path: root/drivers/ata/pata_pdc202xx_old.c
diff options
authorTejun Heo <>2007-05-04 12:43:58 +0200
committerJeff Garzik <>2007-05-11 18:09:18 -0400
commit1626aeb881236c8cb022b5e4ca594146a951d669 (patch)
tree30f3457e4b5d76e62ee192fcc0d52b0ee8a829df /drivers/ata/pata_pdc202xx_old.c
parent920a4b1038e442700a1cfac77ea7e20bd615a2c3 (diff)
libata: clean up SFF init mess
The intention of using port_mask in SFF init helpers was to eventually support exoctic configurations such as combination of legacy and native port on the same controller. This never became actually necessary and the related code always has been subtly broken one way or the other. Now that new init model is in place, there is no reason to make common helpers capable of handling all corner cases. Exotic cases can simply dealt within LLDs as necessary. This patch removes port_mask handling in SFF init helpers. SFF init helpers don't take n_ports argument and interpret it into port_mask anymore. All information is carried via port_info. n_ports argument is dropped and always two ports are allocated. LLD can tell SFF to skip certain port by marking it dummy. Note that SFF code has been treating unuvailable ports this way for a long time until recent breakage fix from Linus and is consistent with how other drivers handle with unavailable ports. This fixes 1-port legacy host handling still broken after the recent native mode fix and simplifies SFF init logic. The following changes are made... * ata_pci_init_native_host() and ata_init_legacy_host() both now try to initialized whatever they can and mark failed ports dummy. They return 0 if any port is successfully initialized. * ata_pci_prepare_native_host() and ata_pci_init_one() now doesn't take n_ports argument. All info should be specified via port_info array. Always two ports are allocated. * ata_pci_init_bmdma() exported to be used by LLDs in exotic cases. * port_info handling in all LLDs are standardized - all port_info arrays are const stack variable named ppi. Unless the second port is different from the first, its port_info is specified as NULL (tells libata that it's identical to the last non-NULL port_info). * pata_hpt37x/hpt3x2n: don't modify static variable directly. Make an on-stack copy instead as ata_piix does. * pata_uli: It has 4 ports instead of 2. Don't use ata_pci_prepare_native_host(). Allocate the host explicitly and use init helpers. It's simple enough. Signed-off-by: Tejun Heo <> Signed-off-by: Jeff Garzik <>
Diffstat (limited to 'drivers/ata/pata_pdc202xx_old.c')
1 files changed, 3 insertions, 5 deletions
diff --git a/drivers/ata/pata_pdc202xx_old.c b/drivers/ata/pata_pdc202xx_old.c
index 3e204c329d51..edbaf9d653b8 100644
--- a/drivers/ata/pata_pdc202xx_old.c
+++ b/drivers/ata/pata_pdc202xx_old.c
@@ -317,7 +317,7 @@ static struct ata_port_operations pdc2026x_port_ops = {
static int pdc202xx_init_one(struct pci_dev *dev, const struct pci_device_id *id)
- static struct ata_port_info info[3] = {
+ static const struct ata_port_info info[3] = {
.sht = &pdc202xx_sht,
@@ -344,9 +344,7 @@ static int pdc202xx_init_one(struct pci_dev *dev, const struct pci_device_id *id
- static struct ata_port_info *port_info[2];
- port_info[0] = port_info[1] = &info[id->driver_data];
+ const struct ata_port_info *ppi[] = { &info[id->driver_data], NULL };
if (dev->device == PCI_DEVICE_ID_PROMISE_20265) {
struct pci_dev *bridge = dev->bus->self;
@@ -358,7 +356,7 @@ static int pdc202xx_init_one(struct pci_dev *dev, const struct pci_device_id *id
return -ENODEV;
- return ata_pci_init_one(dev, port_info, 2);
+ return ata_pci_init_one(dev, ppi);
static const struct pci_device_id pdc202xx[] = {