alim15x3: fix handling of address setup timings

Account for the requirements of the other device on the port.

Based on libata pata_ali host driver.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/ide/alim15x3.c b/drivers/ide/alim15x3.c
index 6f0debae4e27..8e29801bbeb0 100644
--- a/drivers/ide/alim15x3.c
+++ b/drivers/ide/alim15x3.c
@@ -72,6 +72,7 @@ static void ali_fifo_control(ide_hwif_t *hwif, ide_drive_t *drive, int on)
 static void ali_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 {
         struct pci_dev *dev = to_pci_dev(hwif->dev);
+        ide_drive_t *pair = ide_get_pair_dev(drive);
         int bus_speed = ide_pci_clk ? ide_pci_clk : 33;
         unsigned long T =  1000000 / bus_speed; /* PCI clock based */
         int port = hwif->channel ? 0x5c : 0x58;
@@ -79,6 +80,16 @@ static void ali_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
         struct ide_timing t;
 
         ide_timing_compute(drive, drive->pio_mode, &t, T, 1);
+        if (pair) {
+                struct ide_timing p;
+
+                ide_timing_compute(pair, pair->pio_mode, &p, T, 1);
+                ide_timing_merge(&p, &t, &t, IDE_TIMING_SETUP);
+                if (pair->dma_mode) {
+                        ide_timing_compute(pair, pair->dma_mode, &p, T, 1);
+                        ide_timing_merge(&p, &t, &t, IDE_TIMING_SETUP);
+                }
+        }
 
         t.setup = clamp_val(t.setup, 1, 8) & 7;
         t.active = clamp_val(t.active, 1, 8) & 7;