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scsi: fcoe: catch invalid values for the 'enabled' attribute

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The 'enabled' sysfs attribute only accepts the values '0' and '1',
so we should error out any other values.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Acked-by: Johannes Thumshirn <jth@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Hannes Reinecke 2016-10-13 15:10:57 +02:00 committed by Martin K. Petersen
parent c216e8762f
commit 5cc5512690
1 changed files with 10 additions and 2 deletions
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12
drivers/scsi/fcoe/fcoe_sysfs.c
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@ -335,16 +335,24 @@ static ssize_t store_ctlr_enabled(struct device *dev,
const char *buf, size_t count)
{
struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
bool enabled;
int rc;
if (*buf == '1')
enabled = true;
else if (*buf == '0')
enabled = false;
else
return -EINVAL;
switch (ctlr->enabled) {
case FCOE_CTLR_ENABLED:
if (*buf == '1')
if (enabled)
return count;
ctlr->enabled = FCOE_CTLR_DISABLED;
break;
case FCOE_CTLR_DISABLED:
if (*buf == '0')
if (!enabled)
return count;
ctlr->enabled = FCOE_CTLR_ENABLED;
break;