提交 270b77a0 编写于 作者: G Greg Kroah-Hartman

Merge tag 'drm-fixes-2018-10-20-1' of git://anongit.freedesktop.org/drm/drm

Dave writes:
  "drm fixes for 4.19 final (part 2)

   Looked like two stragglers snuck in, one very urgent the pageflipping
   was missing a reference that could result in a GPF on non-i915
   drivers, the other is an overflow in the sun4i dotclock calcs
   resulting in a mode not getting set."

* tag 'drm-fixes-2018-10-20-1' of git://anongit.freedesktop.org/drm/drm:
  drm/sun4i: Fix an ulong overflow in the dotclock driver
  drm: Get ref on CRTC commit object when waiting for flip_done
......@@ -174,6 +174,11 @@ void drm_atomic_state_default_clear(struct drm_atomic_state *state)
state->crtcs[i].state = NULL;
state->crtcs[i].old_state = NULL;
state->crtcs[i].new_state = NULL;
if (state->crtcs[i].commit) {
drm_crtc_commit_put(state->crtcs[i].commit);
state->crtcs[i].commit = NULL;
}
}
for (i = 0; i < config->num_total_plane; i++) {
......
......@@ -1408,15 +1408,16 @@ EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks);
void drm_atomic_helper_wait_for_flip_done(struct drm_device *dev,
struct drm_atomic_state *old_state)
{
struct drm_crtc_state *new_crtc_state;
struct drm_crtc *crtc;
int i;
for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) {
struct drm_crtc_commit *commit = new_crtc_state->commit;
for (i = 0; i < dev->mode_config.num_crtc; i++) {
struct drm_crtc_commit *commit = old_state->crtcs[i].commit;
int ret;
if (!commit)
crtc = old_state->crtcs[i].ptr;
if (!crtc || !commit)
continue;
ret = wait_for_completion_timeout(&commit->flip_done, 10 * HZ);
......@@ -1934,6 +1935,9 @@ int drm_atomic_helper_setup_commit(struct drm_atomic_state *state,
drm_crtc_commit_get(commit);
commit->abort_completion = true;
state->crtcs[i].commit = commit;
drm_crtc_commit_get(commit);
}
for_each_oldnew_connector_in_state(state, conn, old_conn_state, new_conn_state, i) {
......
......@@ -81,9 +81,19 @@ static long sun4i_dclk_round_rate(struct clk_hw *hw, unsigned long rate,
int i;
for (i = tcon->dclk_min_div; i <= tcon->dclk_max_div; i++) {
unsigned long ideal = rate * i;
u64 ideal = (u64)rate * i;
unsigned long rounded;
/*
* ideal has overflowed the max value that can be stored in an
* unsigned long, and every clk operation we might do on a
* truncated u64 value will give us incorrect results.
* Let's just stop there since bigger dividers will result in
* the same overflow issue.
*/
if (ideal > ULONG_MAX)
goto out;
rounded = clk_hw_round_rate(clk_hw_get_parent(hw),
ideal);
......
......@@ -153,6 +153,17 @@ struct __drm_planes_state {
struct __drm_crtcs_state {
struct drm_crtc *ptr;
struct drm_crtc_state *state, *old_state, *new_state;
/**
* @commit:
*
* A reference to the CRTC commit object that is kept for use by
* drm_atomic_helper_wait_for_flip_done() after
* drm_atomic_helper_commit_hw_done() is called. This ensures that a
* concurrent commit won't free a commit object that is still in use.
*/
struct drm_crtc_commit *commit;
s32 __user *out_fence_ptr;
u64 last_vblank_count;
};
......
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