ide-cd: factor out transfer size checking from cdrom_read_intr()

This is a preparation for cdrom_read_intr() and cdrom_write_intr() merge.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index f0191f0..2e0c933 100644 (file)
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -714,6 +714,31 @@ int cdrom_read_check_ireason (ide_drive_t *drive, int len, int ireason)
 }
 
 /*
+ * Assume that the drive will always provide data in multiples of at least
+ * SECTOR_SIZE, as it gets hairy to keep track of the transfers otherwise.
+ */
+static int ide_cd_check_transfer_size(ide_drive_t *drive, int len)
+{
+       struct cdrom_info *cd = drive->driver_data;
+
+       if ((len % SECTOR_SIZE) == 0)
+               return 0;
+
+       printk(KERN_ERR "%s: %s: Bad transfer size %d\n",
+                       drive->name, __FUNCTION__, len);
+
+       if (cd->cd_flags & IDE_CD_FLAG_LIMIT_NFRAMES)
+               printk(KERN_ERR "  This drive is not supported by "
+                               "this version of the driver\n");
+       else {
+               printk(KERN_ERR "  Trying to limit transfer sizes\n");
+               cd->cd_flags |= IDE_CD_FLAG_LIMIT_NFRAMES;
+       }
+
+       return 1;
+}
+
+/*
  * Interrupt routine.  Called when a read request has completed.
  */
 static ide_startstop_t cdrom_read_intr (ide_drive_t *drive)
@@ -774,18 +799,7 @@ static ide_startstop_t cdrom_read_intr (ide_drive_t *drive)
        if (cdrom_read_check_ireason (drive, len, ireason))
                return ide_stopped;
 
-       /* Assume that the drive will always provide data in multiples
-          of at least SECTOR_SIZE, as it gets hairy to keep track
-          of the transfers otherwise. */
-       if ((len % SECTOR_SIZE) != 0) {
-               printk (KERN_ERR "%s: cdrom_read_intr: Bad transfer size %d\n",
-                       drive->name, len);
-               if (info->cd_flags & IDE_CD_FLAG_LIMIT_NFRAMES)
-                       printk (KERN_ERR "  This drive is not supported by this version of the driver\n");
-               else {
-                       printk (KERN_ERR "  Trying to limit transfer sizes\n");
-                       info->cd_flags |= IDE_CD_FLAG_LIMIT_NFRAMES;
-               }
+       if (ide_cd_check_transfer_size(drive, len)) {
                cdrom_end_request(drive, 0);
                return ide_stopped;
        }