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drm: Use a const drm_driver for legacy PCI devices

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Now that the legacy PCI support code doesn't need to write to the
drm_driver structure, it can be treated as const through the whole DRM
core, unconditionally. This allows declaring the structure as const in
all drivers, removing one possible attack vector.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Laurent Pinchart
2020-02-21 00:19:22 +02:00
parent 8dbe1b4a15
commit b1dda997a8
4 changed files with 11 additions and 15 deletions
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8
drivers/gpu/drm/drm_pci.c
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@@ -201,7 +201,7 @@ static void drm_pci_agp_init(struct drm_device *dev)
static int drm_get_pci_dev(struct pci_dev *pdev,
const struct pci_device_id *ent,
struct drm_driver *driver)
const struct drm_driver *driver)
{
struct drm_device *dev;
int ret;
@@ -255,7 +255,8 @@ err_free:
*
* Return: 0 on success or a negative error code on failure.
*/
int drm_legacy_pci_init(struct drm_driver *driver, struct pci_driver *pdriver)
int drm_legacy_pci_init(const struct drm_driver *driver,
struct pci_driver *pdriver)
{
struct pci_dev *pdev = NULL;
const struct pci_device_id *pid;
@@ -300,7 +301,8 @@ EXPORT_SYMBOL(drm_legacy_pci_init);
* Unregister a DRM driver shadow-attached through drm_legacy_pci_init(). This
* is deprecated and only used by dri1 drivers.
*/
void drm_legacy_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver)
void drm_legacy_pci_exit(const struct drm_driver *driver,
struct pci_driver *pdriver)
{
struct drm_device *dev, *tmp;