diff options
Diffstat (limited to 'drivers/s390/cio')
| -rw-r--r-- | drivers/s390/cio/cmf.c | 20 |
1 files changed, 3 insertions, 17 deletions
diff --git a/drivers/s390/cio/cmf.c b/drivers/s390/cio/cmf.c index 7ed6c865501b..531861d005fd 100644 --- a/drivers/s390/cio/cmf.c +++ b/drivers/s390/cio/cmf.c @@ -280,12 +280,9 @@ void retry_set_schib(struct ccw_device *cdev) static int cmf_copy_block(struct ccw_device *cdev) { - struct subchannel *sch; - void *reference_buf; - void *hw_block; + struct subchannel *sch = to_subchannel(cdev->dev.parent); struct cmb_data *cmb_data; - - sch = to_subchannel(cdev->dev.parent); + void *hw_block; if (cio_update_schib(sch)) return -ENODEV; @@ -300,19 +297,8 @@ static int cmf_copy_block(struct ccw_device *cdev) } cmb_data = cdev->private->cmb; hw_block = cmb_data->hw_block; - if (!memcmp(cmb_data->last_block, hw_block, cmb_data->size)) - /* No need to copy. */ - return 0; - reference_buf = kzalloc(cmb_data->size, GFP_ATOMIC); - if (!reference_buf) - return -ENOMEM; - /* Ensure consistency of block copied from hardware. */ - do { - memcpy(cmb_data->last_block, hw_block, cmb_data->size); - memcpy(reference_buf, hw_block, cmb_data->size); - } while (memcmp(cmb_data->last_block, reference_buf, cmb_data->size)); + memcpy(cmb_data->last_block, hw_block, cmb_data->size); cmb_data->last_update = get_tod_clock(); - kfree(reference_buf); return 0; } |