diff options
| author | Casey Leedom <leedom@chelsio.com> | 2013-08-06 12:18:36 +0200 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2013-08-12 21:47:09 +0200 |
| commit | 3775a209d38aa3a0c7ed89a7d0f529e0230f280e (patch) | |
| tree | c3d6d6e76b2ddbfba682d613b131e7341afa396e /drivers/pci | |
| parent | Linux 3.11-rc2 (diff) | |
| download | linux-3775a209d38aa3a0c7ed89a7d0f529e0230f280e.tar.xz linux-3775a209d38aa3a0c7ed89a7d0f529e0230f280e.zip | |
PCI: Add pci_wait_for_pending_transaction()
New routine to avoid duplication of code to wait for pending PCI
transactions to complete.
Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Vipul Pandya <vipul@chelsio.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/pci.c | 38 |
1 files changed, 25 insertions, 13 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index e37fea6e178d..10ab64e8878e 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -3098,19 +3098,17 @@ int pci_set_dma_seg_boundary(struct pci_dev *dev, unsigned long mask) } EXPORT_SYMBOL(pci_set_dma_seg_boundary); -static int pcie_flr(struct pci_dev *dev, int probe) +/** + * pci_wait_for_pending_transaction - waits for pending transaction + * @dev: the PCI device to operate on + * + * Return 0 if transaction is pending 1 otherwise. + */ +int pci_wait_for_pending_transaction(struct pci_dev *dev) { int i; - u32 cap; u16 status; - pcie_capability_read_dword(dev, PCI_EXP_DEVCAP, &cap); - if (!(cap & PCI_EXP_DEVCAP_FLR)) - return -ENOTTY; - - if (probe) - return 0; - /* Wait for Transaction Pending bit clean */ for (i = 0; i < 4; i++) { if (i) @@ -3118,13 +3116,27 @@ static int pcie_flr(struct pci_dev *dev, int probe) pcie_capability_read_word(dev, PCI_EXP_DEVSTA, &status); if (!(status & PCI_EXP_DEVSTA_TRPND)) - goto clear; + return 1; } - dev_err(&dev->dev, "transaction is not cleared; " - "proceeding with reset anyway\n"); + return 0; +} +EXPORT_SYMBOL(pci_wait_for_pending_transaction); + +static int pcie_flr(struct pci_dev *dev, int probe) +{ + u32 cap; + + pcie_capability_read_dword(dev, PCI_EXP_DEVCAP, &cap); + if (!(cap & PCI_EXP_DEVCAP_FLR)) + return -ENOTTY; + + if (probe) + return 0; + + if (!pci_wait_for_pending_transaction(dev)) + dev_err(&dev->dev, "transaction is not cleared; proceeding with reset anyway\n"); -clear: pcie_capability_set_word(dev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_BCR_FLR); msleep(100); |