->pixel_format);
+ drm_format_name_buf format_name;

- DRM_DEBUG_KMS("non-RGB pixel format %s\n", format_name);
- kfree(format_name);
+ DRM_DEBUG_KMS("non-RGB pixel format %s\n",
+ drm_get_format_name(mode_cmd->pixel_format,
+ format_name));

fb->depth = 0;
fb->bits_per_pixel = 0;
diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c
index 249c0ae..9a45c52 100644
--- a/drivers/gpu/drm/drm_plane.c
+++ b/drivers/gpu/drm/drm_plane.c
@@ -479,9 +479,10 @@ static int __setplane_internal(struct drm_plane *plane,
/* Check whether this plane supports the fb pixel format. */
ret = drm_plane_check_pixel_format(plane, fb->pixel_format);
if (ret) {
- char *format_name = drm_get_format_name(fb->pixel_format);
- DRM_DEBUG_KMS("Invalid pixel format %s\n", format_name);
- kfree(format_name);
+ drm_format_name_buf format_name;
+ DRM_DEBUG_KMS("Invalid pixel format %s\n",
+ drm_get_format_name(fb->pixel_format,
+ format_name));
goto out;
}

diff --git a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c
index 7e7a4d4..c5c0b38 100644
--- a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c
+++ b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c
@@ -608,17 +608,16 @@ static void ade_rdma_set(void __iomem *base, struct drm_framebuffer *fb,
u32 ch, u32 y, u32 in_h, u32 fmt)
{
struct drm_gem_cma_object *obj = drm_fb_cma_get_gem_obj(fb, 0);
- char *format_name;
+ drm_format_name_buf format_name;
u32 reg_ctrl, reg_addr, reg_size, reg_stride, reg_space, reg_en;
u32 stride = fb->pitches[0];
u32 addr = (u32)obj->paddr + y * stride;

DRM_DEBUG_DRIVER("rdma%d: (y=%d, height=%d), stride=%d, paddr=0x%x\n",
ch + 1, y, in_h, stride, (u32)obj->paddr);
- format_name = drm_get_format_name(fb->pixel_format);
DRM_DEBUG_DRIVER("addr=0x%x, fb:%dx%d, pixel_format=%d(%s)\n",
- addr, fb->width, fb->height, fmt, format_name);
+ addr, fb->width, fb->height, fmt,
+ drm_get_format_name(fb->pixel_format, format_name));
- kfree(format_name);

/* get reg offset */
reg_ctrl = RD_CH_CTRL(ch);
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 20638d2..39f76b1 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2971,7 +2971,7 @@ static void intel_plane_info(struct seq_file *m, struct intel_crtc *intel_crtc)
for_each_intel_plane_on_crtc(dev, intel_crtc, intel_plane) {
struct drm_plane_state *state;
struct drm_plane *plane = &intel_plane->base;
- char *format_name;
+ drm_format_name_buf format_name;

if (!plane->state) {
seq_puts(m, "plane->state is NULL!\n");
@@ -2981,9 +2981,9 @@ static void intel_plane_info(struct seq_file *m, struct intel_crtc *intel_crtc)
state = plane->state;

if (state->fb) {
- format_name = drm_get_format_name(state->fb->pixel_format);
+ drm_get_format_name(state->fb->pixel_format, format_name);
} else {
- format_name = kstrdup("N/A", GFP_KERNEL);
+ sprintf(format_name, "N/A");
}

seq_printf(m, "\t--Plane id %d: type=%s, crtc_pos=%4dx%4d, crtc_size=%4dx%4d, src_pos=%d.%04ux%d.%04u, src_size=%d.%04ux%d.%04u, format=%s, rotation=%s\n",
@@ -3001,8 +3001,6 @@ static void intel_plane_info(struct seq_file *m, struct intel_crtc *intel_crtc)
((state->src_h & 0xffff) * 15625) >> 10,
format_name,
plane_rotation(state->rotation));
-
- kfree(format_name);
}
}

diff --git a/drivers/gpu/drm/i915/intel_atomic_plane.c b/drivers/gpu/drm/i915/intel_atomic_plane.c
index c762ae5..289ebc9 100644
--- a/drivers/gpu/drm/i915/intel_atomic_plane.c
+++ b/drivers/gpu/drm/i915/intel_atomic_plane.c
@@ -143,7 +143,7 @@ static int intel_plane_atomic_check(struct drm_plane *plane,
crtc_state->base.enable ? crtc_state->pipe_src_h : 0;

if (state->fb && drm_rotation_90_or_270(state->rotation)) {
- char *format_name;
+ drm_format_name_buf format_name;

if (!(state->fb->modifier[0] == I915_FORMAT_MOD_Y_TILED ||
state->fb->modifier[0] == I915_FORMAT_MOD_Yf_TILED)) {
@@ -159,9 +159,9 @@ static int intel_plane_atomic_check(struct drm_plane *plane,
switch (state->fb->pixel_format) {
case DRM_FORMAT_C8:
case DRM_FORMAT_RGB565:
- format_name = drm_get_format_name(state->fb->pixel_format);
- DRM_DEBUG_KMS("Unsupported pixel format %s for 90/270!\n", format_name);
- kfree(format_name);
+ DRM_DEBUG_KMS("Unsupported pixel format %s for 90/270!\n",
+ drm_get_format_name(state->fb->pixel_format,
+ format_name));
return -EINVAL;

default:
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 6f8f6ec..ab0882f 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -12871,7 +12871,7 @@ static void intel_dump_pipe_config(struct intel_crtc *crtc,

DRM_DEBUG_KMS("planes on this crtc\n");
list_for_each_entry(plane, &dev->mode_config.plane_list, head) {
- char *format_name;
+ drm_format_name_buf format_name;
intel_plane = to_intel_plane(plane);
if (intel_plane->pipe != crtc->pipe)
continue;
@@ -12884,12 +12884,11 @@ static void intel_dump_pipe_config(struct intel_crtc *crtc,
continue;
}

- format_name = drm_get_format_name(fb->pixel_format);
-
DRM_DEBUG_KMS("[PLANE:%d:%s] enabled",
plane->base.id, plane->name);
DRM_DEBUG_KMS("\tFB:%d, fb = %ux%u format = %s",
- fb->base.id, fb->width, fb->height, format_name);
+ fb->base.id, fb->width, fb->height,
+ drm_get_format_name(fb->pixel_format, format_name));
DRM_DEBUG_KMS("\tscaler:%d src %dx%d+%d+%d dst %dx%d+%d+%d\n",
state->scaler_id,
state->base.src.x1 >> 16,
@@ -12899,8 +12898,6 @@ static void intel_dump_pipe_config(struct intel_crtc *crtc,
state->base.dst.x1, state->base.dst.y1,
drm_rect_width(&state->base.dst),
drm_rect_height(&state->base.dst));
-
- kfree(format_name);
}
}

@@ -15749,7 +15746,7 @@ static int intel_framebuffer_init(struct drm_device *dev,
unsigned int tiling = i915_gem_object_get_tiling(obj);
int ret;
u32 pitch_limit, stride_alignment;
- char *format_name;
+ drm_format_name_buf format_name;

WARN_ON(!mutex_is_locked(&dev->struct_mutex));

@@ -15840,18 +15837,16 @@ static int intel_framebuffer_init(struct drm_device *dev,
break;
case DRM_FORMAT_XRGB1555:
if (INTEL_INFO(dev)->gen > 3) {
- format_name = drm_get_format_name(mode_cmd->pixel_format);
- DRM_DEBUG("unsupported pixel format: %s\n", format_name);
- kfree(format_name);
+ DRM_DEBUG("unsupported pixel format: %s\n",
+ drm_get_format_name(mode_cmd->pixel_format, format_name));
return -EINVAL;
}
break;
case DRM_FORMAT_ABGR8888:
if (!IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv) &&
INTEL_INFO(dev)->gen < 9) {
- format_name = drm_get_format_name(mode_cmd->pixel_format);
- DRM_DEBUG("unsupported pixel format: %s\n", format_name);
- kfree(format_name);
+ DRM_DEBUG("unsupported pixel format: %s\n",
+ drm_get_format_name(mode_cmd->pixel_format, format_name));
return -EINVAL;
}
break;
@@ -15859,17 +15854,15 @@ static int intel_framebuffer_init(struct drm_device *dev,
case DRM_FORMAT_XRGB2101010:
case DRM_FORMAT_XBGR2101010:
if (INTEL_INFO(dev)->gen < 4) {
- format_name = drm_get_format_name(mode_cmd->pixel_format);
- DRM_DEBUG("unsupported pixel format: %s\n", format_name);
- kfree(format_name);
+ DRM_DEBUG("unsupported pixel format: %s\n",
+ drm_get_format_name(mode_cmd->pixel_format, format_name));
return -EINVAL;
}
break;
case DRM_FORMAT_ABGR2101010:
if (!IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv)) {
- format_name = drm_get_format_name(mode_cmd->pixel_format);
- DRM_DEBUG("unsupported pixel format: %s\n", format_name);
- kfree(format_name);
+ DRM_DEBUG("unsupported pixel format: %s\n",
+ drm_get_format_name(mode_cmd->pixel_format, format_name));
return -EINVAL;
}
break;
@@ -15878,16 +15871,14 @@ static int intel_framebuffer_init(struct drm_device *dev,
case DRM_FORMAT_YVYU:
case DRM_FORMAT_VYUY:
if (INTEL_INFO(dev)->gen < 5) {
- format_name = drm_get_format_name(mode_cmd->pixel_format);
- DRM_DEBUG("unsupported pixel format: %s\n", format_name);
- kfree(format_name);
+ DRM_DEBUG("unsupported pixel format: %s\n",
+ drm_get_format_name(mode_cmd->pixel_format, format_name));
return -EINVAL;
}
break;
default:
- format_name = drm_get_format_name(mode_cmd->pixel_format);
- DRM_DEBUG("unsupported pixel format: %s\n", format_name);
- kfree(format_name);
+ DRM_DEBUG("unsupported pixel format: %s\n",
+ drm_get_format_name(mode_cmd->pixel_format, format_name));
return -EINVAL;
}

diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c
index 74f99ba..adff13b 100644
--- a/drivers/gpu/drm/radeon/atombios_crtc.c
+++ b/drivers/gpu/drm/radeon/atombios_crtc.c
@@ -1156,7 +1156,7 @@ static int dce4_crtc_do_set_base(struct drm_crtc *crtc,
u32 tmp, viewport_w, viewport_h;
int r;
bool bypass_lut = false;
- char *format_name;
+ drm_format_name_buf format_name;

/* no fb bound */
if (!atomic && !crtc->primary->fb) {
@@ -1260,9 +1260,8 @@ static int dce4_crtc_do_set_base(struct drm_crtc *crtc,
bypass_lut = true;
break;
default:
- format_name = drm_get_format_name(target_fb->pixel_format);
- DRM_ERROR("Unsupported screen format %s\n", format_name);
- kfree(format_name);
+ DRM_ERROR("Unsupported screen format %s\n",
+ drm_get_format_name(target_fb->pixel_format, format_name));
return -EINVAL;
}

@@ -1473,7 +1472,7 @@ static int avivo_crtc_do_set_base(struct drm_crtc *crtc,
u32 viewport_w, viewport_h;
int r;
bool bypass_lut = false;
- char *format_name;
+ drm_format_name_buf format_name;

/* no fb bound */
if (!atomic && !crtc->primary->fb) {
@@ -1563,9 +1562,8 @@ static int avivo_crtc_do_set_base(struct drm_crtc *crtc,
bypass_lut = true;
break;
default:
- format_name = drm_get_format_name(target_fb->pixel_format);
- DRM_ERROR("Unsupported screen format %s\n", format_name);
- kfree(format_name);
+ DRM_ERROR("Unsupported screen format %s\n",
+ drm_get_format_name(target_fb->pixel_format, format_name));
return -EINVAL;
}

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
index c965514..7376307 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
@@ -985,8 +985,9 @@ static struct drm_framebuffer *vmw_kms_fb_create(struct drm_device *dev,

info = drm_format_info(mode_cmd2->pixel_format);
if (!info || !info->depth) {
+ drm_format_name_buf format_name;
DRM_ERROR("Unsupported framebuffer format %s\n",
- drm_get_format_name(mode_cmd2->pixel_format));
+ drm_get_format_name(mode_cmd2->pixel_format, format_name));
return ERR_PTR(-EINVAL);
}

--
Cheers,
Eric