On an attempt to resolve the issue of mysteriously failing updates of sysfs entries representing engine preempt timeout values, add debug messages to error paths of involved library functions.
Link: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/6268 Signed-off-by: Janusz Krzysztofik <janusz.krzyszto...@linux.intel.com> --- lib/i915/gem_engine_topology.c | 10 +++++----- lib/igt_sysfs.c | 4 ++-- 2 files changed, 7 insertions(+), 7 deletions(-) diff --git a/lib/i915/gem_engine_topology.c b/lib/i915/gem_engine_topology.c index afb576afb2..ac9e8e9b1b 100644 --- a/lib/i915/gem_engine_topology.c +++ b/lib/i915/gem_engine_topology.c @@ -454,12 +454,12 @@ static int __open_primary(int dir) int len; fd = openat(dir, "dev", O_RDONLY); - if (fd < 0) + if (igt_debug_on(fd < 0)) return dir; len = read(fd, buf, sizeof(buf) - 1); close(fd); - if (len <= 0) + if (igt_debug_on(len <= 0)) return dir; buf[len] = '\0'; @@ -467,7 +467,7 @@ static int __open_primary(int dir) if (minor < 64) return dir; - if (readlinkat(dir, "device", target, sizeof(target)) < 0) + if (igt_debug_on(readlinkat(dir, "device", target, sizeof(target)) < 0)) return dir; fd = openat(dir, "..", O_RDONLY); @@ -517,7 +517,7 @@ static FILE *__open_attr(int dir, const char *mode, ...) dir = reopen(dir, O_RDWR); file = fdopen(dir, mode); - if (!file) { + if (igt_debug_on(!file)) { close(dir); return NULL; } @@ -554,7 +554,7 @@ int gem_engine_property_printf(int i915, const char *engine, const char *attr, file = __open_attr(igt_sysfs_open(i915), "w", "engine", engine, attr, NULL); - if (!file) + if (igt_debug_on(!file)) return -1; va_start(ap, fmt); diff --git a/lib/igt_sysfs.c b/lib/igt_sysfs.c index ffeec1ca21..7826d00efc 100644 --- a/lib/igt_sysfs.c +++ b/lib/igt_sysfs.c @@ -186,7 +186,7 @@ char *igt_sysfs_path(int device, char *path, int pathlen) snprintf(path, pathlen, "/sys/dev/char/%d:%d", major(st.st_rdev), minor(st.st_rdev)); - if (access(path, F_OK)) + if (igt_debug_on(access(path, F_OK))) return NULL; return path; @@ -206,7 +206,7 @@ int igt_sysfs_open(int device) { char path[80]; - if (!igt_sysfs_path(device, path, sizeof(path))) + if (igt_debug_on(!igt_sysfs_path(device, path, sizeof(path)))) return -1; return open(path, O_RDONLY); -- 2.45.2
