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commitdd218433f2upstream. The devm_memremap() function returns error pointers. It never returns NULL. Fix the check. Fixes:7ca5ce8965("firmware: add Intel Stratix10 service layer driver") Cc: stable@vger.kernel.org Signed-off-by: Wang Ming <machel@vivo.com> Signed-off-by: Dinh Nguyen <dinguyen@kernel.org> Link: https://lore.kernel.org/r/20230727193750.983795-1-dinguyen@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>