[PATCH 08/44] staging: unisys: visorbus: add error handling to error_show

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

Signed-off-by: David Kershner <david.kershner@xxxxxxxxxx>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@xxxxxxxxxx>
---
 drivers/staging/unisys/visorbus/visorchipset.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/unisys/visorbus/visorchipset.c b/drivers/staging/unisys/visorbus/visorchipset.c
index 00fd02f..b09ef4c 100644
--- a/drivers/staging/unisys/visorbus/visorchipset.c
+++ b/drivers/staging/unisys/visorbus/visorchipset.c
@@ -170,11 +170,14 @@ static ssize_t error_show(struct device *dev, struct device_attribute *attr,
 			  char *buf)
 {
 	u32 error = 0;
+	int err;
 
-	visorchannel_read(chipset_dev->controlvm_channel,
-			  offsetof(struct spar_controlvm_channel_protocol,
-				   installation_error),
-			  &error, sizeof(u32));
+	err = visorchannel_read(chipset_dev->controlvm_channel,
+				offsetof(struct spar_controlvm_channel_protocol,
+					 installation_error),
+				&error, sizeof(u32));
+	if (err)
+		return err;
 	return sprintf(buf, "%i\n", error);
 }
 
-- 
git-series 0.9.1
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