/* * uledmon.c * * This program creates a new userspace LED class device and monitors it. A * timestamp and brightness value is printed each time the brightness changes. * * Usage: uledmon * * is the name of the LED class device to be created. Pressing * CTRL+C will exit. */ #include #include #include #include #include #include int main(int argc, char const *argv[]) { struct uleds_user_dev uleds_dev; int fd, ret; int brightness; struct timespec ts; if (argc != 2) { fprintf(stderr, "Requires argument\n"); return 1; } strncpy(uleds_dev.name, argv[1], LED_MAX_NAME_SIZE); uleds_dev.max_brightness = 100; fd = open("/dev/uleds", O_RDWR); if (fd == -1) { perror("Failed to open /dev/uleds"); return 1; } ret = write(fd, &uleds_dev, sizeof(uleds_dev)); if (ret == -1) { perror("Failed to write to /dev/uleds"); close(fd); return 1; } while (1) { ret = read(fd, &brightness, sizeof(brightness)); if (ret == -1) { perror("Failed to read from /dev/uleds"); close(fd); return 1; } clock_gettime(CLOCK_MONOTONIC, &ts); printf("[%ld.%09ld] %u\n", ts.tv_sec, ts.tv_nsec, brightness); } close(fd); return 0; } t-rx-pump-back'>packet-rx-pump-back net-next plumbingsTobias Klauser
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authorDavid S. Miller <davem@davemloft.net>2017-02-02 21:27:05 -0500
committerDavid S. Miller <davem@davemloft.net>2017-02-02 21:27:05 -0500
commit2372bcda5e681bc85d57a3604265155e1a4c040b (patch)
tree177c454b09676bb54648883037b2d66c40bbdf74
parent6d04dfc8966019b8b0977b2cb942351f13d2b178 (diff)
parent770f82253dbd7e6892a88018f2f6cd395f48d214 (diff)
Merge branch 'mlx4-queue-reinit'
Martin KaFai Lau says: ==================== mlx4: Misc bug fixes after reinitializing queues This patchset fixes misc bugs after reinitializing queues (e.g. by ethtool -L). v2: * Add another fix to mem leak in tx_ring[t] and tx_cq[t] * In mlx4_en_try_alloc_resources(), move all xdp_prog logic after calling mlx4_en_alloc_resources() ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
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