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staging: unisys: visorbus: add error handling to toolaction_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>
This commit is contained in:
David Kershner 2017-03-28 09:34:23 -04:00 committed by Greg Kroah-Hartman
parent deeeca6db2
commit 002a5abb23
1 changed files with 8 additions and 3 deletions
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11
drivers/staging/unisys/visorbus/visorchipset.c
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@ -91,10 +91,15 @@ static ssize_t toolaction_show(struct device *dev,
char *buf) char *buf)
{ {
u8 tool_action = 0; u8 tool_action = 0;
int err;
err = visorchannel_read(chipset_dev->controlvm_channel,
offsetof(struct spar_controlvm_channel_protocol,
tool_action),
&tool_action, sizeof(u8));
if (err)
return err;
visorchannel_read(chipset_dev->controlvm_channel,
offsetof(struct spar_controlvm_channel_protocol,
tool_action), &tool_action, sizeof(u8));
return sprintf(buf, "%u\n", tool_action); return sprintf(buf, "%u\n", tool_action);
} }