From mboxrd@z Thu Jan 1 00:00:00 1970 From: okaya@codeaurora.org (Sinan Kaya) Date: Wed, 23 Aug 2017 00:56:08 -0400 Subject: [PATCH V12 2/5] PCI: add pci_bus_crs_visibility_pending() function to detect CRS response In-Reply-To: <1503464171-6471-1-git-send-email-okaya@codeaurora.org> References: <1503464171-6471-1-git-send-email-okaya@codeaurora.org> Message-ID: <1503464171-6471-2-git-send-email-okaya@codeaurora.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org We need a wrapper function to determine when a particular device is returning Configuration Request Retry Status (CRS) response. This will only happen if the root port supports CRS visibility. Signed-off-by: Sinan Kaya --- drivers/pci/pci.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 22e0617..7fa583a 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -235,6 +235,10 @@ enum pci_bar_type { pci_bar_mem64, /* A 64-bit memory BAR */ }; +static inline bool pci_bus_crs_visibility_pending(u32 l) +{ + return (l & 0xffff) == 0x0001; +} bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl, int crs_timeout); int pci_setup_device(struct pci_dev *dev); -- 1.9.1