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[ Upstream commitd8bb447efc] isst_if_probe() uses pci_read_config_dword() that returns PCIBIOS_* codes. The return code is returned from the probe function as is but probe functions should return normal errnos. A proper implementation can be found in drivers/leds/leds-ss4200.c. Convert PCIBIOS_* return codes using pcibios_err_to_errno() into normal errno before returning. Fixes:d3a2358429("platform/x86: ISST: Add Intel Speed Select mmio interface") Signed-off-by: Haotian Zhang <vulab@iscas.ac.cn> Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Link: https://patch.msgid.link/20251117033354.132-1-vulab@iscas.ac.cn Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>