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drm: move allocation out of drm_get_format_name()

Selaa lähdekoodia 
The function's behaviour was changed in 90844f0004, 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: 90844f0004 ("drm: make drm_get_format_name thread-safe")
Cc: Rob Clark <robdclark@gmail.com>
Cc: Christian König <christian.koenig@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Acked-by: Rob Clark <robdclark@gmail.com>
Acked-by: Sinclair Yeh <syeh@vmware.com> (vmwgfx)
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Suggested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Eric Engestrom <eric@engestrom.ch>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20161112011309.9799-1-eric@engestrom.ch
This commit is contained in:
Eric Engestrom
2016-11-12 01:12:56 +00:00
committed by Daniel Vetter
vanhempi f92e1ee52a
commit b3c11ac267
17 muutettua tiedostoa jossa 82 lisäystä ja 87 poistoa
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10
drivers/gpu/drm/i915/i915_debugfs.c
Näytä tiedosto

@@ -3032,7 +3032,7 @@ 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;
struct drm_format_name_buf format_name;
if (!plane->state) {
seq_puts(m, "plane->state is NULL!\n");
@@ -3042,9 +3042,9 @@ 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.str, "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",
@@ -3060,10 +3060,8 @@ static void intel_plane_info(struct seq_file *m, struct intel_crtc *intel_crtc)
((state->src_w & 0xffff) * 15625) >> 10,
(state->src_h >> 16),
((state->src_h & 0xffff) * 15625) >> 10,
format_name,
format_name.str,
plane_rotation(state->rotation));
kfree(format_name);
}
}