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of/device: Protect against binding of_platform_drivers to non-OF devices

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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 <grant.likely@secretlab.ca>
This commit is contained in:
Grant Likely 2010-07-22 10:36:28 -06:00
parent 2959604296
commit c1b6d380b7
1 changed files with 6 additions and 1 deletions
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7
drivers/of/platform.c
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@ -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)