From 3160977a6e66ea4c4b4f33010f5d04f0004b938c Mon Sep 17 00:00:00 2001
From: Steve Wise <swise@opengridcomputing.com>
Date: Wed, 29 Sep 2010 18:21:33 +0000
Subject: [PATCH] RDMA/cxgb4: Use simple_read_from_buffer() for debugfs
handlers
We can replace our equivalent open-coded version.
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
---
drivers/infiniband/hw/cxgb4/device.c | 26 +-------------------------
1 file changed, 1 insertion(+), 25 deletions(-)
diff --git a/drivers/infiniband/hw/cxgb4/device.c b/drivers/infiniband/hw/cxgb4/device.c
index b25435736d44..22a290d0d5bf 100644
--- a/drivers/infiniband/hw/cxgb4/device.c
+++ b/drivers/infiniband/hw/cxgb4/device.c
@@ -68,32 +68,8 @@ static ssize_t debugfs_read(struct file *file, char __user *buf, size_t count,
loff_t *ppos)
{
struct c4iw_debugfs_data *d = file->private_data;
- loff_t pos = *ppos;
- loff_t avail = d->pos;
- if (pos < 0)
- return -EINVAL;
- if (pos >= avail)
- return 0;
- if (count > avail - pos)
- count = avail - pos;
-
- while (count) {
- size_t len = 0;
-
- len = min((int)count, (int)d->pos - (int)pos);
- if (copy_to_user(buf, d->buf + pos, len))
- return -EFAULT;
- if (len == 0)
- return -EINVAL;
-
- buf += len;
- pos += len;
- count -= len;
- }
- count = pos - *ppos;
- *ppos = pos;
- return count;
+ return simple_read_from_buffer(buf, count, ppos, d->buf, d->pos);
}
static int dump_qp(int id, void *p, void *data)
--
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