diff options
| author | Rajat Jain <rajatxjain@gmail.com> | 2014-02-18 18:53:19 -0800 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2014-02-19 15:04:14 -0700 |
| commit | 2b3940b60626ac4932fa048cc74f2a872cc4bfb4 (patch) | |
| tree | 290a5e787a7946d6b685bcf98f3017ffe970db01 /drivers/pci/hotplug | |
| parent | 50277c8b06d56f2345e1a0693db46db29fc6d063 (diff) | |
| download | talos-obmc-linux-2b3940b60626ac4932fa048cc74f2a872cc4bfb4.tar.gz talos-obmc-linux-2b3940b60626ac4932fa048cc74f2a872cc4bfb4.zip | |
PCI: pciehp: Remove a non-existent card, regardless of "surprise" capability
In case a card is physically yanked out, it should immediately be removed,
regardless of the "surprise" capability bit. Thus:
- Always handle the physical removal - regardless of the "surprise" bit.
- Don't use "surprise" capability when making decisions about enabling
presence detect notifications.
- Reword the comments to indicate the intent.
Signed-off-by: Rajat Jain <rajatxjain@gmail.com>
Signed-off-by: Rajat Jain <rajatjain@juniper.net>
Signed-off-by: Guenter Roeck <groeck@juniper.net>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/hotplug')
| -rw-r--r-- | drivers/pci/hotplug/pciehp_ctrl.c | 9 | ||||
| -rw-r--r-- | drivers/pci/hotplug/pciehp_hpc.c | 9 |
2 files changed, 13 insertions, 5 deletions
diff --git a/drivers/pci/hotplug/pciehp_ctrl.c b/drivers/pci/hotplug/pciehp_ctrl.c index b4a4ac150e61..0c2e524a1cf0 100644 --- a/drivers/pci/hotplug/pciehp_ctrl.c +++ b/drivers/pci/hotplug/pciehp_ctrl.c @@ -535,9 +535,16 @@ static void interrupt_event_handler(struct work_struct *work) pciehp_green_led_off(p_slot); break; case INT_PRESENCE_ON: - case INT_PRESENCE_OFF: if (!HP_SUPR_RM(ctrl)) break; + ctrl_dbg(ctrl, "Surprise Insertion\n"); + handle_surprise_event(p_slot); + break; + case INT_PRESENCE_OFF: + /* + * Regardless of surprise capability, we need to + * definitely remove a card that has been pulled out! + */ ctrl_dbg(ctrl, "Surprise Removal\n"); handle_surprise_event(p_slot); break; diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c index da4b0204b4f7..d7d058fa19a4 100644 --- a/drivers/pci/hotplug/pciehp_hpc.c +++ b/drivers/pci/hotplug/pciehp_hpc.c @@ -619,9 +619,10 @@ static void pcie_disable_notification(struct controller *ctrl) /* * pciehp has a 1:1 bus:slot relationship so we ultimately want a secondary - * bus reset of the bridge, but if the slot supports surprise removal (or - * link state change based hotplug), we need to disable presence detection - * (or link state notifications) around the bus reset and clear any spurious + * bus reset of the bridge, but at the same time we want to ensure that it is + * not seen as a hot-unplug, followed by the hot-plug of the device. Thus, + * disable link state notification and presence detection change notification + * momentarily, if we see that they could interfere. Also, clear any spurious * events after. */ int pciehp_reset_slot(struct slot *slot, int probe) @@ -633,7 +634,7 @@ int pciehp_reset_slot(struct slot *slot, int probe) if (probe) return 0; - if (HP_SUPR_RM(ctrl) && !ATTN_BUTTN(ctrl)) { + if (!ATTN_BUTTN(ctrl)) { ctrl_mask |= PCI_EXP_SLTCTL_PDCE; stat_mask |= PCI_EXP_SLTSTA_PDC; } |
