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fsi: core: Fix return of error values on failures
[ Upstream commit 9108109 ] Currently the cfam_read and cfam_write functions return the provided number of bytes given in the count parameter and not the error return code in variable rc, hence all failures of read/writes are being silently ignored. Fix this by returning the error code in rc. Addresses-Coverity: ("Unused value") Fixes: d1dcd67 ("fsi: Add cfam char devices") Signed-off-by: Colin Ian King <colin.king@canonical.com> Reviewed-by: Jeremy Kerr <jk@ozlabs.org> Link: https://lore.kernel.org/r/20210603122812.83587-1-colin.king@canonical.com Signed-off-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Sasha Levin <sashal@kernel.org>
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