diff mbox series

[08/12] smartpqi: fix byte aligned writew for ARM servers

Message ID 20230428153712.297638-9-don.brace@microchip.com
State New
Headers show
Series smartpqi updates | expand

Commit Message

Don Brace April 28, 2023, 3:37 p.m. UTC 
Correct OOPs on ARM servers during driver init.

Driver attempts to update FW with max_feature_supported value
using a writew() kernel call using a byte aligned address.

This fails on some ARM systems.

Change the writew() to two writeb() calls to update
this value.

Reviewed-by: Scott Benesh <scott.benesh@microchip.com>
Reviewed-by: Scott Teel <scott.teel@microchip.com>
Reviewed-by: Mike McGowen <mike.mcgowen@microchip.com>
Signed-off-by: Don Brace <don.brace@microchip.com>
---
 drivers/scsi/smartpqi/smartpqi_init.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c
index 19a97bbf89b5..d3d4fc90dcae 100644
--- a/drivers/scsi/smartpqi/smartpqi_init.c
+++ b/drivers/scsi/smartpqi/smartpqi_init.c
@@ -7718,8 +7718,8 @@  static int pqi_enable_firmware_features(struct pqi_ctrl_info *ctrl_info,
 			features_requested_iomem_addr +
 			(le16_to_cpu(firmware_features->num_elements) * 2) +
 			sizeof(__le16);
-		writew(PQI_FIRMWARE_FEATURE_MAXIMUM,
-			host_max_known_feature_iomem_addr);
+		writeb(PQI_FIRMWARE_FEATURE_MAXIMUM & 0xFF, host_max_known_feature_iomem_addr);
+		writeb((PQI_FIRMWARE_FEATURE_MAXIMUM & 0xFF00) >> 8, host_max_known_feature_iomem_addr + 1);
 	}
 
 	return pqi_config_table_update(ctrl_info,