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Subject[patch -v2 07/23] s390: use simple_read_from_buffer
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: linux390@de.ibm.com
Cc: linux-s390@vger.kernel.org
---
arch/s390/hypfs/inode.c | 29 ++++++++++-------------------
1 file changed, 10 insertions(+), 19 deletions(-)
Index: 2.6-git/arch/s390/hypfs/inode.c
===================================================================
--- 2.6-git.orig/arch/s390/hypfs/inode.c
+++ 2.6-git/arch/s390/hypfs/inode.c
@@ -150,33 +150,24 @@ static ssize_t hypfs_aio_read(struct kio
unsigned long nr_segs, loff_t offset)
{
char *data;
- size_t len;
+ ssize_t ret;
struct file *filp = iocb->ki_filp;
/* XXX: temporary */
char __user *buf = iov[0].iov_base;
size_t count = iov[0].iov_len;

- if (nr_segs != 1) {
- count = -EINVAL;
- goto out;
- }
+ if (nr_segs != 1)
+ return -EINVAL;

data = filp->private_data;
- len = strlen(data);
- if (offset > len) {
- count = 0;
- goto out;
- }
- if (count > len - offset)
- count = len - offset;
- if (copy_to_user(buf, data + offset, count)) {
- count = -EFAULT;
- goto out;
- }
- iocb->ki_pos += count;
+ ret = simple_read_from_buffer(buf, count, &offset, data, strlen(data));
+ if (ret <= 0)
+ return ret;
+
+ iocb->ki_pos += ret;
file_accessed(filp);
-out:
- return count;
+
+ return ret;
}
static ssize_t hypfs_aio_write(struct kiocb *iocb, const struct iovec *iov,
unsigned long nr_segs, loff_t offset)
--


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