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There are couple of issues with the error return paths in
omap_iommu_attach():
1. omap_iommu_attach() returns NULL or ERR_PTR in case of error,
but omap_iommu_attach_dev() only checks for IS_ERR. Thus a NULL
return value (in case driver_find_device fails) will cause the
kernel to panic when omap_iommu_attach_dev() dereferences the
pointer.
2. A try_module_get() failure returns a valid success value as
returned from iommu_enable().
Both the above issues have been fixed up to return the proper
ERR_PTR.
Signed-off-by: Florian Vaussard <florian.vaussard@epfl.ch>
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
7ee08b9ef2