lkml.org 
[lkml]   [2013]   [May]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Subject[RFC PATCH 5/8] pci: Add reset_slot option to pci_dev_reset
    From
    Date
    If the hotplug controller provides a way to reset a slot, use that
    before a direct parent bus reset.

    Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
    ---
    drivers/pci/pci.c | 19 +++++++++++++++++++
    1 file changed, 19 insertions(+)

    diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
    index 7250ca7..eb50d90 100644
    --- a/drivers/pci/pci.c
    +++ b/drivers/pci/pci.c
    @@ -22,6 +22,7 @@
    #include <linux/interrupt.h>
    #include <linux/device.h>
    #include <linux/pm_runtime.h>
    +#include <linux/pci_hotplug.h>
    #include <asm-generic/pci-bridge.h>
    #include <asm/setup.h>
    #include "pci.h"
    @@ -3246,6 +3247,20 @@ static int pci_parent_bus_reset(struct pci_dev *dev, int probe)
    return 0;
    }

    +static int pci_dev_reset_slot_function(struct pci_dev *dev, int probe)
    +{
    + struct pci_dev *pdev;
    +
    + if (dev->subordinate || !dev->slot)
    + return -ENOTTY;
    +
    + list_for_each_entry(pdev, &dev->bus->devices, bus_list)
    + if (pdev != dev && pdev->slot == dev->slot)
    + return -ENOTTY;
    +
    + return pci_hp_reset_slot(dev->slot->hotplug, probe);
    +}
    +
    static int __pci_dev_reset(struct pci_dev *dev, int probe)
    {
    int rc;
    @@ -3268,6 +3283,10 @@ static int __pci_dev_reset(struct pci_dev *dev, int probe)
    if (rc != -ENOTTY)
    goto done;

    + rc = pci_dev_reset_slot_function(dev, probe);
    + if (rc != -ENOTTY)
    + goto done;
    +
    rc = pci_parent_bus_reset(dev, probe);
    done:
    return rc;


    \
     
     \ /
      Last update: 2013-05-01 21:21    [W:4.683 / U:0.000 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site