drm_dev_set_unique() formats its parameter using kvasprintf() but many of its callers directly pass dev_name(dev) as printf format string, without any format parameter. This can cause some issues when the device name contains '%' characters.
To avoid any potential issue, always use "%s" when using drm_dev_set_unique() with dev_name().
Signed-off-by: Nicolas Iooss nicolas.iooss_linux@m4x.org --- drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c | 2 +- drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c | 2 +- drivers/gpu/drm/tegra/drm.c | 2 +- drivers/gpu/drm/vc4/vc4_drv.c | 2 +- include/drm/drmP.h | 1 + 5 files changed, 5 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c index 244df0a440b7..0d720d3a7ee0 100644 --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c @@ -733,7 +733,7 @@ static int atmel_hlcdc_dc_drm_probe(struct platform_device *pdev) if (!ddev) return -ENOMEM;
- ret = drm_dev_set_unique(ddev, dev_name(ddev->dev)); + ret = drm_dev_set_unique(ddev, "%s", dev_name(ddev->dev)); if (ret) goto err_unref;
diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c index 1930234ba5f1..947d75f59881 100644 --- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c +++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c @@ -363,7 +363,7 @@ static int fsl_dcu_drm_probe(struct platform_device *pdev) fsl_dev->np = dev->of_node; drm->dev_private = fsl_dev; dev_set_drvdata(dev, fsl_dev); - drm_dev_set_unique(drm, dev_name(dev)); + drm_dev_set_unique(drm, "%s", dev_name(dev));
ret = drm_dev_register(drm, 0); if (ret < 0) diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c index 159ef515cab1..b278f60f4376 100644 --- a/drivers/gpu/drm/tegra/drm.c +++ b/drivers/gpu/drm/tegra/drm.c @@ -991,7 +991,7 @@ static int host1x_drm_probe(struct host1x_device *dev) if (!drm) return -ENOMEM;
- drm_dev_set_unique(drm, dev_name(&dev->dev)); + drm_dev_set_unique(drm, "%s", dev_name(&dev->dev)); dev_set_drvdata(&dev->dev, drm);
err = drm_dev_register(drm, 0); diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c index 6e730605edcc..c90a451aaa79 100644 --- a/drivers/gpu/drm/vc4/vc4_drv.c +++ b/drivers/gpu/drm/vc4/vc4_drv.c @@ -168,7 +168,7 @@ static int vc4_drm_bind(struct device *dev) vc4->dev = drm; drm->dev_private = vc4;
- drm_dev_set_unique(drm, dev_name(dev)); + drm_dev_set_unique(drm, "%s", dev_name(dev));
drm_mode_config_init(drm); if (ret) diff --git a/include/drm/drmP.h b/include/drm/drmP.h index 0b921ae06cd8..995fb96cb740 100644 --- a/include/drm/drmP.h +++ b/include/drm/drmP.h @@ -1049,6 +1049,7 @@ void drm_dev_ref(struct drm_device *dev); void drm_dev_unref(struct drm_device *dev); int drm_dev_register(struct drm_device *dev, unsigned long flags); void drm_dev_unregister(struct drm_device *dev); +__printf(2, 3) int drm_dev_set_unique(struct drm_device *dev, const char *fmt, ...);
struct drm_minor *drm_minor_acquire(unsigned int minor_id);