media: saa7146: fix error return from master_xfer
Returning -1 (-EPERM) is not appropriate here, go with -EIO. Signed-off-by: NPeter Rosin <peda@axentia.se> Signed-off-by: NHans Verkuil <hansverk@cisco.com> Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>
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