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Date: Sat, 5 Nov 2016 13:56:55 +0700
From: Thomas Hellstrom <thellstrom@...are.com>
To: Eric Engestrom <eric@...estrom.ch>, <linux-kernel@...r.kernel.org>
CC: Ville Syrjälä <ville.syrjala@...ux.intel.com>,
"Alex Deucher" <alexander.deucher@....com>,
Christian König <christian.koenig@....com>,
David Airlie <airlied@...ux.ie>,
Xinliang Liu <z.liuxinliang@...ilicon.com>,
Daniel Vetter <daniel.vetter@...el.com>,
"Jani Nikula" <jani.nikula@...ux.intel.com>,
VMware Graphics <linux-graphics-maintainer@...are.com>,
Sinclair Yeh <syeh@...are.com>,
"Tom St Denis" <tom.stdenis@....com>,
Michel Dänzer <michel.daenzer@....com>,
Gustavo Padovan <gustavo.padovan@...labora.co.uk>,
Emily Deng <Emily.Deng@....com>,
Chunming Zhou <David1.Zhou@....com>,
"Flora Cui" <Flora.Cui@....com>,
Vitaly Prosyak <vitaly.prosyak@....com>,
Ken Wang <Qingqing.Wang@....com>,
Colin Ian King <colin.king@...onical.com>,
"Alexandre Demers" <alexandre.f.demers@...il.com>,
Junwei Zhang <Jerry.Zhang@....com>,
Xinwei Kong <kong.kongxinwei@...ilicon.com>,
Chris Wilson <chris@...is-wilson.co.uk>,
Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
Wei Yongjun <yongjun_wei@...ndmicro.com.cn>,
<dri-devel@...ts.freedesktop.org>,
<intel-gfx@...ts.freedesktop.org>
Subject: Re: [PATCH] drm: move allocation out of drm_get_format_name()
For the vmwgfx part:
Acked-by: Thomas Hellstrom <thellstrom@...are.com>
On 11/05/2016 08:33 AM, Eric Engestrom wrote:
> Fixes: 90844f00049e9f42573fd31d7c32e8fd31d3fd07
>
> drm: make drm_get_format_name thread-safe
>
> Signed-off-by: Eric Engestrom <eric@...estrom.ch>
> [danvet: Clarify that the returned pointer must be freed with
> kfree().]
> Signed-off-by: Daniel Vetter <daniel.vetter@...ll.ch>
>
> Suggested-by: Ville Syrjälä <ville.syrjala@...ux.intel.com>
> Signed-off-by: Eric Engestrom <eric@...estrom.ch>
> ---
> 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);
> }
>
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