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[PATCH] PCI: Fix PCI bus mastering enable problem in pciehp

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Martin Franc reported that the pciehp driver was not enabling bus
master capability on his hot-plugged card. pciehprm_enable_card()
was updating the PCI command register only if _HPP indicated a
value for SERR or PERR that was different from the current setting.
I don't have hardware that reproduces this problem, but Martin
reports that this patch fixes the problem for him.

Signed-off-by: Rajesh Shah <rajesh.shah@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
From rzarev@its.caltech.edu Tue Sep  6 18:29:50 2005
Date: Tue, 6 Sep 2005 13:39:32 -0700 (PDT)
From: Rumen Ivanov Zarev <rzarev@its.caltech.edu>
Message-Id: <200509062039.j86KdWMr014934@inky.its.caltech.edu>
To: gregkh@suse.de
Subject: PCI: Unhide SMBus on Compaq Evo N620c
Cc: linux-kernel@vger.kernel.org

Trivial patch against 2.6.13 to unhide SMBus on Compaq Evo N620c laptop using
Intel 82855PM chipset.

Signed-off-by: Rumen Zarev <rzarev@caltech.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
 drivers/pci/quirks.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- gregkh-2.6.orig/drivers/pci/quirks.c	2005-09-09 10:28:55.000000000 -0700
+++ gregkh-2.6/drivers/pci/quirks.c	2005-09-09 13:51:44.000000000 -0700
@@ -876,6 +876,12 @@ static void __init asus_hides_smbus_host
                        case 0xC00C: /* Samsung P35 notebook */
                                asus_hides_smbus = 1;
                        }
+	} else if (unlikely(dev->subsystem_vendor == PCI_VENDOR_ID_COMPAQ)) {
+		if (dev->device == PCI_DEVICE_ID_INTEL_82855PM_HB)
+			switch(dev->subsystem_device) {
+			case 0x0058: /* Compaq Evo N620c */
+				asus_hides_smbus = 1;
+			}
 	}
 }
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82845_HB,	asus_hides_smbus_hostbridge );
This commit is contained in:
Rajesh Shah 2005-08-16 17:32:04 -07:00 committed by Greg Kroah-Hartman
parent 144a50ea5e
commit 7c56075e60
1 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/pci/hotplug/pciehprm_acpi.c
View File

@ -1696,15 +1696,15 @@ void pciehprm_enable_card(
pci_bus->number = func->bus;
devfn = PCI_DEVFN(func->device, func->function);
rc = pci_bus_read_config_word(pci_bus, devfn, PCI_COMMAND, &command);
rc = pci_bus_read_config_word(pci_bus, devfn, PCI_COMMAND, &cmd);
if (card_type == PCI_HEADER_TYPE_BRIDGE) {
rc = pci_bus_read_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, &bcommand);
rc = pci_bus_read_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, &bcmd);
}
cmd = command = command | PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE
command = cmd | PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE
| PCI_COMMAND_IO | PCI_COMMAND_MEMORY;
bcmd = bcommand = bcommand | PCI_BRIDGE_CTL_NO_ISA;
bcommand = bcmd | PCI_BRIDGE_CTL_NO_ISA;
ab = find_acpi_bridge_by_bus(acpi_bridges_head, ctrl->seg, ctrl->bus);
if (ab) {