linux-kernel - [PATCH 2/4] hvc_dcc: don't ignore errors during initialization

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Date:	Tue, 30 Jun 2015 16:23:05 -0500
From:	Timur Tabi <timur@...eaurora.org>
To:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Shanker Donthineni <shankerd@...eaurora.org>,
	awallis@...eaurora.org, abhimany@...eaurora.org,
	will.deacon@....com, sboyd@...eaurora.org,
	Vipul Gandhi <vgandhi@...eaurora.org>
Subject: [PATCH 2/4] hvc_dcc: don't ignore errors during initialization

hvc_instantiate() and hvc_alloc() return errors if they fail, so don't
ignore them.

Signed-off-by: Timur Tabi <timur@...eaurora.org>
---
 drivers/tty/hvc/hvc_dcc.c | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/drivers/tty/hvc/hvc_dcc.c b/drivers/tty/hvc/hvc_dcc.c
index 33657dc..f8b8cf2 100644
--- a/drivers/tty/hvc/hvc_dcc.c
+++ b/drivers/tty/hvc/hvc_dcc.c
@@ -225,20 +225,29 @@ static const struct hv_ops hvc_dcc_get_put_ops = {
 
 static int __init hvc_dcc_console_init(void)
 {
+	int ret;
+
+	/* This always runs on boot core */
 	if (!hvc_dcc_check())
 		return -ENODEV;
 
-	hvc_instantiate(0, 0, &hvc_dcc_get_put_ops);
-	return 0;
+	/* Returns -1 if error */
+	ret = hvc_instantiate(0, 0, &hvc_dcc_get_put_ops);
+
+	return ret < 0 ? -ENODEV : 0;
 }
 console_initcall(hvc_dcc_console_init);
 
 static int __init hvc_dcc_init(void)
 {
+	struct hvc_struct *p;
+
+	/* This can run on any core */
 	if (!hvc_dcc_check())
 		return -ENODEV;
 
-	hvc_alloc(0, 0, &hvc_dcc_get_put_ops, 128);
-	return 0;
+	p = hvc_alloc(0, 0, &hvc_dcc_get_put_ops, 128);
+
+	return IS_ERR(p) ? PTR_ERR(p) : 0;
 }
 device_initcall(hvc_dcc_init);
-- 
Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project.

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