#if defined(__i386__) || defined(__x86_64__) #include #include #include #include #include "helpers/helpers.h" /* Intel specific MSRs */ #define MSR_IA32_PERF_STATUS 0x198 #define MSR_IA32_MISC_ENABLES 0x1a0 #define MSR_IA32_ENERGY_PERF_BIAS 0x1b0 #define MSR_NEHALEM_TURBO_RATIO_LIMIT 0x1ad /* * read_msr * * Will return 0 on success and -1 on failure. * Possible errno values could be: * EFAULT -If the read/write did not fully complete * EIO -If the CPU does not support MSRs * ENXIO -If the CPU does not exist */ int read_msr(int cpu, unsigned int idx, unsigned long long *val) { int fd; char msr_file_name[64]; sprintf(msr_file_name, "/dev/cpu/%d/msr", cpu); fd = open(msr_file_name, O_RDONLY); if (fd < 0) return -1; if (lseek(fd, idx, SEEK_CUR) == -1) goto err; if (read(fd, val, sizeof *val) != sizeof *val) goto err; close(fd); return 0; err: close(fd); return -1; } /* * write_msr * * Will return 0 on success and -1 on failure. * Possible errno values could be: * EFAULT -If the read/write did not fully complete * EIO -If the CPU does not support MSRs * ENXIO -If the CPU does not exist */ int write_msr(int cpu, unsigned int idx, unsigned long long val) { int fd; char msr_file_name[64]; sprintf(msr_file_name, "/dev/cpu/%d/msr", cpu); fd = open(msr_file_name, O_WRONLY); if (fd < 0) return -1; if (lseek(fd, idx, SEEK_CUR) == -1) goto err; if (write(fd, &val, sizeof val) != sizeof val) goto err; close(fd); return 0; err: close(fd); return -1; } int msr_intel_get_perf_bias(unsigned int cpu) { unsigned long long val; int ret; if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_PERF_BIAS)) return -1; ret = read_msr(cpu, MSR_IA32_ENERGY_PERF_BIAS, &val); if (ret) return ret; return val; } int msr_intel_set_perf_bias(unsigned int cpu, unsigned int val) { int ret; if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_PERF_BIAS)) return -1; ret = write_msr(cpu, MSR_IA32_ENERGY_PERF_BIAS, val); if (ret) return ret; return 0; } unsigned long long msr_intel_get_turbo_ratio(unsigned int cpu) { unsigned long long val; int ret; if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_HAS_TURBO_RATIO)) return -1; ret = read_msr(cpu, MSR_NEHALEM_TURBO_RATIO_LIMIT, &val); if (ret) return ret; return val; } #endif ption value='grep'>log msg
path: root/include/scsi/fcoe_sysfs.h
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authorStanislaw Gruszka <sgruszka@redhat.com>2017-01-29 12:40:52 +0100
committerKalle Valo <kvalo@codeaurora.org>2017-01-31 09:08:52 +0200
commit33e962c8871f015f5c8978384553dddcf5b81b22 (patch)
tree43aff96c2ee21d9e0fa2018457778a4de52053cd /include/scsi/fcoe_sysfs.h
parent575ddce0507789bf9830d089557d2199d2f91865 (diff)
rt2x00: fix clk_get call
clk_get() takes two arguments and might return ERR_PTR(), so we have to nullify pointer on that case, to do not break further call to clk_get_rate(). Reported-by: Felix Fietkau <nbd@nbd.name> Fixes: 34db70b92fae ("rt2x00: add copy of clk for soc devices") Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'include/scsi/fcoe_sysfs.h')