linux-kernel - [PATCH v3 1/2] soc: microchip: mpfs: handle failed system service requests

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Date:   Wed, 23 Nov 2022 17:56:51 +0000
From:   Conor Dooley <conor@...nel.org>
To:     Conor Dooley <conor.dooley@...rochip.com>,
        Jassi Brar <jassisinghbrar@...il.com>
Cc:     Daire McNamara <daire.mcnamara@...rochip.com>,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v3 1/2] soc: microchip: mpfs: handle failed system service requests

From: Conor Dooley <conor.dooley@...rochip.com>

If a service request fails, a non-zero, per-service error code will be
set. Since the individual service drivers may wish to handle things
differently, there's little point trying to do anything intelligent in
the system controller driver. Let the caller know that things went wrong
& leave the details of handling the error to it.

Fixes: d0054a470c33 ("soc: add microchip polarfire soc system controller")
Signed-off-by: Conor Dooley <conor.dooley@...rochip.com>
---
 drivers/soc/microchip/mpfs-sys-controller.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/soc/microchip/mpfs-sys-controller.c b/drivers/soc/microchip/mpfs-sys-controller.c
index 6e20207b5756..539fc24b397d 100644
--- a/drivers/soc/microchip/mpfs-sys-controller.c
+++ b/drivers/soc/microchip/mpfs-sys-controller.c
@@ -52,6 +52,12 @@ int mpfs_blocking_transaction(struct mpfs_sys_controller *sys_controller, struct
 
 	mutex_unlock(&transaction_lock);
 
+	if (ret)
+		return ret;
+
+	if (msg->response->resp_status)
+		ret = -EIO;
+
 	return ret;
 }
 EXPORT_SYMBOL(mpfs_blocking_transaction);
-- 
2.38.1