Various libata documentation updates.

This is a merger of libata docs + cleanups from
Martin Waitz <tali@admingilde.org> and me.

From: Randy Dunlap <rdunlap@xenotime.net>
From: Martin Waitz <tali@admingilde.org>

Fix libata kernel-doc comments to match code.
Add some function parameters to kernel-doc.
Fix some typos/spellos.
Put comments in <= 80 columns.
Make one DPRINTK string unique.
Fix sparse cast warnings.

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

1 files changed, 5 insertions, 4 deletions

diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c
index ab6b53349d6f..6df82934d2d6 100644
--- a/drivers/scsi/libata-scsi.c
+++ b/drivers/scsi/libata-scsi.c
@@ -151,7 +151,7 @@ int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
         struct scsi_sense_hdr sshdr;
         enum dma_data_direction data_dir;
 
-        if (NULL == (void *)arg)
+        if (arg == NULL)
                 return -EINVAL;
 
         if (copy_from_user(args, arg, sizeof(args)))
@@ -201,7 +201,7 @@ int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
         /* Need code to retrieve data from check condition? */
 
         if ((argbuf)
-         && copy_to_user((void *)(arg + sizeof(args)), argbuf, argsize))
+         && copy_to_user(arg + sizeof(args), argbuf, argsize))
                 rc = -EFAULT;
 error:
         if (argbuf)
@@ -228,7 +228,7 @@ int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
         u8 args[7];
         struct scsi_sense_hdr sshdr;
 
-        if (NULL == (void *)arg)
+        if (arg == NULL)
                 return -EINVAL;
 
         if (copy_from_user(args, arg, sizeof(args)))
@@ -2533,7 +2533,8 @@ out_unlock:
 
 /**
  *      ata_scsi_simulate - simulate SCSI command on ATA device
- *      @id: current IDENTIFY data for target device.
+ *      @ap: port the device is connected to
+ *      @dev: the target device
  *      @cmd: SCSI command being sent to device.
  *      @done: SCSI command completion function.
  *