From f146c7bc85a51f95c05e0f8173d484eb301ece78 Mon Sep 17 00:00:00 2001 From: Danilo Krummrich Date: Thu, 13 Aug 2026 18:52:04 +0200 Subject: PCI: Add pci_irq_type() to query the allocated interrupt type Add a helper that returns PCI_IRQ_MSIX, PCI_IRQ_MSI, or PCI_IRQ_INTX based on the interrupt type the PCI core selected after pci_alloc_irq_vectors(). Several drivers already open-code this check against pdev->msix_enabled and pdev->msi_enabled, or even open code this helper [1]. A common helper avoids the duplication and keeps drivers from accessing the bitfield directly (see also [2]). Acked-by: Bjorn Helgaas Tested-by: John Hubbard Link: https://elixir.bootlin.com/linux/v7.1/source/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c#L196 [1] Inspired-by: John Hubbard Link: https://lore.kernel.org/all/DKKG2QM3YJYB.Z2H2B2UXJ75N@kernel.org/ [2] Reviewed-by: Gary Guo Link: https://patch.msgid.link/20260813165234.620555-5-dakr@kernel.org [ Add missing pci_irq_type() stub for CONFIG_PCI=n. ] Signed-off-by: Danilo Krummrich --- include/asm-generic/bitops.h | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 include/asm-generic/bitops.h (limited to 'include/asm-generic/bitops.h') diff --git a/include/asm-generic/bitops.h b/include/asm-generic/bitops.h new file mode 100644 index 000000000..a47b8a71d --- /dev/null +++ b/include/asm-generic/bitops.h @@ -0,0 +1,38 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __ASM_GENERIC_BITOPS_H +#define __ASM_GENERIC_BITOPS_H + +/* + * For the benefit of those who are trying to port Linux to another + * architecture, here are some C-language equivalents. They should + * generate reasonable code, so take a look at what your compiler spits + * out before rolling your own buggy implementation in assembly language. + * + * C language equivalents written by Theodore Ts'o, 9/26/92 + */ + +#include +#include +#include + +#include +#include +#include +#include +#include + +#ifndef _LINUX_BITOPS_H +#error only can be included directly +#endif + +#include +#include +#include +#include + +#include +#include +#include +#include + +#endif /* __ASM_GENERIC_BITOPS_H */ -- cgit v1.3.1