This patch doesn't apply to the .36 stable tree If someone wants it applied there, please email the backport to [email protected]
thanks, greg k-h > commit: 49c2fa08a77a7eefa4cbc73601f64984aceacfa7 > From: Neil Horman <[email protected]> > Date: Wed, 8 Dec 2010 09:47:48 -0500 > Subject: [PATCH] PCI: Update MCP55 quirk to not affect non HyperTransport > variants > MIME-Version: 1.0 > Content-Type: text/plain; charset=UTF-8 > Content-Transfer-Encoding: 8bit > > I wrote this quirk awhile ago to properly setup MCP55 chips on hypertransport > busses so that interrupts reached whatever cpu happend to boot the kdump > kernel. > while that works well, it was recently shown to me that a a non-hypertransport > variant of the MCP55 exists, and on those system the register that this quirk > manipulates causes hangs if you write to it. Since the quirk was only meant > to > handle errors found on MCP55 chips that have a HT interface, this patch adds a > filter to make sure the chip is an HT capable before making the needed > register > adjustment. This lets the broken MCP55s work with kdump while not breaking > the > non-HT variants. > > Resolves https://bugzilla.kernel.org/show_bug.cgi?id=23952 > > Tested successfully by the reporter and myself. > > Cc: [email protected] > Reported-by: Mathieu B??rard <[email protected]> > Acked-by: Vivek Goyal <[email protected]> > Signed-off-by: Neil Horman <[email protected]> > Signed-off-by: Jesse Barnes <[email protected]> > --- > drivers/pci/quirks.c | 3 +++ > 1 files changed, 3 insertions(+), 0 deletions(-) > > diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c > index 6f9350c..313c0bd 100644 > --- a/drivers/pci/quirks.c > +++ b/drivers/pci/quirks.c > @@ -2329,6 +2329,9 @@ static void __devinit > nvbridge_check_legacy_irq_routing(struct pci_dev *dev) > { > u32 cfg; > > + if (!pci_find_capability(dev, PCI_CAP_ID_HT)) > + return; > + > pci_read_config_dword(dev, 0x74, &cfg); > > if (cfg & ((1 << 2) | (1 << 15))) { > > _______________________________________________ > stable mailing list > [email protected] > http://linux.kernel.org/mailman/listinfo/stable _______________________________________________ stable mailing list [email protected] http://linux.kernel.org/mailman/listinfo/stable
