diff options
| author | Alex Frid <afrid@nvidia.com> | 2011-08-05 00:28:10 -0700 |
|---|---|---|
| committer | Varun Colbert <vcolbert@nvidia.com> | 2011-08-08 11:36:51 -0700 |
| commit | 6527d8347a132f443d88b54f9548e76d522e8d9d (patch) | |
| tree | d11ac7e6326cc8425d50169902127da5c159bd5c | |
| parent | 3b25cf262df6e4cd33fd99329a62c42608f12b98 (diff) | |
ARM: tegra: power: Propagate Tegra3 EMC parent ref count
Since, Tegra3 low level suspend code may change EMC parent underneath
clock framework ref count for the new parent is propagated up to the
clock root during clock resume procedure.
Bug 853986
Change-Id: Iae84ee391e8940fc2d2fcfe47a7a3aae4faa6888
Reviewed-on: http://git-master/r/45712
Reviewed-by: Varun Colbert <vcolbert@nvidia.com>
Tested-by: Varun Colbert <vcolbert@nvidia.com>
| -rw-r--r-- | arch/arm/mach-tegra/tegra3_clocks.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/arm/mach-tegra/tegra3_clocks.c b/arch/arm/mach-tegra/tegra3_clocks.c index 15bd15360bd9..2455a3655e66 100644 --- a/arch/arm/mach-tegra/tegra3_clocks.c +++ b/arch/arm/mach-tegra/tegra3_clocks.c @@ -4444,7 +4444,12 @@ void tegra_clk_resume(void) BUG_ON(!p->refcnt); p->refcnt--; - tegra_clk_emc.parent->refcnt++; + + /* the new parent is enabled by low level code, but ref count + need to be updated up to the root */ + p = tegra_clk_emc.parent; + while (p && ((p->refcnt++) == 0)) + p = p->parent; } tegra_emc_timing_invalidate(); |