evie/android_kernel_oneplus_msm8998
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Merge "msm: pcie: add mutex for PCIe enumeration"

Browse source
This commit is contained in:
Linux Build Service Account 2017-01-03 17:56:57 -08:00 • committed by Gerrit - the friendly Code Review server
commit 054b950dfd
1 changed files with 16 additions and 7 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

23
drivers/pci/host/pci-msm.c
View file

@ -589,6 +589,7 @@ struct msm_pcie_dev_t {
bool cfg_access;
spinlock_t cfg_lock;
unsigned long irqsave_flags;
struct mutex enumerate_lock;
struct mutex setup_lock;
struct irq_domain *irq_domain;
@ -4964,12 +4965,15 @@ int msm_pcie_enumerate(u32 rc_idx)
int ret = 0, bus_ret = 0, scan_ret = 0;
struct msm_pcie_dev_t *dev = &msm_pcie_dev[rc_idx];
mutex_lock(&dev->enumerate_lock);
PCIE_DBG(dev, "Enumerate RC%d\n", rc_idx);
if (!dev->drv_ready) {
PCIE_DBG(dev, "RC%d has not been successfully probed yet\n",
rc_idx);
return -EPROBE_DEFER;
ret = -EPROBE_DEFER;
goto out;
}
if (!dev->enumerated) {
@ -4996,8 +5000,7 @@ int msm_pcie_enumerate(u32 rc_idx)
PCIE_ERR(dev,
"PCIe: failed to get host bridge resources for RC%d: %d\n",
dev->rc_idx, ret);
return ret;
goto out;
}
bus = pci_create_root_bus(&dev->pdev->dev, 0,
@ -5008,8 +5011,8 @@ int msm_pcie_enumerate(u32 rc_idx)
PCIE_ERR(dev,
"PCIe: failed to create root bus for RC%d\n",
dev->rc_idx);
return -ENOMEM;
ret = -ENOMEM;
goto out;
}
scan_ret = pci_scan_child_bus(bus);
@ -5057,7 +5060,8 @@ int msm_pcie_enumerate(u32 rc_idx)
PCIE_ERR(dev,
"PCIe: Did not find PCI device for RC%d.\n",
dev->rc_idx);
return -ENODEV;
ret = -ENODEV;
goto out;
}
bus_ret = bus_for_each_dev(&pci_bus_type, NULL, dev,
@ -5067,7 +5071,8 @@ int msm_pcie_enumerate(u32 rc_idx)
PCIE_ERR(dev,
"PCIe: Failed to set up device table for RC%d\n",
dev->rc_idx);
return -ENODEV;
ret = -ENODEV;
goto out;
}
} else {
PCIE_ERR(dev, "PCIe: failed to enable RC%d.\n",
@ -5078,6 +5083,9 @@ int msm_pcie_enumerate(u32 rc_idx)
dev->rc_idx);
}
out:
mutex_unlock(&dev->enumerate_lock);
return ret;
}
EXPORT_SYMBOL(msm_pcie_enumerate);
@ -6436,6 +6444,7 @@ int __init pcie_init(void)
rc_name, i);
spin_lock_init(&msm_pcie_dev[i].cfg_lock);
msm_pcie_dev[i].cfg_access = true;
mutex_init(&msm_pcie_dev[i].enumerate_lock);
mutex_init(&msm_pcie_dev[i].setup_lock);
mutex_init(&msm_pcie_dev[i].recovery_lock);
spin_lock_init(&msm_pcie_dev[i].linkdown_lock);