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authorMathias Krause <minipli@googlemail.com>2014-02-21 21:38:35 +0100
committerDavid S. Miller <davem@davemloft.net>2014-02-24 18:54:26 -0500
commit0945574750f3040a2309d960a569215598a64672 (patch)
treedaccd26d3c144a5a1fa81b157a365b4a407aa45e /net/core/pktgen.c
parent20b0c718c3bb122107bebadbb8ecf4bab76fb392 (diff)
downloadblackbird-op-linux-0945574750f3040a2309d960a569215598a64672.tar.gz
blackbird-op-linux-0945574750f3040a2309d960a569215598a64672.zip
pktgen: simplify error handling in pgctrl_write()
The 'out' label is just a relict from previous times as pgctrl_write() had multiple error paths. Get rid of it and simply return right away on errors. Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Mathias Krause <minipli@googlemail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/pktgen.c')
-rw-r--r--net/core/pktgen.c19
1 files changed, 6 insertions, 13 deletions
diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index cc07c434948a..53c30971172a 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -476,14 +476,11 @@ static int pgctrl_show(struct seq_file *seq, void *v)
static ssize_t pgctrl_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
- int err = 0;
char data[128];
struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id);
- if (!capable(CAP_NET_ADMIN)) {
- err = -EPERM;
- goto out;
- }
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
if (count == 0)
return -EINVAL;
@@ -491,10 +488,9 @@ static ssize_t pgctrl_write(struct file *file, const char __user *buf,
if (count > sizeof(data))
count = sizeof(data);
- if (copy_from_user(data, buf, count)) {
- err = -EFAULT;
- goto out;
- }
+ if (copy_from_user(data, buf, count))
+ return -EFAULT;
+
data[count - 1] = 0; /* Strip trailing '\n' and terminate string */
if (!strcmp(data, "stop"))
@@ -509,10 +505,7 @@ static ssize_t pgctrl_write(struct file *file, const char __user *buf,
else
pr_warning("Unknown command: %s\n", data);
- err = count;
-
-out:
- return err;
+ return count;
}
static int pgctrl_open(struct inode *inode, struct file *file)
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