sis5513: fail early for unsupported chipsets

* Factor out chipset family detection from init_chipset_sis5513()
  to sis_find_family().

* Use sis_find_family() in sis5513_init_one() to fail early if the
  chipset is unsupported.

* Keep a local copy sis5513_chipset in sis5513_init_one()
  and set .udma_mask according to chipset family.

* Remove no longer need ->ultra_mask setting from init_hwif_sis5513().

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

diff --git a/drivers/ide/pci/sis5513.c b/drivers/ide/pci/sis5513.c
index 65ee2ccabed60e69c9f8408ae116870647eea624..181b647e5ca9625d4d91d9875d46894a2a249e1c 100644 (file)
--- a/drivers/ide/pci/sis5513.c
+++ b/drivers/ide/pci/sis5513.c
@@ -359,9 +359,7 @@ static u8 sis5513_ata133_udma_filter(ide_drive_t *drive)
        return (regdw & 0x08) ? ATA_UDMA6 : ATA_UDMA5;
 }
 
-/* Chip detection and general config */
-static unsigned int __devinit init_chipset_sis5513(struct pci_dev *dev,
-                                                  const char *name)
+static int __devinit sis_find_family(struct pci_dev *dev)
 {
        struct pci_dev *host;
        int i = 0;
@@ -442,14 +440,16 @@ static unsigned int __devinit init_chipset_sis5513(struct pci_dev *dev,
                        }
        }
 
-       if (!chipset_family)
-               return -1;
+       return chipset_family;
+}
 
+static unsigned int __devinit init_chipset_sis5513(struct pci_dev *dev,
+                                                  const char *name)
+{
        /* Make general config ops here
           1/ tell IDE channels to operate in Compatibility mode only
           2/ tell old chips to allow per drive IDE timings */
 
-       {
        u8 reg;
        u16 regw;
 
@@ -495,7 +495,6 @@ static unsigned int __devinit init_chipset_sis5513(struct pci_dev *dev,
                        pci_write_config_byte(dev, 0x52, reg|0x08);
                break;
        }
-       }
 
        return 0;
 }
@@ -546,8 +545,6 @@ static u8 __devinit ata66_sis5513(ide_hwif_t *hwif)
 
 static void __devinit init_hwif_sis5513(ide_hwif_t *hwif)
 {
-       u8 udma_rates[] = { 0x00, 0x00, 0x07, 0x1f, 0x3f, 0x3f, 0x7f, 0x7f };
-
        hwif->set_pio_mode = &sis_set_pio_mode;
        hwif->set_dma_mode = &sis_set_dma_mode;
 
@@ -555,11 +552,6 @@ static void __devinit init_hwif_sis5513(ide_hwif_t *hwif)
                hwif->udma_filter = sis5513_ata133_udma_filter;
 
        hwif->cable_detect = ata66_sis5513;
-
-       if (hwif->dma_base == 0)
-               return;
-
-       hwif->ultra_mask = udma_rates[chipset_family];
 }
 
 static const struct ide_port_info sis5513_chipset __devinitdata = {
@@ -574,7 +566,15 @@ static const struct ide_port_info sis5513_chipset __devinitdata = {
 
 static int __devinit sis5513_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 {
-       return ide_setup_pci_device(dev, &sis5513_chipset);
+       struct ide_port_info d = sis5513_chipset;
+       u8 udma_rates[] = { 0x00, 0x00, 0x07, 0x1f, 0x3f, 0x3f, 0x7f, 0x7f };
+
+       if (sis_find_family(dev) == 0)
+               return -ENOTSUPP;
+
+       d.udma_mask = udma_rates[chipset_family];
+
+       return ide_setup_pci_device(dev, &d);
 }
 
 static const struct pci_device_id sis5513_pci_tbl[] = {