Reading one byte at a time from linux-gpib can be very slow. This change
passes the read count directly to linux-gpib, making large transfers
much faster.
Coverage remained the same at 20.603% when pulling 722bc1154f3f5ff119bb1ab0f07266036325a24e on Duncanla:gpib_fix into 23e5f5ed6e7725a1143e5e417d9b124454e0b457 on hgrecco:master.
Reading one byte at a time from linux-gpib can be very slow. This change passes the read count directly to linux-gpib, making large transfers much faster.