[PATCH] sata_nv: kill not-working hotplug code

sata_nv contained hotplug code which is mainly for demonstrating how
hotplug event is handled.  This patch kills the demo code in
prepration for real hotplug implementation.

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

1 files changed, 0 insertions, 169 deletions

diff --git a/drivers/scsi/sata_nv.c b/drivers/scsi/sata_nv.c
index 90551246aa46..70f81941f76e 100644
--- a/drivers/scsi/sata_nv.c
+++ b/drivers/scsi/sata_nv.c
@@ -64,12 +64,6 @@ enum {
         NV_INT_STATUS_SDEV_PM           = 0x20,
         NV_INT_STATUS_SDEV_ADDED        = 0x40,
         NV_INT_STATUS_SDEV_REMOVED      = 0x80,
-        NV_INT_STATUS_PDEV_HOTPLUG      = (NV_INT_STATUS_PDEV_ADDED |
-                                           NV_INT_STATUS_PDEV_REMOVED),
-        NV_INT_STATUS_SDEV_HOTPLUG      = (NV_INT_STATUS_SDEV_ADDED |
-                                           NV_INT_STATUS_SDEV_REMOVED),
-        NV_INT_STATUS_HOTPLUG           = (NV_INT_STATUS_PDEV_HOTPLUG |
-                                           NV_INT_STATUS_SDEV_HOTPLUG),
 
         NV_INT_ENABLE                   = 0x11,
         NV_INT_ENABLE_CK804             = 0x441,
@@ -81,12 +75,6 @@ enum {
         NV_INT_ENABLE_SDEV_PM           = 0x20,
         NV_INT_ENABLE_SDEV_ADDED        = 0x40,
         NV_INT_ENABLE_SDEV_REMOVED      = 0x80,
-        NV_INT_ENABLE_PDEV_HOTPLUG      = (NV_INT_ENABLE_PDEV_ADDED |
-                                           NV_INT_ENABLE_PDEV_REMOVED),
-        NV_INT_ENABLE_SDEV_HOTPLUG      = (NV_INT_ENABLE_SDEV_ADDED |
-                                           NV_INT_ENABLE_SDEV_REMOVED),
-        NV_INT_ENABLE_HOTPLUG           = (NV_INT_ENABLE_PDEV_HOTPLUG |
-                                           NV_INT_ENABLE_SDEV_HOTPLUG),
 
         NV_INT_CONFIG                   = 0x12,
         NV_INT_CONFIG_METHD             = 0x01, // 0 = INT, 1 = SMI
@@ -102,12 +90,6 @@ static irqreturn_t nv_interrupt (int irq, void *dev_instance,
 static u32 nv_scr_read (struct ata_port *ap, unsigned int sc_reg);
 static void nv_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
 static void nv_host_stop (struct ata_host_set *host_set);
-static void nv_enable_hotplug(struct ata_probe_ent *probe_ent);
-static void nv_disable_hotplug(struct ata_host_set *host_set);
-static int nv_check_hotplug(struct ata_host_set *host_set);
-static void nv_enable_hotplug_ck804(struct ata_probe_ent *probe_ent);
-static void nv_disable_hotplug_ck804(struct ata_host_set *host_set);
-static int nv_check_hotplug_ck804(struct ata_host_set *host_set);
 
 enum nv_host_type
 {
@@ -158,34 +140,18 @@ static const struct pci_device_id nv_pci_tbl[] = {
 struct nv_host_desc
 {
         enum nv_host_type       host_type;
-        void                    (*enable_hotplug)(struct ata_probe_ent *probe_ent);
-        void                    (*disable_hotplug)(struct ata_host_set *host_set);
-        int                     (*check_hotplug)(struct ata_host_set *host_set);
-
 };
 static struct nv_host_desc nv_device_tbl[] = {
         {
                 .host_type      = GENERIC,
-                .enable_hotplug = NULL,
-                .disable_hotplug= NULL,
-                .check_hotplug  = NULL,
         },
         {
                 .host_type      = NFORCE2,
-                .enable_hotplug = nv_enable_hotplug,
-                .disable_hotplug= nv_disable_hotplug,
-                .check_hotplug  = nv_check_hotplug,
         },
         {
                 .host_type      = NFORCE3,
-                .enable_hotplug = nv_enable_hotplug,
-                .disable_hotplug= nv_disable_hotplug,
-                .check_hotplug  = nv_check_hotplug,
         },
         {       .host_type      = CK804,
-                .enable_hotplug = nv_enable_hotplug_ck804,
-                .disable_hotplug= nv_disable_hotplug_ck804,
-                .check_hotplug  = nv_check_hotplug_ck804,
         },
 };
 
@@ -275,7 +241,6 @@ static irqreturn_t nv_interrupt (int irq, void *dev_instance,
                                  struct pt_regs *regs)
 {
         struct ata_host_set *host_set = dev_instance;
-        struct nv_host *host = host_set->private_data;
         unsigned int i;
         unsigned int handled = 0;
         unsigned long flags;
@@ -301,9 +266,6 @@ static irqreturn_t nv_interrupt (int irq, void *dev_instance,
 
         }
 
-        if (host->host_desc->check_hotplug)
-                handled += host->host_desc->check_hotplug(host_set);
-
         spin_unlock_irqrestore(&host_set->lock, flags);
 
         return IRQ_RETVAL(handled);
@@ -329,10 +291,6 @@ static void nv_host_stop (struct ata_host_set *host_set)
 {
         struct nv_host *host = host_set->private_data;
 
-        // Disable hotplug event interrupts.
-        if (host->host_desc->disable_hotplug)
-                host->host_desc->disable_hotplug(host_set);
-
         kfree(host);
 
         ata_pci_host_stop(host_set);
@@ -409,10 +367,6 @@ static int nv_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
         if (rc != NV_PORTS)
                 goto err_out_iounmap;
 
-        // Enable hotplug event interrupts.
-        if (host->host_desc->enable_hotplug)
-                host->host_desc->enable_hotplug(probe_ent);
-
         kfree(probe_ent);
 
         return 0;
@@ -432,129 +386,6 @@ err_out:
         return rc;
 }
 
-static void nv_enable_hotplug(struct ata_probe_ent *probe_ent)
-{
-        u8 intr_mask;
-
-        outb(NV_INT_STATUS_HOTPLUG,
-                probe_ent->port[0].scr_addr + NV_INT_STATUS);
-
-        intr_mask = inb(probe_ent->port[0].scr_addr + NV_INT_ENABLE);
-        intr_mask |= NV_INT_ENABLE_HOTPLUG;
-
-        outb(intr_mask, probe_ent->port[0].scr_addr + NV_INT_ENABLE);
-}
-
-static void nv_disable_hotplug(struct ata_host_set *host_set)
-{
-        u8 intr_mask;
-
-        intr_mask = inb(host_set->ports[0]->ioaddr.scr_addr + NV_INT_ENABLE);
-
-        intr_mask &= ~(NV_INT_ENABLE_HOTPLUG);
-
-        outb(intr_mask, host_set->ports[0]->ioaddr.scr_addr + NV_INT_ENABLE);
-}
-
-static int nv_check_hotplug(struct ata_host_set *host_set)
-{
-        u8 intr_status;
-
-        intr_status = inb(host_set->ports[0]->ioaddr.scr_addr + NV_INT_STATUS);
-
-        // Clear interrupt status.
-        outb(0xff, host_set->ports[0]->ioaddr.scr_addr + NV_INT_STATUS);
-
-        if (intr_status & NV_INT_STATUS_HOTPLUG) {
-                if (intr_status & NV_INT_STATUS_PDEV_ADDED)
-                        printk(KERN_WARNING "nv_sata: "
-                                "Primary device added\n");
-
-                if (intr_status & NV_INT_STATUS_PDEV_REMOVED)
-                        printk(KERN_WARNING "nv_sata: "
-                                "Primary device removed\n");
-
-                if (intr_status & NV_INT_STATUS_SDEV_ADDED)
-                        printk(KERN_WARNING "nv_sata: "
-                                "Secondary device added\n");
-
-                if (intr_status & NV_INT_STATUS_SDEV_REMOVED)
-                        printk(KERN_WARNING "nv_sata: "
-                                "Secondary device removed\n");
-
-                return 1;
-        }
-
-        return 0;
-}
-
-static void nv_enable_hotplug_ck804(struct ata_probe_ent *probe_ent)
-{
-        struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
-        u8 intr_mask;
-        u8 regval;
-
-        pci_read_config_byte(pdev, NV_MCP_SATA_CFG_20, &regval);
-        regval |= NV_MCP_SATA_CFG_20_SATA_SPACE_EN;
-        pci_write_config_byte(pdev, NV_MCP_SATA_CFG_20, regval);
-
-        writeb(NV_INT_STATUS_HOTPLUG, probe_ent->mmio_base + NV_INT_STATUS_CK804);
-
-        intr_mask = readb(probe_ent->mmio_base + NV_INT_ENABLE_CK804);
-        intr_mask |= NV_INT_ENABLE_HOTPLUG;
-
-        writeb(intr_mask, probe_ent->mmio_base + NV_INT_ENABLE_CK804);
-}
-
-static void nv_disable_hotplug_ck804(struct ata_host_set *host_set)
-{
-        struct pci_dev *pdev = to_pci_dev(host_set->dev);
-        u8 intr_mask;
-        u8 regval;
-
-        intr_mask = readb(host_set->mmio_base + NV_INT_ENABLE_CK804);
-
-        intr_mask &= ~(NV_INT_ENABLE_HOTPLUG);
-
-        writeb(intr_mask, host_set->mmio_base + NV_INT_ENABLE_CK804);
-
-        pci_read_config_byte(pdev, NV_MCP_SATA_CFG_20, &regval);
-        regval &= ~NV_MCP_SATA_CFG_20_SATA_SPACE_EN;
-        pci_write_config_byte(pdev, NV_MCP_SATA_CFG_20, regval);
-}
-
-static int nv_check_hotplug_ck804(struct ata_host_set *host_set)
-{
-        u8 intr_status;
-
-        intr_status = readb(host_set->mmio_base + NV_INT_STATUS_CK804);
-
-        // Clear interrupt status.
-        writeb(0xff, host_set->mmio_base + NV_INT_STATUS_CK804);
-
-        if (intr_status & NV_INT_STATUS_HOTPLUG) {
-                if (intr_status & NV_INT_STATUS_PDEV_ADDED)
-                        printk(KERN_WARNING "nv_sata: "
-                                "Primary device added\n");
-
-                if (intr_status & NV_INT_STATUS_PDEV_REMOVED)
-                        printk(KERN_WARNING "nv_sata: "
-                                "Primary device removed\n");
-
-                if (intr_status & NV_INT_STATUS_SDEV_ADDED)
-                        printk(KERN_WARNING "nv_sata: "
-                                "Secondary device added\n");
-
-                if (intr_status & NV_INT_STATUS_SDEV_REMOVED)
-                        printk(KERN_WARNING "nv_sata: "
-                                "Secondary device removed\n");
-
-                return 1;
-        }
-
-        return 0;
-}
-
 static int __init nv_init(void)
 {
         return pci_module_init(&nv_pci_driver);