diff options
| author | Kuogee Hsieh <khsieh@codeaurora.org> | 2014-12-03 09:27:50 -0800 |
|---|---|---|
| committer | David Keitel <dkeitel@codeaurora.org> | 2016-03-23 20:36:37 -0700 |
| commit | 2caa0b46c7b180a9895a765478ff65603eba6066 (patch) | |
| tree | 1a333dedb6c897b7a0da842bb25ff902f5168116 | |
| parent | c7148fab72a3cb55378e6410093c8026414a1a40 (diff) | |
msm: mdss: spin lock is necessary when reset rdptr_enabled
At cmd_stop, spin lock protection is necessary when reset rdptr_enabled
to 1. Otherwise race condition may happen and cause timeout.
CRs-Fixed: 766216
Change-Id: I128f73a069d3068c852f4b25c6515ec834e82162
Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>
| -rw-r--r-- | drivers/video/fbdev/msm/mdss_mdp_intf_cmd.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/video/fbdev/msm/mdss_mdp_intf_cmd.c b/drivers/video/fbdev/msm/mdss_mdp_intf_cmd.c index e43137fd7cd5..e7fb1f660286 100644 --- a/drivers/video/fbdev/msm/mdss_mdp_intf_cmd.c +++ b/drivers/video/fbdev/msm/mdss_mdp_intf_cmd.c @@ -859,6 +859,7 @@ int mdss_mdp_cmd_intfs_stop(struct mdss_mdp_ctl *ctl, int session, struct mdss_mdp_cmd_ctx *sctx = NULL; struct mdss_mdp_cmd_ctx *ctx; unsigned long flags; + unsigned long sflags; int need_wait = 0; int ret = 0; int hz; @@ -894,8 +895,12 @@ int mdss_mdp_cmd_intfs_stop(struct mdss_mdp_ctl *ctl, int session, * next vsync if there has no kickoff pending */ ctx->rdptr_enabled = 1; - if (sctx && sctx->rdptr_enabled) - sctx->rdptr_enabled = 1; + if (sctx) { + spin_lock_irqsave(&sctx->clk_lock, sflags); + if (sctx->rdptr_enabled) + sctx->rdptr_enabled = 1; + spin_unlock_irqrestore(&sctx->clk_lock, sflags); + } } spin_unlock_irqrestore(&ctx->clk_lock, flags); |