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wl12xx: alloc buffer in driver_state_read to prevent compilation warning

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When compiling wl12xx for x86, there was a warning complaining about
the size of the buffer we were allocating in the stack:

drivers/net/wireless/wl12xx/debugfs.c: In function 'driver_state_read':
drivers/net/wireless/wl12xx/debugfs.c:380:1: warning: the frame size of 1040 bytes is larger than 1024 bytes

To prevent this, allocate the buffer in the heap instead.

Signed-off-by: Luciano Coelho <coelho@ti.com>
This commit is contained in:
Luciano Coelho 2011-12-15 14:58:08 +02:00
parent ef1870673d
commit c99f895a23
1 changed files with 13 additions and 3 deletions
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16
drivers/net/wireless/wl12xx/debugfs.c
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@ -317,12 +317,19 @@ static ssize_t driver_state_read(struct file *file, char __user *user_buf,
{
struct wl1271 *wl = file->private_data;
int res = 0;
char buf[1024];
ssize_t ret;
char *buf;
#define DRIVER_STATE_BUF_LEN 1024
buf = kmalloc(DRIVER_STATE_BUF_LEN, GFP_KERNEL);
if (!buf)
return -ENOMEM;
mutex_lock(&wl->mutex);
#define DRIVER_STATE_PRINT(x, fmt) \
(res += scnprintf(buf + res, sizeof(buf) - res,\
(res += scnprintf(buf + res, DRIVER_STATE_BUF_LEN - res,\
#x " = " fmt "\n", wl->x))
#define DRIVER_STATE_PRINT_LONG(x) DRIVER_STATE_PRINT(x, "%ld")
@ -373,10 +380,13 @@ static ssize_t driver_state_read(struct file *file, char __user *user_buf,
#undef DRIVER_STATE_PRINT_LHEX
#undef DRIVER_STATE_PRINT_STR
#undef DRIVER_STATE_PRINT
#undef DRIVER_STATE_BUF_LEN
mutex_unlock(&wl->mutex);
return simple_read_from_buffer(user_buf, count, ppos, buf, res);
ret = simple_read_from_buffer(user_buf, count, ppos, buf, res);
kfree(buf);
return ret;
}
static const struct file_operations driver_state_ops = {