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commit2a71de2f73upstream. Commit348f9bb31c("serial: omap: Fix RTS handling") sought to enable auto RTS upon manual RTS assertion and disable it on deassertion. However it seems the latter was done incorrectly, it clears all bits in the Extended Features Register *except* auto RTS. Fixes:348f9bb31c("serial: omap: Fix RTS handling") Cc: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Lukas Wunner <lukas@wunner.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>