From: Dan Carpenter <dan.carpenter@linaro.org>
To: harry.wentland@amd.com
Cc: amd-gfx@lists.freedesktop.org
Subject: [bug report] drm/amd/display: Separate setting and programming of cursor
Date: Fri, 3 May 2024 18:11:09 +0300 [thread overview]
Message-ID: <83497c8a-e3e4-4406-920a-a21f047c72e6@moroto.mountain> (raw)
Hello Harry Wentland,
Commit f63f86b5affc ("drm/amd/display: Separate setting and
programming of cursor") from Mar 15, 2024 (linux-next), leads to the
following Smatch static checker warning:
drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c:398 dc_stream_program_cursor_position()
error: we previously assumed 'stream' could be null (see line 397)
drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c
389 bool dc_stream_program_cursor_position(
390 struct dc_stream_state *stream,
391 const struct dc_cursor_position *position)
392 {
393 struct dc *dc;
394 bool reset_idle_optimizations = false;
395 const struct dc_cursor_position *old_position;
396
397 old_position = stream ? &stream->cursor_position : NULL;
^^^^^^^^
The patch adds a NULL check
--> 398 dc = stream->ctx->dc;
^^^^^^^^
The old code didn't check
399
400 if (dc_stream_set_cursor_position(stream, position)) {
401 dc_z10_restore(dc);
402
403 /* disable idle optimizations if enabling cursor */
404 if (dc->idle_optimizations_allowed &&
405 (!old_position->enable || dc->debug.exit_idle_opt_for_cursor_updates) &&
406 position->enable) {
407 dc_allow_idle_optimizations(dc, false);
regards,
dan carpenter
reply other threads:[~2024-05-06 10:00 UTC|newest]
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