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commite330b9a6bbupstream. of_irq_get[_byname]() return 0 iff irq_create_of_mapping() call fails. Returning both error code and 0 on failure is a sign of a misdesigned API, it makes the failure check unnecessarily complex and error prone. We should rely on the platform IRQ resource in this case, not return 0, especially as 0 can be a valid IRQ resource too... Fixes:aff008ad81("platform_get_irq: Revert to platform_get_resource if of_irq_get fails") Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>