[Mesa-stable] [PATCH] pipe_loader_sw: Fix fd leak when instantiated via pipe_loader_sw_probe_kms

[Hans de Goede]

Make pipe_loader_sw_probe_kms take ownership of the passed in fd,
like pipe_loader_drm_probe_fd does.

The only caller is dri_kms_init_screen which passes in a dupped fd,
just like dri2_init_screen passes in a dupped fd to
pipe_loader_drm_probe_fd.

Signed-off-by: Hans de Goede <hdegoede at redhat.com>
Reviewed-by: Emil Velikov <emil.velikov at collabora.com>
(cherry picked from commit 459cc94507071eec18b746f57a4ec82578a38b54)
---
 src/gallium/auxiliary/pipe-loader/pipe_loader_sw.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/gallium/auxiliary/pipe-loader/pipe_loader_sw.c b/src/gallium/auxiliary/pipe-loader/pipe_loader_sw.c
index c8e1f13..e7fa974 100644
--- a/src/gallium/auxiliary/pipe-loader/pipe_loader_sw.c
+++ b/src/gallium/auxiliary/pipe-loader/pipe_loader_sw.c
@@ -45,6 +45,7 @@ struct pipe_loader_sw_device {
    struct util_dl_library *lib;
 #endif
    struct sw_winsys *ws;
+   int fd;
 };
 
 #define pipe_loader_sw_device(dev) ((struct pipe_loader_sw_device *)dev)
@@ -92,6 +93,7 @@ pipe_loader_sw_probe_init_common(struct pipe_loader_sw_device *sdev)
    sdev->base.type = PIPE_LOADER_DEVICE_SOFTWARE;
    sdev->base.driver_name = "swrast";
    sdev->base.ops = &pipe_loader_sw_ops;
+   sdev->fd = -1;
 
 #ifdef GALLIUM_STATIC_TARGETS
    sdev->dd = &driver_descriptors;
@@ -169,6 +171,8 @@ pipe_loader_sw_probe_kms(struct pipe_loader_device **devs, int fd)
    if (!pipe_loader_sw_probe_init_common(sdev))
       goto fail;
 
+   sdev->fd = fd;
+
    for (i = 0; sdev->dd->winsys[i].name; i++) {
       if (strcmp(sdev->dd->winsys[i].name, "kms_dri") == 0) {
          sdev->ws = sdev->dd->winsys[i].create_winsys(fd);
@@ -273,6 +277,9 @@ pipe_loader_sw_release(struct pipe_loader_device **dev)
       util_dl_close(sdev->lib);
 #endif
 
+   if (sdev->fd != -1)
+      close(sdev->fd);
+
    FREE(sdev);
    *dev = NULL;
 }
-- 
2.9.3