diff options
| author | Lukas Wunner <lukas@wunner.de> | 2018-07-20 00:27:46 +0200 |
|---|---|---|
| committer | Bjorn Helgaas <helgaas@kernel.org> | 2018-07-24 00:04:15 +0200 |
| commit | 1656716d45d0aae8c0a21a0553b9d27cd98fda61 (patch) | |
| tree | 949a72be5647e6bec3daf6fa9b5e1799ce24993e /drivers/pci/hotplug/pciehp_ctrl.c | |
| parent | PCI: pciehp: Enable/disable exclusively from IRQ thread (diff) | |
| download | linux-1656716d45d0aae8c0a21a0553b9d27cd98fda61.tar.xz linux-1656716d45d0aae8c0a21a0553b9d27cd98fda61.zip | |
PCI: pciehp: Drop enable/disable lock
Previously slot enablement and disablement could happen concurrently.
But now it's under the exclusive control of the IRQ thread, rendering
the locking obsolete. Drop it.
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/hotplug/pciehp_ctrl.c')
| -rw-r--r-- | drivers/pci/hotplug/pciehp_ctrl.c | 11 |
1 files changed, 0 insertions, 11 deletions
diff --git a/drivers/pci/hotplug/pciehp_ctrl.c b/drivers/pci/hotplug/pciehp_ctrl.c index 70bad847a450..8ba937599fb3 100644 --- a/drivers/pci/hotplug/pciehp_ctrl.c +++ b/drivers/pci/hotplug/pciehp_ctrl.c @@ -277,9 +277,6 @@ void pciehp_handle_presence_change(struct slot *slot) } } -/* - * Note: This function must be called with slot->hotplug_lock held - */ static int __pciehp_enable_slot(struct slot *p_slot) { u8 getstatus = 0; @@ -316,10 +313,7 @@ int pciehp_enable_slot(struct slot *slot) struct controller *ctrl = slot->ctrl; int ret; - mutex_lock(&slot->hotplug_lock); ret = __pciehp_enable_slot(slot); - mutex_unlock(&slot->hotplug_lock); - if (ret && ATTN_BUTTN(ctrl)) pciehp_green_led_off(slot); /* may be blinking */ @@ -330,9 +324,6 @@ int pciehp_enable_slot(struct slot *slot) return ret; } -/* - * Note: This function must be called with slot->hotplug_lock held - */ static int __pciehp_disable_slot(struct slot *p_slot) { u8 getstatus = 0; @@ -355,9 +346,7 @@ int pciehp_disable_slot(struct slot *slot) { int ret; - mutex_lock(&slot->hotplug_lock); ret = __pciehp_disable_slot(slot); - mutex_unlock(&slot->hotplug_lock); mutex_lock(&slot->lock); slot->state = OFF_STATE; |