tapechar_read()/tapechar_write() modify file->f_pos directly instead of
the ppos given to them. The VFS later updates the file->f_pos and
overwrites it with the unchanged value of ppos.
Signed-off-by: Jan Blunck <jblunck@xxxxxxx>
---
drivers/s390/char/tape_char.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/s390/char/tape_char.c b/drivers/s390/char/tape_char.c
index 31566c5..3514f6e 100644
--- a/drivers/s390/char/tape_char.c
+++ b/drivers/s390/char/tape_char.c
@@ -170,7 +170,7 @@ tapechar_read(struct file *filp, char __user *data, size_t count, loff_t *ppos)
if (rc == 0) {
rc = block_size - request->rescnt;
DBF_EVENT(6, "TCHAR:rbytes: %x\n", rc);
- filp->f_pos += rc;
+ *ppos += rc;
/* Copy data from idal buffer to user space. */
if (idal_buffer_to_user(device->char_data.idal_buf,
data, rc) != 0)
@@ -238,7 +238,7 @@ tapechar_write(struct file *filp, const char __user *data, size_t count, loff_t
break;
DBF_EVENT(6, "TCHAR:wbytes: %lx\n",
block_size - request->rescnt);
- filp->f_pos += block_size - request->rescnt;
+ *ppos += block_size - request->rescnt;
written += block_size - request->rescnt;
if (request->rescnt != 0)
break;
--
1.6.4.2
--
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