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PCI: pciehp: Always protect pciehp_disable_slot() with hotplug mutex 

When called from pciehp_sysfs_disable_slot(), the call to
pciehp_disable_slot() was not protected by the hotplug mutex.

Hold slot->hotplug_lock while calling pciehp_disable_slot().

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Rajat Jain <rajatxjain@gmail.com>
This commit is contained in:
Guenter Roeck 2015-11-01 13:58:40 -08:00 committed by Bjorn Helgaas
parent 1ec218373b
commit 64609eaab2
1 changed files with 2 additions and 0 deletions
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2
drivers/pci/hotplug/pciehp_ctrl.c
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@ -511,7 +511,9 @@ int pciehp_sysfs_disable_slot(struct slot *p_slot)
case STATIC_STATE:
p_slot->state = POWEROFF_STATE;
mutex_unlock(&p_slot->lock);
mutex_lock(&p_slot->hotplug_lock);
retval = pciehp_disable_slot(p_slot);
mutex_unlock(&p_slot->hotplug_lock);
mutex_lock(&p_slot->lock);
p_slot->state = STATIC_STATE;
break;