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author | Ben Dooks <ben-linux@fluff.org> | 2008-10-21 13:07:10 (GMT) |
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committer | Ben Dooks <ben-linux@fluff.org> | 2008-12-15 21:46:22 (GMT) |
commit | cec444b79073e7d6ef35ced5ef63c3fd83d9b9a7 (patch) | |
tree | b366e0f675aa2cdbfc4fbea20dba4e9c2526e309 /arch/arm/plat-s3c/clock.c | |
parent | 93b458858f6d40650513f63feef0b350eff4845f (diff) | |
download | linux-fsl-qoriq-cec444b79073e7d6ef35ced5ef63c3fd83d9b9a7.tar.xz |
[ARM] S3C: BUG_ON() if clock has already been registered
Add a simple check when registering a clock on whether
the clock has already been added to the list.
Any attempt to re-register a clock will cause the
clock list to be come looped and thus produces silent
failures when looking up clocks.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Diffstat (limited to 'arch/arm/plat-s3c/clock.c')
-rw-r--r-- | arch/arm/plat-s3c/clock.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm/plat-s3c/clock.c b/arch/arm/plat-s3c/clock.c index 35249b5..da7ac07 100644 --- a/arch/arm/plat-s3c/clock.c +++ b/arch/arm/plat-s3c/clock.c @@ -304,6 +304,9 @@ int s3c24xx_register_clock(struct clk *clk) /* add to the list of available clocks */ + /* Quick check to see if this clock has already been registered. */ + BUG_ON(clk->list.prev != clk->list.next); + spin_lock(&clocks_lock); list_add(&clk->list, &clocks); spin_unlock(&clocks_lock); |