[PATCH v1] firmware: microchip: fix UL_IAP lock check in mpfs_auto_update_state()
Valentina Fernandez
valentina.fernandezalanis at microchip.com
Mon Nov 18 07:53:54 PST 2024
To verify that Auto Update is possible, the mpfs_auto_update_state()
function performs a "Query Security Service Request" to the system
controller.
Previously, the check was performed on the first element of the
response message, which was accessed using a 32-bit pointer. This
caused the bitwise operation to reference incorrect data, as the
response should be inspected at the byte level. Fixed this by casting
the response to a u8 * pointer, ensuring the check correctly inspects
the appropriate byte of the response message.
Additionally, rename "UL_Auto Update" to "UL_IAP" to match the
PolarFire Family System Services User Guide.
Signed-off-by: Valentina Fernandez <valentina.fernandezalanis at microchip.com>
---
drivers/firmware/microchip/mpfs-auto-update.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/firmware/microchip/mpfs-auto-update.c b/drivers/firmware/microchip/mpfs-auto-update.c
index 0f7ec8848202..df1d69bdc1d7 100644
--- a/drivers/firmware/microchip/mpfs-auto-update.c
+++ b/drivers/firmware/microchip/mpfs-auto-update.c
@@ -402,10 +402,10 @@ static int mpfs_auto_update_available(struct mpfs_auto_update_priv *priv)
return -EIO;
/*
- * Bit 5 of byte 1 is "UL_Auto Update" & if it is set, Auto Update is
+ * Bit 5 of byte 1 is "UL_IAP" & if it is set, Auto Update is
* not possible.
*/
- if (response_msg[1] & AUTO_UPDATE_FEATURE_ENABLED)
+ if ((((u8 *)response_msg)[1] & AUTO_UPDATE_FEATURE_ENABLED))
return -EPERM;
return 0;
--
2.34.1
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