I2C: mv64xxx: fix error handling for request_irq()
Propagate the error code from request_irq() rather than ignoring it entirely. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk> Acked-by: NMark A. Greer <mgreer@animalcreek.com> Signed-off-by: NWolfram Sang <wsa@the-dreams.de>
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