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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>
This commit is contained in:
David Kershner 2017-03-28 09:34:26 -04:00 committed by Greg Kroah-Hartman
parent d9857c794e
commit 0d40643672
1 changed files with 9 additions and 5 deletions
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14
drivers/staging/unisys/visorbus/visorchipset.c
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@ -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);
}