From b3c11ac267d461d3d597967164ff7278a919a39f Mon Sep 17 00:00:00 2001 From: Eric Engestrom Date: Sat, 12 Nov 2016 01:12:56 +0000 Subject: drm: move allocation out of drm_get_format_name() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The function's behaviour was changed in 90844f00049e, without changing its signature, causing people to keep using it the old way without realising they were now leaking memory. Rob Clark also noticed it was also allocating GFP_KERNEL memory in atomic contexts, breaking them. Instead of having to allocate GFP_ATOMIC memory and fixing the callers to make them cleanup the memory afterwards, let's change the function's signature by having the caller take care of the memory and passing it to the function. The new parameter is a single-field struct in order to enforce the size of its buffer and help callers to correctly manage their memory. Fixes: 90844f00049e ("drm: make drm_get_format_name thread-safe") Cc: Rob Clark Cc: Christian König Acked-by: Christian König Acked-by: Rob Clark Acked-by: Sinclair Yeh (vmwgfx) Reviewed-by: Jani Nikula Suggested-by: Ville Syrjälä Signed-off-by: Eric Engestrom Signed-off-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/20161112011309.9799-1-eric@engestrom.ch --- drivers/gpu/drm/radeon/atombios_crtc.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) (limited to 'drivers/gpu/drm/radeon/atombios_crtc.c') diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c index 74f99bac08b1..05f4ebe31ce2 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; + struct 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; + struct 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; } -- cgit v1.2.3