KumiSystems/openwrtv4
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

ar71xx: ag71xx: use dynamically allocated buffer for napi_stats

Browse source 
SVN-Revision: 26843
This commit is contained in:
Gabor Juhos 2011-05-07 12:40:26 +00:00
parent a6708d20d1
commit 896e1d1ab4
1 changed files with 19 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

28
target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_debugfs.c
View file

@ -99,38 +99,48 @@ static ssize_t read_file_napi_stats(struct file *file, char __user *user_buf,
{ {
struct ag71xx *ag = file->private_data; struct ag71xx *ag = file->private_data;
struct ag71xx_napi_stats *stats = &ag->debug.napi_stats; struct ag71xx_napi_stats *stats = &ag->debug.napi_stats;
char buf[2048]; char *buf;
unsigned int buflen;
unsigned int len = 0; unsigned int len = 0;
unsigned long rx_avg = 0; unsigned long rx_avg = 0;
unsigned long tx_avg = 0; unsigned long tx_avg = 0;
int ret;
int i; int i;
buflen = 2048;
buf = kmalloc(buflen, GFP_KERNEL);
if (!buf)
return -ENOMEM;
if (stats->rx_count) if (stats->rx_count)
rx_avg = stats->rx_packets / stats->rx_count; rx_avg = stats->rx_packets / stats->rx_count;
if (stats->tx_count) if (stats->tx_count)
tx_avg = stats->tx_packets / stats->tx_count; tx_avg = stats->tx_packets / stats->tx_count;
len += snprintf(buf + len, sizeof(buf) - len, "%3s %10s %10s\n", len += snprintf(buf + len, buflen - len, "%3s %10s %10s\n",
"len", "rx", "tx"); "len", "rx", "tx");
for (i = 1; i <= AG71XX_NAPI_WEIGHT; i++) for (i = 1; i <= AG71XX_NAPI_WEIGHT; i++)
len += snprintf(buf + len, sizeof(buf) - len, len += snprintf(buf + len, buflen - len,
"%3d: %10lu %10lu\n", "%3d: %10lu %10lu\n",
i, stats->rx[i], stats->tx[i]); i, stats->rx[i], stats->tx[i]);
len += snprintf(buf + len, sizeof(buf) - len, "\n"); len += snprintf(buf + len, buflen - len, "\n");
len += snprintf(buf + len, sizeof(buf) - len, "%3s: %10lu %10lu\n", len += snprintf(buf + len, buflen - len, "%3s: %10lu %10lu\n",
"sum", stats->rx_count, stats->tx_count); "sum", stats->rx_count, stats->tx_count);
len += snprintf(buf + len, sizeof(buf) - len, "%3s: %10lu %10lu\n", len += snprintf(buf + len, buflen - len, "%3s: %10lu %10lu\n",
"avg", rx_avg, tx_avg); "avg", rx_avg, tx_avg);
len += snprintf(buf + len, sizeof(buf) - len, "%3s: %10lu %10lu\n", len += snprintf(buf + len, buflen - len, "%3s: %10lu %10lu\n",
"max", stats->rx_packets_max, stats->tx_packets_max); "max", stats->rx_packets_max, stats->tx_packets_max);
len += snprintf(buf + len, sizeof(buf) - len, "%3s: %10lu %10lu\n", len += snprintf(buf + len, buflen - len, "%3s: %10lu %10lu\n",
"pkt", stats->rx_packets, stats->tx_packets); "pkt", stats->rx_packets, stats->tx_packets);
return simple_read_from_buffer(user_buf, count, ppos, buf, len); ret = simple_read_from_buffer(user_buf, count, ppos, buf, len);
kfree(buf);
return ret;
} }
static const struct file_operations ag71xx_fops_napi_stats = { static const struct file_operations ag71xx_fops_napi_stats = {