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Date: Sun, 11 Aug 2019 18:07:56 +0300 From: Denis Efremov <efremov@...ux.com> To: Bjorn Helgaas <bhelgaas@...gle.com> Cc: Denis Efremov <efremov@...ux.com>, Sebastian Ott <sebott@...ux.ibm.com>, Gerald Schaefer <gerald.schaefer@...ibm.com>, "H. Peter Anvin" <hpa@...or.com>, Giuseppe Cavallaro <peppe.cavallaro@...com>, Alexandre Torgue <alexandre.torgue@...com>, Matt Porter <mporter@...nel.crashing.org>, Alexandre Bounine <alex.bou9@...il.com>, Peter Jones <pjones@...hat.com>, Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>, Cornelia Huck <cohuck@...hat.com>, Alex Williamson <alex.williamson@...hat.com>, kvm@...r.kernel.org, linux-fbdev@...r.kernel.org, netdev@...r.kernel.org, x86@...nel.org, linux-s390@...r.kernel.org, linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH 1/7] PCI: Add define for the number of standard PCI BARs Code that iterates over all standard PCI BARs typically uses PCI_STD_RESOURCE_END. However, it requires the "unusual" loop condition "i <= PCI_STD_RESOURCE_END" rather than something more standard like "i < PCI_STD_NUM_BARS". This patch adds the definition PCI_STD_NUM_BARS which is equivalent to "PCI_STD_RESOURCE_END + 1" and updates loop conditions to use it. Signed-off-by: Denis Efremov <efremov@...ux.com> --- drivers/pci/quirks.c | 2 +- include/linux/pci.h | 2 +- include/uapi/linux/pci_regs.h | 1 + 3 files changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 208aacf39329..02bdf3a0231e 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -475,7 +475,7 @@ static void quirk_extend_bar_to_page(struct pci_dev *dev) { int i; - for (i = 0; i <= PCI_STD_RESOURCE_END; i++) { + for (i = 0; i < PCI_STD_NUM_BARS; i++) { struct resource *r = &dev->resource[i]; if (r->flags & IORESOURCE_MEM && resource_size(r) < PAGE_SIZE) { diff --git a/include/linux/pci.h b/include/linux/pci.h index 9e700d9f9f28..7b9590d5dc2d 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -76,7 +76,7 @@ enum pci_mmap_state { enum { /* #0-5: standard PCI resources */ PCI_STD_RESOURCES, - PCI_STD_RESOURCE_END = 5, + PCI_STD_RESOURCE_END = PCI_STD_RESOURCES + PCI_STD_NUM_BARS - 1, /* #6: expansion ROM resource */ PCI_ROM_RESOURCE, diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h index f28e562d7ca8..68b571d491eb 100644 --- a/include/uapi/linux/pci_regs.h +++ b/include/uapi/linux/pci_regs.h @@ -34,6 +34,7 @@ * of which the first 64 bytes are standardized as follows: */ #define PCI_STD_HEADER_SIZEOF 64 +#define PCI_STD_NUM_BARS 6 /* Number of standard BARs */ #define PCI_VENDOR_ID 0x00 /* 16 bits */ #define PCI_DEVICE_ID 0x02 /* 16 bits */ #define PCI_COMMAND 0x04 /* 16 bits */ -- 2.21.0
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