[PATCH 09/44] staging: unisys: visorbus: add error handling textid_show

[David Kershner <david.kershner@unisys.com>]

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>
---
 drivers/staging/unisys/visorbus/visorchipset.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/unisys/visorbus/visorchipset.c b/drivers/staging/unisys/visorbus/visorchipset.c
index b09ef4c..cd2f419 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);
 }
 
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