linux-kernel - [PATCH v5 4/8] firmware: arm_scpi: allow firmware with get

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Date:   Wed,  2 Nov 2016 22:52:07 -0600
From:   Sudeep Holla <sudeep.holla@....com>
To:     Neil Armstrong <narmstrong@...libre.com>
Cc:     Sudeep Holla <sudeep.holla@....com>,
        Olof Johansson <olof@...om.net>,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-amlogic@...ts.infradead.org
Subject: [PATCH v5 4/8] firmware: arm_scpi: allow firmware with get_capabilities not implemented

From: Neil Armstrong <narmstrong@...libre.com>

On Amlogic SCPI legacy implementation, the GET_CAPABILITIES command is
not supported, failover by using 0.0.0 version.

Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
[sudeep.holla@....com: changed the subject]
Signed-off-by: Sudeep Holla <sudeep.holla@....com>
---
 drivers/firmware/arm_scpi.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/firmware/arm_scpi.c b/drivers/firmware/arm_scpi.c
index 2982bc7b8c33..902233642bd3 100644
--- a/drivers/firmware/arm_scpi.c
+++ b/drivers/firmware/arm_scpi.c
@@ -783,6 +783,10 @@ static int scpi_init_versions(struct scpi_drvinfo *info)
 		info->protocol_version = le32_to_cpu(caps.protocol_version);
 		info->firmware_version = le32_to_cpu(caps.platform_version);
 	}
+	/* Ignore error if not implemented */
+	if (scpi_info->is_legacy && ret == -EOPNOTSUPP)
+		return 0;
+
 	return ret;
 }
 
-- 
1.9.1