[SCSI] ipr: use memory_read_from_buffer()
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index d30eb7b..de62f4d 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -2456,20 +2456,14 @@
struct Scsi_Host *shost = class_to_shost(dev);
struct ipr_ioa_cfg *ioa_cfg = (struct ipr_ioa_cfg *)shost->hostdata;
unsigned long lock_flags = 0;
- int size = IPR_TRACE_SIZE;
- char *src = (char *)ioa_cfg->trace;
-
- if (off > size)
- return 0;
- if (off + count > size) {
- size -= off;
- count = size;
- }
+ ssize_t ret;
spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
- memcpy(buf, &src[off], count);
+ ret = memory_read_from_buffer(buf, count, &off, ioa_cfg->trace,
+ IPR_TRACE_SIZE);
spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
- return count;
+
+ return ret;
}
static struct bin_attribute ipr_trace_attr = {