lib/i915/gem_context: Help static analysis with execution flow

If an igt_ioctl fails, errno is set to non-zero, and static analysis
doesn't quite get it. Add an igt_assume() to help.

v2: Braces on both branches of an if (Chris)

Signed-off-by: Petri Latvala <petri.latvala@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Michał Winiarski <michal.winiarski@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 5 insertions, 3 deletions

diff --git a/lib/i915/gem_context.c b/lib/i915/gem_context.c
index 669bd318..16004685 100644
--- a/lib/i915/gem_context.c
+++ b/lib/i915/gem_context.c
@@ -80,10 +80,12 @@ int __gem_context_create(int fd, uint32_t *ctx_id)
        int err = 0;
 
        memset(&create, 0, sizeof(create));
-       if (igt_ioctl(fd, DRM_IOCTL_I915_GEM_CONTEXT_CREATE, &create) == 0)
+       if (igt_ioctl(fd, DRM_IOCTL_I915_GEM_CONTEXT_CREATE, &create) == 0) {
                *ctx_id = create.ctx_id;
-       else
-               err = -errno;
+       } else {
+	       err = -errno;
+	       igt_assume(err != 0);
+       }
 
        errno = 0;
        return err;