libata: update libata LLDs to use devres

Update libata LLDs to use devres.  Core layer is already converted to
support managed LLDs.  This patch simplifies initialization and fixes
many resource related bugs in init failure and detach path.  For
example, all converted drivers now handle ata_device_add() failure
gracefully without excessive resource rollback code.

As most resources are released automatically on driver detach, many
drivers don't need or can do with much simpler ->{port|host}_stop().
In general, stop callbacks are need iff port or host needs to be given
commands to shut it down.  Note that freezing is enough in many cases
and ports are automatically frozen before being detached.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 1 insertions, 21 deletions

diff --git a/drivers/ata/pata_mpiix.c b/drivers/ata/pata_mpiix.c
index 4ccca938675e..c4a1b10f3bca 100644
--- a/drivers/ata/pata_mpiix.c
+++ b/drivers/ata/pata_mpiix.c
@@ -194,8 +194,6 @@ static struct ata_port_operations mpiix_port_ops = {
 	.irq_clear	= ata_bmdma_irq_clear,
 
 	.port_start	= ata_port_start,
-	.port_stop	= ata_port_stop,
-	.host_stop	= ata_host_stop
 };
 
 static int mpiix_init_one(struct pci_dev *dev, const struct pci_device_id *id)
@@ -258,24 +256,6 @@ static int mpiix_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 	return -ENODEV;
 }
 
-/**
- *	mpiix_remove_one	-	device unload
- *	@pdev: PCI device being removed
- *
- *	Handle an unplug/unload event for a PCI device. Unload the
- *	PCI driver but do not use the default handler as we *MUST NOT*
- *	disable the device as it has other functions.
- */
-
-static void __devexit mpiix_remove_one(struct pci_dev *pdev)
-{
-	struct device *dev = pci_dev_to_dev(pdev);
-	struct ata_host *host = dev_get_drvdata(dev);
-
-	ata_host_remove(host);
-	dev_set_drvdata(dev, NULL);
-}
-
 static const struct pci_device_id mpiix[] = {
 	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82371MX), },
 
@@ -286,7 +266,7 @@ static struct pci_driver mpiix_pci_driver = {
 	.name 		= DRV_NAME,
 	.id_table	= mpiix,
 	.probe 		= mpiix_init_one,
-	.remove		= mpiix_remove_one,
+	.remove		= ata_pci_remove_one,
 	.suspend	= ata_pci_device_suspend,
 	.resume		= ata_pci_device_resume,
 };