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staging: unisys: visorbus: don't ignore visorchannel_read error 

Don't override the visorchannel_read_error, just return the
error that it generates.

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 09:34:51 -04:00 committed by Greg Kroah-Hartman
parent e0d210ae5f
commit 711c67f4ec
1 changed files with 7 additions and 4 deletions
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11
drivers/staging/unisys/visorbus/visorbus_main.c
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@ -691,6 +691,8 @@ static int
get_vbus_header_info(struct visorchannel *chan,
struct spar_vbus_headerinfo *hdr_info)
{
int err;
if (!spar_check_channel(visorchannel_get_header(chan),
spar_vbus_channel_protocol_uuid,
"vbus",
@ -699,10 +701,11 @@ get_vbus_header_info(struct visorchannel *chan,
SPAR_VBUS_CHANNEL_PROTOCOL_SIGNATURE))
return -EINVAL;
if (visorchannel_read(chan, sizeof(struct channel_header), hdr_info,
sizeof(*hdr_info)) < 0) {
return -EIO;
}
err = visorchannel_read(chan, sizeof(struct channel_header), hdr_info,
sizeof(*hdr_info));
if (err < 0)
return err;
if (hdr_info->struct_bytes < sizeof(struct spar_vbus_headerinfo))
return -EINVAL;