lib/psr: Add a macro with the maximum lenght of i915_edp_psr_status and use it

So every function reading i915_edp_psr_status can allocate a buffer
long enough.

Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/igt_psr.c b/lib/igt_psr.c
index 0ddfb64f..c105bb6e 100644
--- a/lib/igt_psr.c
+++ b/lib/igt_psr.c
@@ -28,7 +28,7 @@
 static bool psr_active(int debugfs_fd, bool check_active)
 {
 	bool active;
-	char buf[512];
+	char buf[PSR_STATUS_MAX_LEN];
 
 	igt_debugfs_simple_read(debugfs_fd, "i915_edp_psr_status", buf,
 				sizeof(buf));