https://github.com/torvalds/linux
Revision 8997b185119966c62c6e95e7b010b4060407e358 authored by Srivatsa S. Bhat on 28 April 2014, 18:54:58 UTC, committed by Rafael J. Wysocki on 28 April 2014, 23:22:54 UTC
During frequency transitions, the cpufreq core takes the responsibility of invoking cpufreq_freq_transition_begin() and cpufreq_freq_transition_end() for those cpufreq drivers that define the ->target_index callback but don't set the ASYNC_NOTIFICATION flag. The powernow-k7 cpufreq driver falls under this category, but this driver was invoking the _begin() and _end() APIs itself around frequency transitions, which led to double invocation of the _begin() API. The _begin API makes contending callers wait until the previous invocation is complete. Hence, the powernow-k7 driver ended up waiting on itself, leading to system hangs during boot. Fix this by removing the calls to the _begin() and _end() APIs from the powernow-k7 driver, since they rightly belong to the cpufreq core. Fixes: 12478cf0c55e (cpufreq: Make sure frequency transitions are serialized) Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
1 parent 3221e55
Tip revision: 8997b185119966c62c6e95e7b010b4060407e358 authored by Srivatsa S. Bhat on 28 April 2014, 18:54:58 UTC
cpufreq: powernow-k7: Fix double invocation of cpufreq_freq_transition_begin/end
cpufreq: powernow-k7: Fix double invocation of cpufreq_freq_transition_begin/end
Tip revision: 8997b18
| File | Mode | Size |
|---|---|---|
| Kconfig | -rw-r--r-- | 6.4 KB |
| Makefile | -rw-r--r-- | 3.4 KB |
| ac97.c | -rw-r--r-- | 12.1 KB |
| bells.c | -rw-r--r-- | 11.2 KB |
| dma.c | -rw-r--r-- | 11.0 KB |
| dma.h | -rw-r--r-- | 1005 bytes |
| dmaengine.c | -rw-r--r-- | 2.5 KB |
| goni_wm8994.c | -rw-r--r-- | 7.5 KB |
| h1940_uda1380.c | -rw-r--r-- | 6.3 KB |
| i2s-regs.h | -rw-r--r-- | 4.5 KB |
| i2s.c | -rw-r--r-- | 30.8 KB |
| i2s.h | -rw-r--r-- | 609 bytes |
| idma.c | -rw-r--r-- | 9.7 KB |
| idma.h | -rw-r--r-- | 704 bytes |
| jive_wm8750.c | -rw-r--r-- | 4.1 KB |
| littlemill.c | -rw-r--r-- | 7.9 KB |
| ln2440sbc_alc650.c | -rw-r--r-- | 1.7 KB |
| lowland.c | -rw-r--r-- | 5.3 KB |
| neo1973_wm8753.c | -rw-r--r-- | 10.7 KB |
| pcm.c | -rw-r--r-- | 16.3 KB |
| pcm.h | -rw-r--r-- | 392 bytes |
| regs-ac97.h | -rw-r--r-- | 2.3 KB |
| regs-i2s-v2.h | -rw-r--r-- | 4.2 KB |
| regs-iis.h | -rw-r--r-- | 2.2 KB |
| rx1950_uda1380.c | -rw-r--r-- | 7.0 KB |
| s3c-i2s-v2.c | -rw-r--r-- | 17.7 KB |
| s3c-i2s-v2.h | -rw-r--r-- | 3.2 KB |
| s3c2412-i2s.c | -rw-r--r-- | 5.3 KB |
| s3c2412-i2s.h | -rw-r--r-- | 871 bytes |
| s3c24xx-i2s.c | -rw-r--r-- | 12.9 KB |
| s3c24xx-i2s.h | -rw-r--r-- | 950 bytes |
| s3c24xx_simtec.c | -rw-r--r-- | 9.1 KB |
| s3c24xx_simtec.h | -rw-r--r-- | 655 bytes |
| s3c24xx_simtec_hermes.c | -rw-r--r-- | 3.3 KB |
| s3c24xx_simtec_tlv320aic23.c | -rw-r--r-- | 3.0 KB |
| s3c24xx_uda134x.c | -rw-r--r-- | 9.0 KB |
| smartq_wm8987.c | -rw-r--r-- | 6.7 KB |
| smdk2443_wm9710.c | -rw-r--r-- | 1.7 KB |
| smdk_spdif.c | -rw-r--r-- | 5.1 KB |
| smdk_wm8580.c | -rw-r--r-- | 6.0 KB |
| smdk_wm8580pcm.c | -rw-r--r-- | 4.8 KB |
| smdk_wm8994.c | -rw-r--r-- | 5.7 KB |
| smdk_wm8994pcm.c | -rw-r--r-- | 4.0 KB |
| smdk_wm9713.c | -rw-r--r-- | 2.6 KB |
| spdif.c | -rw-r--r-- | 12.0 KB |
| spdif.h | -rw-r--r-- | 553 bytes |
| speyside.c | -rw-r--r-- | 8.7 KB |
| tobermory.c | -rw-r--r-- | 5.7 KB |
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