Messages in this thread Patch in this message | | | From | Jan Glauber <> | Subject | [PATCH v2 2/3] PCI: Avoid bus reset for Cavium cn8xxx root ports | Date | Thu, 17 Aug 2017 10:14:22 +0200 |
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From: David Daney <david.daney@cavium.com>
Root ports of cn8xxx do not function after bus reset when used with some e1000e and LSI HBA devices. Add a quirk to prevent bus reset on these root ports.
Signed-off-by: David Daney <david.daney@cavium.com> [jglauber@cavium.com: fixed typo and whitespaces] Signed-off-by: Jan Glauber <jglauber@cavium.com> --- drivers/pci/quirks.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 6967c6b..85191b8 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -3364,6 +3364,14 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x0032, quirk_no_bus_reset); DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x003c, quirk_no_bus_reset); DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x0033, quirk_no_bus_reset); +/* + * Root port on some Cavium CN8xxx chips do not successfully complete + * a bus reset when used with certain types of child devices. Config + * space access to the child may quit responding. Flag the root port + * as not supporting bus reset. + */ +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_CAVIUM, 0xa100, quirk_no_bus_reset); + static void quirk_no_pm_reset(struct pci_dev *dev) { /* -- 2.9.0.rc0.21.g7777322
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