[Skiboot] [PATCH v2 11/11] astbmc: Fail SFC init if SIO is unavailable

[Andrew Jeffery]

If SuperIO is unavailable then the driver cannot perform accesses on
which it currently depends. Test for SuperIO availability during
initialsation and bail out immediately if it is absent.

Signed-off-by: Andrew Jeffery <andrew at aj.id.au>
---
 hw/ast-bmc/ast-sf-ctrl.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/hw/ast-bmc/ast-sf-ctrl.c b/hw/ast-bmc/ast-sf-ctrl.c
index 32fc63ae33d6..839af376d4de 100644
--- a/hw/ast-bmc/ast-sf-ctrl.c
+++ b/hw/ast-bmc/ast-sf-ctrl.c
@@ -950,6 +950,9 @@ int ast_sf_open(uint8_t type, struct spi_flash_ctrl **ctrl)
 	uint32_t hicr7;
 #endif /* __SKIBOOT__ */
 
+	if (!ast_sio_is_enabled())
+		return -ENODEV;
+
 	if (type != AST_SF_TYPE_PNOR && type != AST_SF_TYPE_BMC
 	    && type != AST_SF_TYPE_MEM)
 		return -EINVAL;
-- 
2.17.1