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| author |   Magnus Damm <damm@opensource.se> | 2011-11-10 00:44:10 +0100 |
|---|---|---|
| committer |   Rafael J. Wysocki <rjw@sisk.pl> | 2011-11-10 00:44:10 +0100 |
| commit | 24050956e029a9ecff096e1992869ada4492963c (patch) | |
| tree | 096341c4741fcc967645578af0acb277f9754501 /include/linux/pm_runtime.h | |
| parent | ARM: mach-shmobile: sh7372 A3SP no_suspend_console fix (diff) | |
| download | wireguard-linux-24050956e029a9ecff096e1992869ada4492963c.tar.xz wireguard-linux-24050956e029a9ecff096e1992869ada4492963c.zip | |
PM / Clocks: Only disable enabled clocks in pm_clk_suspend()
Refrain from running clk_disable() on clocks that
have not been enabled. A typical case when this can
happen is during Suspend-to-RAM for devices that have
no driver associated with them. In such case the clock
may be in default ACQUIRED state.
Without this patch the sh7372 Mackerel board crashes
in __clk_disable() during Suspend-to-RAM with:
"Trying to disable clock 0xdeadbeef with 0 usecount"
This happens for the CEU device which is added during
boot. The test case has no CEU driver included in the
kernel configuration. Needed for v3.2-rc1.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'include/linux/pm_runtime.h')
0 files changed, 0 insertions, 0 deletions