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Use the scoped guard infrastructure which unlocks a mutex automatically when the guard goes out of scope, instead of explicit lock and unlock. This simplifies the code and control flow in rtl9300_i2c_smbus_xfer and removes the need of using goto in error cases to unlock before returning. Signed-off-by: Jonas Jelonek <jelonek.jonas@gmail.com> Reviewed-by: Chris Packham <chris.packham@alliedtelesis.co.nz> Tested-by: Chris Packham <chris.packham@alliedtelesis.co.nz> # On RTL9302C based board Tested-by: Markus Stockhausen <markus.stockhausen@gmx.de> Signed-off-by: Andi Shyti <andi.shyti@kernel.org> Link: https://lore.kernel.org/r/20250927101931.71575-8-jelonek.jonas@gmail.com