diff options
| -rw-r--r-- | drivers/pci/devres.c | 24 | ||||
| -rw-r--r-- | drivers/pci/pci.c | 29 | ||||
| -rw-r--r-- | include/linux/pci.h | 2 |
3 files changed, 34 insertions, 21 deletions
diff --git a/drivers/pci/devres.c b/drivers/pci/devres.c index 609a9c5531a3..f9b93d1147f1 100644 --- a/drivers/pci/devres.c +++ b/drivers/pci/devres.c @@ -411,31 +411,12 @@ static inline bool mask_contains_bar(int mask, int bar) return mask & BIT(bar); } -/* - * This is a copy of pci_intx() used to bypass the problem of recursive - * function calls due to the hybrid nature of pci_intx(). - */ -static void __pcim_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) - pci_write_config_word(pdev, PCI_COMMAND, new); -} - static void pcim_intx_restore(struct device *dev, void *data) { struct pci_dev *pdev = to_pci_dev(dev); struct pcim_intx_devres *res = data; - __pcim_intx(pdev, res->orig_intx); + pci_intx_unmanaged(pdev, res->orig_intx); } static struct pcim_intx_devres *get_or_create_intx_devres(struct device *dev) @@ -472,10 +453,11 @@ int pcim_intx(struct pci_dev *pdev, int enable) return -ENOMEM; res->orig_intx = !enable; - __pcim_intx(pdev, enable); + pci_intx_unmanaged(pdev, enable); return 0; } +EXPORT_SYMBOL_GPL(pcim_intx); static void pcim_disable_device(void *pdev_raw) { diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index c9565c7d58f0..3f384e9137e3 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -4480,6 +4480,35 @@ void pci_disable_parity(struct pci_dev *dev) } /** + * pci_intx_unmanaged - enables/disables PCI INTx for device dev, + * unmanaged version + * @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) +{ + 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) + return; + + 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 diff --git a/include/linux/pci.h b/include/linux/pci.h index db9b47ce3eef..b5eb8bda655d 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1350,6 +1350,7 @@ 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); @@ -2297,6 +2298,7 @@ static inline void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev) { } #endif +int pcim_intx(struct pci_dev *pdev, int enabled); int pcim_request_all_regions(struct pci_dev *pdev, const char *name); void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen); void __iomem *pcim_iomap_region(struct pci_dev *pdev, int bar, |