6.12-stable review patch. If anyone has any objections, please let me know.
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From: Philipp Stanner pstanner@redhat.com
[ Upstream commit dfa2f4d5f9e5d757700cefa8ee480099889f1c69 ]
pci_intx() is a hybrid function which can sometimes be managed through devres. This hybrid nature is undesirable.
Since all users of pci_intx() have by now been ported either to always-managed pcim_intx() or never-managed pci_intx_unmanaged(), the devres functionality can be removed from pci_intx().
Consequently, pci_intx_unmanaged() is now redundant, because pci_intx() itself is now unmanaged.
Remove the devres functionality from pci_intx(). Have all users of pci_intx_unmanaged() call pci_intx(). Remove pci_intx_unmanaged().
Link: https://lore.kernel.org/r/20241209130632.132074-13-pstanner@redhat.com Signed-off-by: Philipp Stanner pstanner@redhat.com Signed-off-by: Bjorn Helgaas bhelgaas@google.com Acked-by: Paolo Abeni pabeni@redhat.com Stable-dep-of: d555ed45a5a1 ("PCI: Restore original INTX_DISABLE bit by pcim_intx()") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/pci/devres.c | 4 ++-- drivers/pci/pci.c | 43 ++----------------------------------------- include/linux/pci.h | 1 - 3 files changed, 4 insertions(+), 44 deletions(-)
diff --git a/drivers/pci/devres.c b/drivers/pci/devres.c index c3699105656a7..70f1a46d07c5e 100644 --- a/drivers/pci/devres.c +++ b/drivers/pci/devres.c @@ -416,7 +416,7 @@ static void pcim_intx_restore(struct device *dev, void *data) struct pci_dev *pdev = to_pci_dev(dev); struct pcim_intx_devres *res = data;
- pci_intx_unmanaged(pdev, res->orig_intx); + pci_intx(pdev, res->orig_intx); }
static struct pcim_intx_devres *get_or_create_intx_devres(struct device *dev) @@ -453,7 +453,7 @@ int pcim_intx(struct pci_dev *pdev, int enable) return -ENOMEM;
res->orig_intx = !enable; - pci_intx_unmanaged(pdev, enable); + pci_intx(pdev, enable);
return 0; } diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 3916e0b23cdaf..1aa5d6f98ebda 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -4481,17 +4481,13 @@ void pci_disable_parity(struct pci_dev *dev) }
/** - * pci_intx_unmanaged - enables/disables PCI INTx for device dev, - * unmanaged version + * pci_intx - enables/disables PCI INTx for device dev * @pdev: the PCI device to operate on * @enable: boolean: whether to enable or disable PCI INTx * * Enables/disables PCI INTx for device @pdev - * - * This function behavios identically to pci_intx(), but is never managed with - * devres. */ -void pci_intx_unmanaged(struct pci_dev *pdev, int enable) +void pci_intx(struct pci_dev *pdev, int enable) { u16 pci_command, new;
@@ -4507,41 +4503,6 @@ void pci_intx_unmanaged(struct pci_dev *pdev, int enable)
pci_write_config_word(pdev, PCI_COMMAND, new); } -EXPORT_SYMBOL_GPL(pci_intx_unmanaged); - -/** - * pci_intx - enables/disables PCI INTx for device dev - * @pdev: the PCI device to operate on - * @enable: boolean: whether to enable or disable PCI INTx - * - * Enables/disables PCI INTx for device @pdev - * - * NOTE: - * This is a "hybrid" function: It's normally unmanaged, but becomes managed - * when pcim_enable_device() has been called in advance. This hybrid feature is - * DEPRECATED! If you want managed cleanup, use pcim_intx() instead. - */ -void pci_intx(struct pci_dev *pdev, int enable) -{ - u16 pci_command, new; - - pci_read_config_word(pdev, PCI_COMMAND, &pci_command); - - if (enable) - new = pci_command & ~PCI_COMMAND_INTX_DISABLE; - else - new = pci_command | PCI_COMMAND_INTX_DISABLE; - - if (new != pci_command) { - /* Preserve the "hybrid" behavior for backwards compatibility */ - if (pci_is_managed(pdev)) { - WARN_ON_ONCE(pcim_intx(pdev, enable) != 0); - return; - } - - pci_write_config_word(pdev, PCI_COMMAND, new); - } -} EXPORT_SYMBOL_GPL(pci_intx);
/** diff --git a/include/linux/pci.h b/include/linux/pci.h index 6ef32a8d146b1..74114acbb07fb 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1353,7 +1353,6 @@ int __must_check pcim_set_mwi(struct pci_dev *dev); int pci_try_set_mwi(struct pci_dev *dev); void pci_clear_mwi(struct pci_dev *dev); void pci_disable_parity(struct pci_dev *dev); -void pci_intx_unmanaged(struct pci_dev *pdev, int enable); void pci_intx(struct pci_dev *dev, int enable); bool pci_check_and_mask_intx(struct pci_dev *dev); bool pci_check_and_unmask_intx(struct pci_dev *dev);