ide: ide-cd_ioctl.c fix sparse integer as NULL pointer warnings

The function ide_cd_queue_pc should be checked as the bufflen arg is
dereferenced and lots of callers are passing in NULL.

drivers/ide/ide-cd_ioctl.c:124:46: warning: Using plain integer as NULL pointer
drivers/ide/ide-cd_ioctl.c:149:47: warning: Using plain integer as NULL pointer
drivers/ide/ide-cd_ioctl.c:231:46: warning: Using plain integer as NULL pointer
drivers/ide/ide-cd_ioctl.c:374:46: warning: Using plain integer as NULL pointer

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

diff --git a/drivers/ide/ide-cd_ioctl.c b/drivers/ide/ide-cd_ioctl.c
index 085442a..74231b4 100644 (file)
--- a/drivers/ide/ide-cd_ioctl.c
+++ b/drivers/ide/ide-cd_ioctl.c
@@ -121,7 +121,7 @@ int cdrom_eject(ide_drive_t *drive, int ejectflag,
        cmd[0] = GPCMD_START_STOP_UNIT;
        cmd[4] = loej | (ejectflag != 0);
 
-       return ide_cd_queue_pc(drive, cmd, 0, NULL, 0, sense, 0, 0);
+       return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, 0);
 }
 
 /* Lock the door if LOCKFLAG is nonzero; unlock it otherwise. */
@@ -146,7 +146,7 @@ int ide_cd_lockdoor(ide_drive_t *drive, int lockflag,
                cmd[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
                cmd[4] = lockflag ? 1 : 0;
 
-               stat = ide_cd_queue_pc(drive, cmd, 0, NULL, 0,
+               stat = ide_cd_queue_pc(drive, cmd, 0, NULL, NULL,
                                       sense, 0, 0);
        }
 
@@ -228,7 +228,7 @@ int ide_cdrom_select_speed(struct cdrom_device_info *cdi, int speed)
                cmd[5] = speed & 0xff;
        }
 
-       stat = ide_cd_queue_pc(drive, cmd, 0, NULL, 0, &sense, 0, 0);
+       stat = ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, &sense, 0, 0);
 
        if (!ide_cdrom_get_capabilities(drive, buf)) {
                ide_cdrom_update_speed(drive, buf);
@@ -371,7 +371,7 @@ static int ide_cd_fake_play_trkind(ide_drive_t *drive, void *arg)
        lba_to_msf(lba_start,   &cmd[3], &cmd[4], &cmd[5]);
        lba_to_msf(lba_end - 1, &cmd[6], &cmd[7], &cmd[8]);
 
-       return ide_cd_queue_pc(drive, cmd, 0, NULL, 0, &sense, 0, 0);
+       return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, &sense, 0, 0);
 }
 
 static int ide_cd_read_tochdr(ide_drive_t *drive, void *arg)