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[ Upstream commit5aac95320d] GPIB secondary addresses have valid values between 0 and 31 inclusive. The Make Secondary Address function MSA, used to form the protocol byte, was using the gpib_address_restrict function erroneously restricting the address range to 0 through 30. Remove the call to gpib_address_restrict and simply trim the address to 5 bits. Fixes:2da03e7e31("staging: gpib: Add user api include files") Signed-off-by: Dave Penkler <dpenkler@gmail.com> Link: https://lore.kernel.org/r/20250520155100.5808-1-dpenkler@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>