Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (21 commits)
  [SCSI] sd: fix computation of the full size of the device
  [SCSI] lib: string_get_size(): don't hang on zero; no decimals on exact
  [SCSI] sun3x_esp: Convert && to ||
  [SCSI] sd: remove command-size switching code
  [SCSI] 3w-9xxx: remove unnecessary local_irq_save/restore for scsi sg copy API
  [SCSI] 3w-xxxx: remove unnecessary local_irq_save/restore for scsi sg copy API
  [SCSI] fix netlink kernel-doc
  [SCSI] sd: Fix handling of NO_SENSE check condition
  [SCSI] export busy state via q->lld_busy_fn()
  [SCSI] refactor sdev/starget/shost busy checking
  [SCSI] mptfusion: Increase scsi-timeouts, similariy to the LSI 4.x driver.
  [SCSI] aic7xxx: Take the LED out of diagnostic mode on PM resume
  [SCSI] aic79xx: user visible misuse wrong SI units (not disk size!)
  [SCSI] ipr: use memory_read_from_buffer()
  [SCSI] aic79xx: fix shadowed variables
  [SCSI] aic79xx: fix shadowed variables, add statics
  [SCSI] aic7xxx: update *_shipped files
  [SCSI] aic7xxx: update .reg files
  [SCSI] aic7xxx: introduce "dont_generate_debug_code" keyword in aicasm parser
  [SCSI] scsi_dh: Initialize path state to be passive when path is not owned
  ...

1 files changed, 5 insertions, 11 deletions

diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index 098739deb02e..ded854a6dd35 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -2456,20 +2456,14 @@ static ssize_t ipr_read_trace(struct kobject *kobj,
         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 = {