From akpm@linux-foundation.org Sun Feb 25 04:36:15 2007 Date: Sun, 25 Feb 2007 04:36:01 -0800 From: Tejun Heo Subject: PCI: allow multiple calls to pcim_pin_device() To: mm-commits@vger.kernel.org Cc: htejun@gmail.com, greg@kroah.com, ian.mcdonald@jandi.co.nz Message-ID: <200702251236.l1PCa3G6029387@shell0.pdx.osdl.net> From: Tejun Heo Sanity check in pcim_pin_device() was too restrictive in that it didn't allow multiple calls to the function, which is against the devres philosohpy of fire-and-forget. Track pinned status separately and allow pinning multiple times. Signed-off-by: Tejun Heo Acked-by: Ian McDonald Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman --- drivers/pci/pci.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) --- gregkh-2.6.orig/drivers/pci/pci.c +++ gregkh-2.6/drivers/pci/pci.c @@ -757,7 +757,8 @@ int pci_enable_device(struct pci_dev *de * when a device is enabled using managed PCI device enable interface. */ struct pci_devres { - unsigned int disable:1; + unsigned int enabled:1; + unsigned int pinned:1; unsigned int orig_intx:1; unsigned int restore_intx:1; u32 region_mask; @@ -781,7 +782,7 @@ static void pcim_release(struct device * if (this->restore_intx) pci_intx(dev, this->orig_intx); - if (this->disable) + if (this->enabled && !this->pinned) pci_disable_device(dev); } @@ -820,12 +821,12 @@ int pcim_enable_device(struct pci_dev *p dr = get_pci_dr(pdev); if (unlikely(!dr)) return -ENOMEM; - WARN_ON(!!dr->disable); + WARN_ON(!!dr->enabled); rc = pci_enable_device(pdev); if (!rc) { pdev->is_managed = 1; - dr->disable = 1; + dr->enabled = 1; } return rc; } @@ -843,9 +844,9 @@ void pcim_pin_device(struct pci_dev *pde struct pci_devres *dr; dr = find_pci_dr(pdev); - WARN_ON(!dr || !dr->disable); + WARN_ON(!dr || !dr->enabled); if (dr) - dr->disable = 0; + dr->pinned = 1; } /** @@ -876,7 +877,7 @@ pci_disable_device(struct pci_dev *dev) dr = find_pci_dr(dev); if (dr) - dr->disable = 0; + dr->enabled = 0; if (atomic_sub_return(1, &dev->enable_cnt) != 0) return;