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commit7a3d76a0b6upstream. Fix the regression introduced by commitd8c6edfa3f("USB: usblp: don't call usb_set_interface if there's a single alt"), which causes that unsupported protocols can also be set via ioctl when the num_altsetting of the device is 1. Move the check for protocol support to the earlier stage. Fixes:d8c6edfa3f("USB: usblp: don't call usb_set_interface if there's a single alt") Cc: stable <stable@kernel.org> Signed-off-by: Jun Yan <jerrysteve1101@gmail.com> Link: https://lore.kernel.org/r/20241212143852.671889-1-jerrysteve1101@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>