[PATCH libdrm 1/4] freedreno: zero is a valid fd number, treat it as such

[Emil Velikov]

Abeit quite unlikely to get hit by this bug here, let just fix it.

v2: Correct conditional (do not call ioctl(DRM_IOCTL_PRIME_HANDLE_TO_FD)
when we already have the fd).
v3: Fix kgsl_pipe.c, suggested by Thierry.

Cc: freedreno at lists.freedesktop.org
Cc: Rob Clark <robdclark at gmail.com>
Signed-off-by: Emil Velikov <emil.l.velikov at gmail.com>
Reviewed-by: Thierry Reding <thierry.reding at gmail.com>
---
 freedreno/freedreno_bo.c   | 6 +++---
 freedreno/kgsl/kgsl_bo.c   | 1 +
 freedreno/kgsl/kgsl_pipe.c | 2 +-
 freedreno/msm/msm_bo.c     | 1 +
 4 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/freedreno/freedreno_bo.c b/freedreno/freedreno_bo.c
index 517a2f8..eec218c 100644
--- a/freedreno/freedreno_bo.c
+++ b/freedreno/freedreno_bo.c
@@ -285,9 +285,9 @@ void fd_bo_del(struct fd_bo *bo)
 	if (!atomic_dec_and_test(&bo->refcnt))
 		return;
 
-	if (bo->fd) {
+	if (bo->fd >= 0) {
 		close(bo->fd);
-		bo->fd = 0;
+		bo->fd = -1;
 	}
 
 	pthread_mutex_lock(&table_lock);
@@ -372,7 +372,7 @@ uint32_t fd_bo_handle(struct fd_bo *bo)
 
 int fd_bo_dmabuf(struct fd_bo *bo)
 {
-	if (!bo->fd) {
+	if (bo->fd < 0) {
 		struct drm_prime_handle req = {
 				.handle = bo->handle,
 				.flags = DRM_CLOEXEC,
diff --git a/freedreno/kgsl/kgsl_bo.c b/freedreno/kgsl/kgsl_bo.c
index 15c3ff5..3407c76 100644
--- a/freedreno/kgsl/kgsl_bo.c
+++ b/freedreno/kgsl/kgsl_bo.c
@@ -168,6 +168,7 @@ drm_private struct fd_bo * kgsl_bo_from_handle(struct fd_device *dev,
 
 	bo = &kgsl_bo->base;
 	bo->funcs = &funcs;
+	bo->fd = -1;
 
 	for (i = 0; i < ARRAY_SIZE(kgsl_bo->list); i++)
 		list_inithead(&kgsl_bo->list[i]);
diff --git a/freedreno/kgsl/kgsl_pipe.c b/freedreno/kgsl/kgsl_pipe.c
index fc76b2b..08c87a6 100644
--- a/freedreno/kgsl/kgsl_pipe.c
+++ b/freedreno/kgsl/kgsl_pipe.c
@@ -101,7 +101,7 @@ static void kgsl_pipe_destroy(struct fd_pipe *pipe)
 	if (kgsl_pipe->drawctxt_id)
 		ioctl(kgsl_pipe->fd, IOCTL_KGSL_DRAWCTXT_DESTROY, &req);
 
-	if (kgsl_pipe->fd)
+	if (kgsl_pipe->fd >= 0)
 		close(kgsl_pipe->fd);
 
 	free(kgsl_pipe);
diff --git a/freedreno/msm/msm_bo.c b/freedreno/msm/msm_bo.c
index fbd82df..3f5b6d0 100644
--- a/freedreno/msm/msm_bo.c
+++ b/freedreno/msm/msm_bo.c
@@ -137,6 +137,7 @@ drm_private struct fd_bo * msm_bo_from_handle(struct fd_device *dev,
 
 	bo = &msm_bo->base;
 	bo->funcs = &funcs;
+	bo->fd = -1;
 
 	for (i = 0; i < ARRAY_SIZE(msm_bo->list); i++)
 		list_inithead(&msm_bo->list[i]);
-- 
2.4.5