ChangeSet 1.1722.103.3, 2004/06/11 17:15:00-07:00, bjorn.helgaas@hp.com [PATCH] PCI: clarify pci.txt wrt IRQ allocation I think we should make it explicit that PCI IRQs shouldn't be relied upon until after pci_enable_device(). This patch: ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.7-rc3/2.6.7-rc3-mm1/broken-out/bk-acpi.patch does PCI interrupt routing (based on ACPI _PRT) and IRQ allocation at pci_enable_device()-time. (To avoid breaking things in 2.6, the above patch still allocates all PCI IRQs in pci_acpi_init(), before any drivers are initialized. But that shouldn't be needed by correct drivers, and I'd like to remove it in 2.7.) Signed-off-by: Greg Kroah-Hartman Documentation/pci.txt | 5 +++-- 1 files changed, 3 insertions(+), 2 deletions(-) diff -Nru a/Documentation/pci.txt b/Documentation/pci.txt --- a/Documentation/pci.txt 2004-06-24 13:51:35 -07:00 +++ b/Documentation/pci.txt 2004-06-24 13:51:35 -07:00 @@ -166,8 +166,9 @@ ~~~~~~~~~~~~~~~~~~~ Before you do anything with the device you've found, you need to enable it by calling pci_enable_device() which enables I/O and memory regions of -the device, assigns missing resources if needed and wakes up the device -if it was in suspended state. Please note that this function can fail. +the device, allocates an IRQ if necessary, assigns missing resources if +needed and wakes up the device if it was in suspended state. Please note +that this function can fail. If you want to use the device in bus mastering mode, call pci_set_master() which enables the bus master bit in PCI_COMMAND register and also fixes