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[ Upstream commit 5d08633e5f6564b60f1cbe09af3af40a74d66431 ]
The ibm,get-system-parameter RTAS function may return -2 or 990x,
which indicate that the caller should try again.
lparcfg's parse_system_parameter_string() ignores this, making it
possible to intermittently report incorrect SPLPAR characteristics.
Move the RTAS call into a coventional rtas_busy_delay()-based loop.
Signed-off-by: Nathan Lynch <nathanl@linux.ibm.com>
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20230125-b4-powerpc-rtas-queue-v3-4-26929c8cce78@linux.ibm.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
d8ca498591