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net/sunrpc: Fix return value for sysctl sunrpc.transports
commit c09f56b upstream. Fix returning value for sysctl sunrpc.transports. Return error code from sysctl proc_handler function proc_do_xprt instead of number of the written bytes. Otherwise sysctl returns random garbage for this key. Since v1: - Handle negative returned value from memory_read_from_buffer as an error Signed-off-by: Artur Molchanov <arturmolchanov@gmail.com> Cc: stable@vger.kernel.org Signed-off-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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