ide: check drive->present in ide_get_paired_drive()

* Change ide_get_paired_drive() to return NULL if peer device
  is not present and update all users accordingly.

While at it:

* ide_get_paired_drive() -> ide_get_pair_dev()

* Use ide_get_pair_dev() in cs5530.c, sc1200.c and via82cxxx.c.

There should be no functional changes caused by this patch.

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/ide/pci/cs5535.c b/drivers/ide/pci/cs5535.c
index dd3dc23af995..707d2e182552 100644
--- a/drivers/ide/pci/cs5535.c
+++ b/drivers/ide/pci/cs5535.c
@@ -80,12 +80,12 @@ static void cs5535_set_speed(ide_drive_t *drive, const u8 speed)
 
         /* Set the PIO timings */
         if (speed < XFER_SW_DMA_0) {
-                ide_drive_t *pair = ide_get_paired_drive(drive);
+                ide_drive_t *pair = ide_get_pair_dev(drive);
                 u8 cmd, pioa;
 
                 cmd = pioa = speed - XFER_PIO_0;
 
-                if (pair->present) {
+                if (pair) {
                         u8 piob = ide_get_best_pio_mode(pair, 255, 4);
 
                         if (piob < cmd)