drm/i915: Pair va_copy with va_end in i915_error_vprintf

commit 1d2cb9a54abc6e1d239f28f07661366d5662a94a upstream.

Each invocation of va_copy() must be matched by a corresponding
invocation of va_end() in the same function.

This regression has been introduced in

commit e29bb4ebbf000ff9ac081d29784a3331618f012e
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Fri Sep 20 10:20:59 2013 +0100

    drm/i915: Use a temporary va_list for two-pass string handling

Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 354e3e3..eb7af5b 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -146,7 +146,10 @@ static void i915_error_vprintf(struct drm_i915_error_state_buf *e,
                va_list tmp;
 
                va_copy(tmp, args);
-               if (!__i915_error_seek(e, vsnprintf(NULL, 0, f, tmp)))
+               len = vsnprintf(NULL, 0, f, tmp);
+               va_end(tmp);
+
+               if (!__i915_error_seek(e, len))
                        return;
        }