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Subject[PATCH v2 v3.18-rc4 4/4] drm: sti: Honour O_RDWR during prime-handle-to-fd
Date
Currently the sti drm driver forcible applies O_RDWR when it exports
a prime handle. This is because it was not previously possible for
user requests to create the fd with O_RDWR passed into drivers.

This is a cleanup to remove this code. This change has obvious impact
upon the userspace which must change the flags passed to
DRM_IOCTL_PRIME_HANDLE_TO_FD. However at present only a tiny handful of
developers run this userspace and, if they don't complain, nobody else
will.

Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
---
drivers/gpu/drm/sti/sti_drm_drv.c | 11 +----------
1 file changed, 1 insertion(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/sti/sti_drm_drv.c b/drivers/gpu/drm/sti/sti_drm_drv.c
index 223d93c3a05d..320167e1520a 100644
--- a/drivers/gpu/drm/sti/sti_drm_drv.c
+++ b/drivers/gpu/drm/sti/sti_drm_drv.c
@@ -93,15 +93,6 @@ static const struct file_operations sti_drm_driver_fops = {
.release = drm_release,
};

-static struct dma_buf *sti_drm_gem_prime_export(struct drm_device *dev,
- struct drm_gem_object *obj,
- int flags)
-{
- /* we want to be able to write in mmapped buffer */
- flags |= O_RDWR;
- return drm_gem_prime_export(dev, obj, flags);
-}
-
static struct drm_driver sti_drm_driver = {
.driver_features = DRIVER_HAVE_IRQ | DRIVER_MODESET |
DRIVER_GEM | DRIVER_PRIME,
@@ -119,7 +110,7 @@ static struct drm_driver sti_drm_driver = {

.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
- .gem_prime_export = sti_drm_gem_prime_export,
+ .gem_prime_export = drm_gem_prime_export,
.gem_prime_import = drm_gem_prime_import,
.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
--
1.9.3


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