diff options
| author | Jon Mason <jon.mason@intel.com> | 2013-01-19 02:02:25 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-01-20 15:45:51 -0800 |
| commit | d7237e22bbcffc3237a234fdf165fde4c2b0a22d (patch) | |
| tree | 6e8eedf9be954585dd4da0dea6b1e6c958d121d6 /drivers | |
| parent | f766755c3057c36dc0796d2b0c633611dde6eccf (diff) | |
NTB: correct stack usage warning in debugfs_read
Correct gcc warning of using too much stack debugfs_read. This is done
by kmallocing the buffer instead of using the char array on stack.
Also, shrinking the buffer to something closer to what is currently
being used.
Signed-off-by: Jon Mason <jon.mason@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/ntb/ntb_transport.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c index e11b57e1939c..1bed1ba2fe5e 100644 --- a/drivers/ntb/ntb_transport.c +++ b/drivers/ntb/ntb_transport.c @@ -368,10 +368,14 @@ static ssize_t debugfs_read(struct file *filp, char __user *ubuf, size_t count, loff_t *offp) { struct ntb_transport_qp *qp; - char buf[1024]; + char *buf; ssize_t ret, out_offset, out_count; - out_count = 1024; + out_count = 600; + + buf = kmalloc(out_count, GFP_KERNEL); + if (!buf) + return -ENOMEM; qp = filp->private_data; out_offset = 0; @@ -410,10 +414,13 @@ static ssize_t debugfs_read(struct file *filp, char __user *ubuf, size_t count, "tx_mw_end - \t%p\n", qp->tx_mw_end); out_offset += snprintf(buf + out_offset, out_count - out_offset, - "QP Link %s\n", (qp->qp_link == NTB_LINK_UP) ? + "\nQP Link %s\n", (qp->qp_link == NTB_LINK_UP) ? "Up" : "Down"); + if (out_offset > out_count) + out_offset = out_count; ret = simple_read_from_buffer(ubuf, count, offp, buf, out_offset); + kfree(buf); return ret; } |