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| author | Ley Foon Tan <lftan@altera.com> | 2016-06-21 16:53:12 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-01-16 22:16:11 +0100 |
| commit | cb3ff0382e582c823cbd2ba549b7754c6416ab78 (patch) | |
| tree | a8d446af9911a0e9306dd3a7c18d696486e67139 /drivers | |
| parent | 9efffbc8191dd989065d4cf12e50d2abc84bd1fb (diff) | |
| download | linux-stable-cb3ff0382e582c823cbd2ba549b7754c6416ab78.tar.gz linux-stable-cb3ff0382e582c823cbd2ba549b7754c6416ab78.tar.bz2 linux-stable-cb3ff0382e582c823cbd2ba549b7754c6416ab78.zip | |
PCI: altera: Check link status before retrain link
commit c622032ebc538cb3869c312ae3ad235a99da84b6 upstream.
Check the link status before retraining. If the link is not up, don't
bother trying to retrain it.
[bhelgaas: split code move to separate patch, changelog]
Signed-off-by: Ley Foon Tan <lftan@altera.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Claudius Heine <claudius.heine.ext@siemens.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/pci/host/pcie-altera.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/pci/host/pcie-altera.c b/drivers/pci/host/pcie-altera.c index a1e782263dec..b61025ee07de 100644 --- a/drivers/pci/host/pcie-altera.c +++ b/drivers/pci/host/pcie-altera.c @@ -100,6 +100,10 @@ static bool altera_pcie_link_is_up(struct altera_pcie *pcie) static void altera_pcie_retrain(struct pci_dev *dev) { u16 linkcap, linkstat; + struct altera_pcie *pcie = dev->bus->sysdata; + + if (!altera_pcie_link_is_up(pcie)) + return; /* * Set the retrain bit if the PCIe rootport support > 2.5GB/s, but |