From: David Kershner <david.kershner@unisys.com>
Date: Tue, 28 Mar 2017 13:34:26 +0000 (-0400)
Subject: staging: unisys: visorbus: add error handling textid_show
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=0d40643672ddb5833b8404397010c3d44515cad0;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

staging: unisys: visorbus: add error handling textid_show

Don't just drop the error from visorchannel_read on the floor, report it.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/staging/unisys/visorbus/visorchipset.c b/drivers/staging/unisys/visorbus/visorchipset.c
index b09ef4ce5ae2..cd2f4194ab93 100644
--- a/drivers/staging/unisys/visorbus/visorchipset.c
+++ b/drivers/staging/unisys/visorbus/visorchipset.c
@@ -205,12 +205,16 @@ static ssize_t textid_show(struct device *dev, struct device_attribute *attr,
 			   char *buf)
 {
 	u32 text_id = 0;
+	int err;
+
+	err = visorchannel_read
+			(chipset_dev->controlvm_channel,
+			 offsetof(struct spar_controlvm_channel_protocol,
+				  installation_text_id),
+			 &text_id, sizeof(u32));
+	if (err)
+		return err;
 
-	visorchannel_read
-		(chipset_dev->controlvm_channel,
-		 offsetof(struct spar_controlvm_channel_protocol,
-			  installation_text_id),
-		 &text_id, sizeof(u32));
 	return sprintf(buf, "%i\n", text_id);
 }