#include #include #include #include #include #include #include #include #include "irq.h" #include "str.h" #include "die.h" int device_irq_number(const char *ifname) { int irq = 0; char buff[128], sysname[128]; FILE *fp; if (!strncmp("lo", ifname, strlen("lo"))) return 0; slprintf(sysname, sizeof(sysname), "/sys/class/net/%s/device/irq", ifname); fp = fopen(sysname, "r"); if (!fp) return -ENOENT; memset(buff, 0, sizeof(buff)); if (fgets(buff, sizeof(buff), fp) != NULL) { buff[sizeof(buff) - 1] = 0; irq = atoi(buff); } fclose(fp); return irq; } static char nic_irq_affinity_list[128]; static bool nic_irq_stored = false; static int nic_irq = -1; static void device_save_irq_affinity_list(void) { int ret, fd; char file[128]; bug_on(nic_irq_stored); slprintf(file, sizeof(file), "/proc/irq/%d/smp_affinity_list", nic_irq); fd = open(file, O_RDONLY); if (fd < 0) return; memset(nic_irq_affinity_list, 0, sizeof(nic_irq_affinity_list)); ret = read(fd, nic_irq_affinity_list, sizeof(nic_irq_affinity_list)); if (ret < 0) panic("Cannot store NIC IRQ affinity!\n"); close(fd); nic_irq_stored = true; } void device_restore_irq_affinity_list(void) { int ret, fd; char file[128]; if (!nic_irq_stored) return; bug_on(nic_irq == -1); slprintf(file, sizeof(file), "/proc/irq/%d/smp_affinity_list", nic_irq); fd = open(file, O_WRONLY); if (fd < 0) return; ret = write(fd, nic_irq_affinity_list, sizeof(nic_irq_affinity_list)); if (ret < 0) panic("Cannot restore NIC IRQ affinity!\n"); close(fd); } int device_set_irq_affinity_list(int irq, unsigned long from, unsigned long to) { int ret, fd; char file[128], list[64]; if (unlikely(irq == 0)) return 0; if (!nic_irq_stored) { nic_irq = irq; device_save_irq_affinity_list(); } slprintf(file, sizeof(file), "/proc/irq/%d/smp_affinity_list", irq); slprintf(list, sizeof(list), "%lu-%lu\n", from, to); fd = open(file, O_WRONLY); if (fd < 0) return -ENOENT; ret = write(fd, list, strlen(list)); close(fd); return ret; } int device_set_irq_affinity(int irq, unsigned long cpu) { return device_set_irq_affinity_list(irq, cpu, cpu); } >diff

path: root/tools/perf/util/cloexec.c

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author	Stanislaw Gruszka <sgruszka@redhat.com>	2017-01-29 12:40:52 +0100
committer	Kalle Valo <kvalo@codeaurora.org>	2017-01-31 09:08:52 +0200
commit	33e962c8871f015f5c8978384553dddcf5b81b22 (patch)
tree	43aff96c2ee21d9e0fa2018457778a4de52053cd /tools/perf/Documentation/perf.txt
parent	575ddce0507789bf9830d089557d2199d2f91865 (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 'tools/perf/Documentation/perf.txt')