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pci-v5.16-fixes-1

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Merge tag 'pci-v5.16-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI fixes from Bjorn Helgaas:
 "Revert conversion to struct device.driver instead of struct
  pci_dev.driver.

  The device.driver is set earlier, and using it caused the PCI core to
  call driver PM entry points before .probe() and after .remove(), when
  the driver isn't prepared.

  This caused NULL pointer dereferences in i2c_designware_pci and
  probably other driver issues"

* tag 'pci-v5.16-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  Revert "PCI: Use to_pci_driver() instead of pci_dev->driver"
  Revert "PCI: Remove struct pci_dev->driver"
This commit is contained in:
Linus Torvalds 2021-11-11 15:10:18 -08:00
commit 5833291ab6
5 changed files with 42 additions and 45 deletions
Download patch file Download diff file Expand all files Collapse all files

17
drivers/pci/pci.c
View file

@ -5135,14 +5135,13 @@ EXPORT_SYMBOL_GPL(pci_dev_unlock);
static void pci_dev_save_and_disable(struct pci_dev *dev)
{
struct pci_driver *drv = to_pci_driver(dev->dev.driver);
const struct pci_error_handlers *err_handler =
drv ? drv->err_handler : NULL;
dev->driver ? dev->driver->err_handler : NULL;
/*
* drv->err_handler->reset_prepare() is protected against races
* with ->remove() by the device lock, which must be held by the
* caller.
* dev->driver->err_handler->reset_prepare() is protected against
* races with ->remove() by the device lock, which must be held by
* the caller.
*/
if (err_handler && err_handler->reset_prepare)
err_handler->reset_prepare(dev);
@ -5167,15 +5166,15 @@ static void pci_dev_save_and_disable(struct pci_dev *dev)
static void pci_dev_restore(struct pci_dev *dev)
{
struct pci_driver *drv = to_pci_driver(dev->dev.driver);
const struct pci_error_handlers *err_handler =
drv ? drv->err_handler : NULL;
dev->driver ? dev->driver->err_handler : NULL;
pci_restore_state(dev);
/*
* drv->err_handler->reset_done() is protected against races with
* ->remove() by the device lock, which must be held by the caller.
* dev->driver->err_handler->reset_done() is protected against
* races with ->remove() by the device lock, which must be held by
* the caller.
*/
if (err_handler && err_handler->reset_done)
err_handler->reset_done(dev);