diff options
| author | Yicong Yang <yangyicong@hisilicon.com> | 2020-03-13 17:53:47 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-04-17 10:50:10 +0200 |
| commit | 72d52a779e991f54767fa86d60ef7e3ab5b3e33b (patch) | |
| tree | bf7177520783c8af56a16c0dbe85759fa78eba21 /drivers/pci/pcie/aspm.c | |
| parent | 463181e64f5fe0ea4bf97e9e8d081b524f84c168 (diff) | |
PCI/ASPM: Clear the correct bits when enabling L1 substates
commit 58a3862a10a317a81097ab0c78aecebabb1704f5 upstream.
In pcie_config_aspm_l1ss(), we cleared the wrong bits when enabling ASPM L1
Substates. Instead of the L1.x enable bits (PCI_L1SS_CTL1_L1SS_MASK, 0xf), we
cleared the Link Activation Interrupt Enable bit (PCI_L1SS_CAP_L1_PM_SS,
0x10).
Clear the L1.x enable bits before writing the new L1.x configuration.
[bhelgaas: changelog]
Fixes: aeda9adebab8 ("PCI/ASPM: Configure L1 substate settings")
Link: https://lore.kernel.org/r/1584093227-1292-1-git-send-email-yangyicong@hisilicon.com
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: stable@vger.kernel.org # v4.11+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/pci/pcie/aspm.c')
| -rw-r--r-- | drivers/pci/pcie/aspm.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c index 652ef23bba35..32c34330e5a6 100644 --- a/drivers/pci/pcie/aspm.c +++ b/drivers/pci/pcie/aspm.c @@ -742,9 +742,9 @@ static void pcie_config_aspm_l1ss(struct pcie_link_state *link, u32 state) /* Enable what we need to enable */ pci_clear_and_set_dword(parent, up_cap_ptr + PCI_L1SS_CTL1, - PCI_L1SS_CAP_L1_PM_SS, val); + PCI_L1SS_CTL1_L1SS_MASK, val); pci_clear_and_set_dword(child, dw_cap_ptr + PCI_L1SS_CTL1, - PCI_L1SS_CAP_L1_PM_SS, val); + PCI_L1SS_CTL1_L1SS_MASK, val); } static void pcie_config_aspm_dev(struct pci_dev *pdev, u32 val) |