From: Grant Likely Subject: [PATCH] of/device: Protect against binding of_platform_drivers to non-OF devices Date: Thu, 22 Jul 2010 16:24:07 -0600 Message-ID: <20100722222407.21517.46568.stgit@angua> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: devicetree-discuss-bounces+gldd-devicetree-discuss=m.gmane.org-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org Errors-To: devicetree-discuss-bounces+gldd-devicetree-discuss=m.gmane.org-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org To: devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org, Greg Kroah-Hartman , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: devicetree@vger.kernel.org There is an unlikely chance of this situation is occurring, but it is easy to protect against. If a matching entry cannot be found in the of_match_table, then don't bind the driver. Signed-off-by: Grant Likely --- drivers/of/platform.c | 7 ++++++- 1 files changed, 6 insertions(+), 1 deletions(-) diff --git a/drivers/of/platform.c b/drivers/of/platform.c index 712dfd8..f3f1ec8 100644 --- a/drivers/of/platform.c +++ b/drivers/of/platform.c @@ -30,8 +30,13 @@ static int platform_driver_probe_shim(struct platform_device *pdev) pdrv = container_of(pdev->dev.driver, struct platform_driver, driver); ofpdrv = container_of(pdrv, struct of_platform_driver, platform_driver); + + /* There is an unlikely chance that an of_platform driver might match + * on a non-OF platform device. If so, then of_match_device() will + * come up empty. Return -EINVAL in this case so other drivers get + * the chance to bind. */ match = of_match_device(pdev->dev.driver->of_match_table, &pdev->dev); - return ofpdrv->probe(pdev, match); + return match ? ofpdrv->probe(pdev, match) : -EINVAL; } static void platform_driver_shutdown_shim(struct platform_device *pdev)