diff options
Diffstat (limited to 'drivers/pci/pci.c')
| -rw-r--r-- | drivers/pci/pci.c | 40 |
1 files changed, 19 insertions, 21 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 1d8bb090a40b..7eb6eb384e36 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -5065,30 +5065,28 @@ static void pci_request_resource_alignment(struct pci_dev *dev, int bar, } size = resource_size(r); - if (size < align) { + if (size >= align) + return; - /* - * Increase the size of the resource. BARs are aligned on - * their size, so when we reallocate space for this - * resource, we'll allocate it with the larger alignment. - * It also prevents assignment of any other BARs inside the - * size. If we're requesting page alignment, this means no - * other BARs will share the page. - * - * This makes the resource larger than the hardware BAR, - * which may break drivers that compute things based on the - * resource size, e.g., to find registers at a fixed offset - * before the end of the BAR. We hope users don't request - * alignment for such devices. - */ - size = align; - dev_info(&dev->dev, "BAR%d %pR: requesting alignment to %#llx\n", - bar, r, (unsigned long long)align); + /* + * Increase the size of the resource. BARs are aligned on their + * size, so when we reallocate space for this resource, we'll + * allocate it with the larger alignment. It also prevents + * assignment of any other BARs inside the size. If we're + * requesting page alignment, this means no other BARs will share + * the page. + * + * This makes the resource larger than the hardware BAR, which may + * break drivers that compute things based on the resource size, + * e.g., to find registers at a fixed offset before the end of the + * BAR. We hope users don't request alignment for such devices. + */ + dev_info(&dev->dev, "BAR%d %pR: requesting alignment to %#llx\n", + bar, r, (unsigned long long)align); - } - r->flags |= IORESOURCE_UNSET; - r->end = size - 1; r->start = 0; + r->end = align - 1; + r->flags |= IORESOURCE_UNSET; } /* |