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Using plain echo to set the "force" connector attribute fails with -EINVAL, because echo appends a newline to the output. Replace strcmp with sysfs_streq to also accept strings that end with a newline. v2: use sysfs_streq instead of stripping trailing whitespace Signed-off-by: Michael Tretter <m.tretter@pengutronix.de> Reviewed-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20170817104307.17124-1-m.tretter@pengutronix.de