The device always exist, so use it to derive the module name required to
lookup either the debugfs params directory or the sysfs module parameters.
Fixes: 2f5cee33ce55 ("igt/params: use igt_params_set_save for igt_set_module_param*")
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
Cc: Juha-Pekka Heikkila <juhapekka.heikkila@xxxxxxxxx>
---
lib/igt_params.c | 116 +++++++----------------------------------------
1 file changed, 17 insertions(+), 99 deletions(-)
diff --git a/lib/igt_params.c b/lib/igt_params.c
index d8649dfd9..9d9a11c0b 100644
--- a/lib/igt_params.c
+++ b/lib/igt_params.c
@@ -131,117 +131,35 @@ static void igt_params_save(int dir, const char *path, const char *name)
*/
static int __igt_params_open(int device, char **outpath, const char *param)
{
+ drm_version_t version;
int dir, params = -1;
- struct stat buffer;
- char searchname[64];
- char searchpath[PATH_MAX];
- char *foundname, *ctx;
+ char path[PATH_MAX];
+ char name[32];
+
+ memset(&version, 0, sizeof(version));
+ version.name_len = sizeof(name);
+ version.name = name;
+ if (ioctl(device, DRM_IOCTL_VERSION, &version))
+ return -1;
dir = igt_debugfs_dir(device);
if (dir >= 0) {
- int devname;
-
- devname = openat(dir, "name", O_RDONLY);
- igt_require_f(devname >= 0,
- "Driver need to name itself in debugfs!");
-
- read(devname, searchname, sizeof(searchname));
- close(devname);
-
- foundname = strtok_r(searchname, " ", &ctx);
- igt_require_f(foundname,
- "Driver need to name itself in debugfs!");
-
- snprintf(searchpath, PATH_MAX, "%s_params", foundname);
- params = openat(dir, searchpath, O_RDONLY);
-
- if (params >= 0) {
- char *debugfspath = malloc(PATH_MAX);
-
- igt_debugfs_path(device, debugfspath, PATH_MAX);
- if (param != NULL) {
- char filepath[PATH_MAX];
-
- snprintf(filepath, PATH_MAX, "%s/%s",
- debugfspath, param);
-
- if (stat(filepath, &buffer) == 0) {
- if (outpath != NULL)
- *outpath = debugfspath;
- else
- free(debugfspath);
- } else {
- free(debugfspath);
- close(params);
- params = -1;
- }
- } else if (outpath != NULL) {
- /*
- * Caller is responsible to free this.
- */
- *outpath = debugfspath;
- } else {
- free(debugfspath);
- }
- }
+ snprintf(path, PATH_MAX, "%s_params", name);
+ params = openat(dir, path, O_RDONLY);
close(dir);
}
if (params < 0) { /* builtin? */
- drm_version_t version;
- char name[32] = "";
- char path[PATH_MAX];
-
- if (device == -1) {
- /*
- * find default device
- */
- int file, i;
- const char *debugfs_root = igt_debugfs_mount();
-
- igt_assert(debugfs_root);
-
- for (i = 0; i < 63; i++) {
- char testpath[PATH_MAX];
-
- snprintf(searchpath, PATH_MAX,
- "%s/dri/%d/name", debugfs_root, i);
-
- file = open(searchpath, O_RDONLY);
-
- if (file < 0)
- continue;
-
- read(file, searchname, sizeof(searchname));
- close(file);
-
- foundname = strtok_r(searchname, " ", &ctx);
- if (!foundname)
- continue;
-
- snprintf(testpath, PATH_MAX,
- "/sys/module/%s/parameters",
- foundname);
-
- if (stat(testpath, &buffer) == 0 &&
- S_ISDIR(buffer.st_mode)) {
- snprintf(name, sizeof(name), "%s",
- foundname);
- break;
- }
- }
- } else {
- memset(&version, 0, sizeof(version));
- version.name_len = sizeof(name);
- version.name = name;
- ioctl(device, DRM_IOCTL_VERSION, &version);
- }
snprintf(path, sizeof(path), "/sys/module/%s/parameters", name);
params = open(path, O_RDONLY);
- if (params >= 0 && outpath)
- *outpath = strdup(path);
}
+ /*
+ * Caller is responsible to free this.
+ */
+ if (params >= 0 && outpath)
+ *outpath = strdup(path);
+
return params;
}
--
2.26.2
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