Commit ee17fd93 authored by Dely Sy's avatar Dely Sy Committed by Greg KH
Browse files

[PATCH] PCI Hotplug: Fix echoing 1 to power file of enabled slot problem with SHPC driver



Here is a patch to fix the problem of echoing 1 to "power" file
to enabled slot causing the slot to power down, and echoing 0
to disabled slot causing shpchp_disabled_slot() to be called
twice. This problem was reported by kenji Kaneshige.

Thanks,
Dely

Signed-off-by: default avatarDely Sy <dely.l.sy@intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent ff0d2f90
......@@ -95,7 +95,7 @@ static struct hotplug_slot_ops shpchp_hotplug_slot_ops = {
*/
static void release_slot(struct hotplug_slot *hotplug_slot)
{
struct slot *slot = (struct slot *)hotplug_slot->private;
struct slot *slot = hotplug_slot->private;
dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
......
......@@ -1885,7 +1885,7 @@ int shpchp_enable_slot (struct slot *p_slot)
func = shpchp_slot_find(p_slot->bus, p_slot->device, 0);
if (!func) {
dbg("%s: Error! slot NULL\n", __FUNCTION__);
return 1;
return -ENODEV;
}
/* Check to see if (latch closed, card present, power off) */
......@@ -1894,19 +1894,19 @@ int shpchp_enable_slot (struct slot *p_slot)
if (rc || !getstatus) {
info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number);
up(&p_slot->ctrl->crit_sect);
return 1;
return -ENODEV;
}
rc = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
if (rc || getstatus) {
info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number);
up(&p_slot->ctrl->crit_sect);
return 1;
return -ENODEV;
}
rc = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
if (rc || getstatus) {
info("%s: already enabled on slot(%x)\n", __FUNCTION__, p_slot->number);
up(&p_slot->ctrl->crit_sect);
return 1;
return -ENODEV;
}
up(&p_slot->ctrl->crit_sect);
......@@ -1914,7 +1914,7 @@ int shpchp_enable_slot (struct slot *p_slot)
func = shpchp_slot_create(p_slot->bus);
if (func == NULL)
return 1;
return -ENOMEM;
func->bus = p_slot->bus;
func->device = p_slot->device;
......@@ -1939,7 +1939,7 @@ int shpchp_enable_slot (struct slot *p_slot)
/* Setup slot structure with entry for empty slot */
func = shpchp_slot_create(p_slot->bus);
if (func == NULL)
return (1); /* Out of memory */
return -ENOMEM; /* Out of memory */
func->bus = p_slot->bus;
func->device = p_slot->device;
......@@ -1972,7 +1972,7 @@ int shpchp_disable_slot (struct slot *p_slot)
struct pci_func *func;
if (!p_slot->ctrl)
return 1;
return -ENODEV;
pci_bus = p_slot->ctrl->pci_dev->subordinate;
......@@ -1983,19 +1983,19 @@ int shpchp_disable_slot (struct slot *p_slot)
if (ret || !getstatus) {
info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number);
up(&p_slot->ctrl->crit_sect);
return 1;
return -ENODEV;
}
ret = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
if (ret || getstatus) {
info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number);
up(&p_slot->ctrl->crit_sect);
return 1;
return -ENODEV;
}
ret = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
if (ret || !getstatus) {
info("%s: already disabled slot(%x)\n", __FUNCTION__, p_slot->number);
up(&p_slot->ctrl->crit_sect);
return 1;
return -ENODEV;
}
up(&p_slot->ctrl->crit_sect);
......@@ -2011,7 +2011,7 @@ int shpchp_disable_slot (struct slot *p_slot)
/* Check the Class Code */
rc = pci_bus_read_config_byte (pci_bus, devfn, 0x0B, &class_code);
if (rc)
return rc;
return -ENODEV;
if (class_code == PCI_BASE_CLASS_DISPLAY) {
/* Display/Video adapter (not supported) */
......@@ -2020,13 +2020,13 @@ int shpchp_disable_slot (struct slot *p_slot)
/* See if it's a bridge */
rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_HEADER_TYPE, &header_type);
if (rc)
return rc;
return -ENODEV;
/* If it's a bridge, check the VGA Enable bit */
if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {
rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_BRIDGE_CONTROL, &BCR);
if (rc)
return rc;
return -ENODEV;
/* If the VGA Enable bit is set, remove isn't supported */
if (BCR & PCI_BRIDGE_CTL_VGA) {
......@@ -2042,12 +2042,12 @@ int shpchp_disable_slot (struct slot *p_slot)
if ((func != NULL) && !rc) {
rc = remove_board(func, p_slot->ctrl);
} else if (!rc)
rc = 1;
rc = -ENODEV;
if (p_slot)
update_slot_info(p_slot);
return(rc);
return rc;
}
......
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