From 5cc5512690537fcfafd50a5941cdbdb9f4134308 Mon Sep 17 00:00:00 2001 From: Hannes Reinecke Date: Thu, 13 Oct 2016 15:10:57 +0200 Subject: [PATCH] scsi: fcoe: catch invalid values for the 'enabled' attribute The 'enabled' sysfs attribute only accepts the values '0' and '1', so we should error out any other values. Signed-off-by: Hannes Reinecke Acked-by: Johannes Thumshirn Signed-off-by: Martin K. Petersen --- drivers/scsi/fcoe/fcoe_sysfs.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/fcoe/fcoe_sysfs.c b/drivers/scsi/fcoe/fcoe_sysfs.c index 9e6baac18e76..9cf3d56296ab 100644 --- a/drivers/scsi/fcoe/fcoe_sysfs.c +++ b/drivers/scsi/fcoe/fcoe_sysfs.c @@ -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; -- 2.30.2