[igt-dev] [PATCH i-g-t] lib: Show other clients when SETMASTER fails

[Chris Wilson]

Currently we only show the clients at DEBUG level which is not
automatically shown for a SKIP. However, failing to SETMASTER is more
often a mistake and we do want to see the other clients. The choice is
at what level to show them? If we want to avoid having extra WARNs in
CI, we should keep them to INFO, but on the hand failing to acquire
SETMASTER is tantamount to failure, so WARN.

References: https://bugs.freedesktop.org/show_bug.cgi?id=110682
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Martin Peres <martin.peres at free.fr>
---
 lib/igt_debugfs.c |  4 ++--
 lib/igt_debugfs.h |  3 ++-
 lib/igt_device.c  | 17 +++++++++++++----
 3 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/lib/igt_debugfs.c b/lib/igt_debugfs.c
index dd229c099..82ce18344 100644
--- a/lib/igt_debugfs.c
+++ b/lib/igt_debugfs.c
@@ -1145,7 +1145,7 @@ int igt_get_stable_obj_count(int driver)
 	return obj_count;
 }
 
-void igt_debugfs_dump(int device, const char *filename)
+void __igt_debugfs_dump(int device, const char *filename, int level)
 {
 	char *contents;
 	int dir;
@@ -1154,6 +1154,6 @@ void igt_debugfs_dump(int device, const char *filename)
 	contents = igt_sysfs_get(dir, filename);
 	close(dir);
 
-	igt_debug("%s:\n%s\n", filename, contents);
+	igt_log(IGT_LOG_DOMAIN, level, "%s:\n%s\n", filename, contents);
 	free(contents);
 }
diff --git a/lib/igt_debugfs.h b/lib/igt_debugfs.h
index f8e57a6bf..52520b3c5 100644
--- a/lib/igt_debugfs.h
+++ b/lib/igt_debugfs.h
@@ -201,6 +201,7 @@ void igt_enable_prefault(void);
  * gem buffer objects
  */
 int igt_get_stable_obj_count(int driver);
-void igt_debugfs_dump(int device, const char *filename);
+void __igt_debugfs_dump(int device, const char *filename, int level);
+#define igt_debugfs_dump(d, f) __igt_debugfs_dump(d, f, IGT_LOG_DEBUG)
 
 #endif /* __IGT_DEBUGFS_H__ */
diff --git a/lib/igt_device.c b/lib/igt_device.c
index 08f39c8b1..9469e5de2 100644
--- a/lib/igt_device.c
+++ b/lib/igt_device.c
@@ -32,13 +32,20 @@ int __igt_device_set_master(int fd)
 	int err;
 
 	err = 0;
-	if (drmIoctl(fd, DRM_IOCTL_SET_MASTER, NULL))
+	if (drmIoctl(fd, DRM_IOCTL_SET_MASTER, NULL)) {
 		err = -errno;
+		igt_assume(err);
+	}
 
 	errno = 0;
 	return err;
 }
 
+static void show_clients(int fd)
+{
+	__igt_debugfs_dump(fd, "clients", IGT_LOG_WARN);
+}
+
 /**
  * igt_device_set_master: Set the device fd to be DRM master
  * @fd: the device
@@ -48,7 +55,7 @@ int __igt_device_set_master(int fd)
 void igt_device_set_master(int fd)
 {
 	if (__igt_device_set_master(fd)) {
-		igt_debugfs_dump(fd, "clients");
+		show_clients(fd);
 		igt_require_f(__igt_device_set_master(fd) == 0,
 			      "Can't become DRM master, "
 			      "please check if no other DRM client is running.\n");
@@ -60,8 +67,10 @@ int __igt_device_drop_master(int fd)
 	int err;
 
 	err = 0;
-	if (drmIoctl(fd, DRM_IOCTL_DROP_MASTER, NULL))
+	if (drmIoctl(fd, DRM_IOCTL_DROP_MASTER, NULL)) {
 		err = -errno;
+		igt_assume(err);
+	}
 
 	errno = 0;
 	return err;
@@ -81,7 +90,7 @@ void igt_device_drop_master(int fd)
 		return;
 
 	if (__igt_device_drop_master(fd)) {
-		igt_debugfs_dump(fd, "clients");
+		show_clients(fd);
 		igt_assert_f(__igt_device_drop_master(fd) == 0,
 			      "Failed to drop DRM master.\n");
 	}
-- 
2.20.1