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PCI: pciehp: remove crit_sect mutex 

The crit_sect mutex defined in struct controller is to serialize
hot-plug operations against multiple slots under the same bus. But,
since PCIe doesnstream port has only one slot at most, it is
meaningless and we don't need it.

Acked-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
hifive-unleashed-5.1
Kenji Kaneshige 2009-09-15 17:29:49 +09:00 committed by Jesse Barnes
parent 5f9cab7af6
commit 6aaa6d06f5
3 changed files with 0 additions and 16 deletions
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1
drivers/pci/hotplug/pciehp.h
View File

@ -88,7 +88,6 @@ struct event_info {
};
struct controller {
struct mutex crit_sect; /* critical section mutex */
struct mutex ctrl_lock; /* controller lock */
struct pci_dev *pci_dev;
struct pcie_device *pcie; /* PCI Express port service */

14
drivers/pci/hotplug/pciehp_ctrl.c
View File

@ -519,13 +519,9 @@ int pciehp_enable_slot(struct slot *p_slot)
int rc;
struct controller *ctrl = p_slot->ctrl;
/* Check to see if (latch closed, card present, power off) */
mutex_lock(&p_slot->ctrl->crit_sect);
rc = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
if (rc || !getstatus) {
ctrl_info(ctrl, "No adapter on slot(%s)\n", slot_name(p_slot));
mutex_unlock(&p_slot->ctrl->crit_sect);
return -ENODEV;
}
if (MRL_SENS(p_slot->ctrl)) {
@ -533,7 +529,6 @@ int pciehp_enable_slot(struct slot *p_slot)
if (rc || getstatus) {
ctrl_info(ctrl, "Latch open on slot(%s)\n",
slot_name(p_slot));
mutex_unlock(&p_slot->ctrl->crit_sect);
return -ENODEV;
}
}
@ -543,7 +538,6 @@ int pciehp_enable_slot(struct slot *p_slot)
if (rc || getstatus) {
ctrl_info(ctrl, "Already enabled on slot(%s)\n",
slot_name(p_slot));
mutex_unlock(&p_slot->ctrl->crit_sect);
return -EINVAL;
}
}
@ -557,7 +551,6 @@ int pciehp_enable_slot(struct slot *p_slot)
update_slot_info(p_slot);
mutex_unlock(&p_slot->ctrl->crit_sect);
return rc;
}
@ -571,15 +564,11 @@ int pciehp_disable_slot(struct slot *p_slot)
if (!p_slot->ctrl)
return 1;
/* Check to see if (latch closed, card present, power on) */
mutex_lock(&p_slot->ctrl->crit_sect);
if (!HP_SUPR_RM(p_slot->ctrl)) {
ret = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
if (ret || !getstatus) {
ctrl_info(ctrl, "No adapter on slot(%s)\n",
slot_name(p_slot));
mutex_unlock(&p_slot->ctrl->crit_sect);
return -ENODEV;
}
}
@ -589,7 +578,6 @@ int pciehp_disable_slot(struct slot *p_slot)
if (ret || getstatus) {
ctrl_info(ctrl, "Latch open on slot(%s)\n",
slot_name(p_slot));
mutex_unlock(&p_slot->ctrl->crit_sect);
return -ENODEV;
}
}
@ -599,7 +587,6 @@ int pciehp_disable_slot(struct slot *p_slot)
if (ret || !getstatus) {
ctrl_info(ctrl, "Already disabled on slot(%s)\n",
slot_name(p_slot));
mutex_unlock(&p_slot->ctrl->crit_sect);
return -EINVAL;
}
}
@ -607,7 +594,6 @@ int pciehp_disable_slot(struct slot *p_slot)
ret = remove_board(p_slot);
update_slot_info(p_slot);
mutex_unlock(&p_slot->ctrl->crit_sect);
return ret;
}

1
drivers/pci/hotplug/pciehp_hpc.c
View File

@ -1017,7 +1017,6 @@ struct controller *pcie_init(struct pcie_device *dev)
ctrl->slot_cap = slot_cap;
ctrl->hpc_ops = &pciehp_hpc_ops;
mutex_init(&ctrl->crit_sect);
mutex_init(&ctrl->ctrl_lock);
init_waitqueue_head(&ctrl->queue);
dbg_ctrl(ctrl);