vgaarb: Fix VGA arbiter to accept PCI domains other than 0
Update the VGA Arbiter to accept PCI Domains other than 0. Signed-off-by: Mike Travis <travis@sgi.com> LKML-Reference: <201002022238.o12McFe8018730@imap1.linux-foundation.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Robin Holt <holt@sgi.com> Cc: Jack Steiner <steiner@sgi.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Cc: David Airlie <airlied@linux.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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@ -954,6 +954,7 @@ static ssize_t vga_arb_write(struct file *file, const char __user * buf,
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}
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} else if (strncmp(curr_pos, "target ", 7) == 0) {
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struct pci_bus *pbus;
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unsigned int domain, bus, devfn;
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struct vga_device *vgadev;
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@ -969,18 +970,31 @@ static ssize_t vga_arb_write(struct file *file, const char __user * buf,
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ret_val = -EPROTO;
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goto done;
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}
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pr_devel("vgaarb: %s ==> %x:%x:%x.%x\n", curr_pos,
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domain, bus, PCI_SLOT(devfn), PCI_FUNC(devfn));
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pdev = pci_get_bus_and_slot(bus, devfn);
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pbus = pci_find_bus(domain, bus);
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pr_devel("vgaarb: pbus %p\n", pbus);
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if (pbus == NULL) {
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pr_err("vgaarb: invalid PCI domain and/or bus address %x:%x\n",
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domain, bus);
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ret_val = -ENODEV;
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goto done;
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}
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pdev = pci_get_slot(pbus, devfn);
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pr_devel("vgaarb: pdev %p\n", pdev);
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if (!pdev) {
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pr_info("vgaarb: invalid PCI address!\n");
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pr_err("vgaarb: invalid PCI address %x:%x\n",
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bus, devfn);
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ret_val = -ENODEV;
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goto done;
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}
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}
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vgadev = vgadev_find(pdev);
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pr_devel("vgaarb: vgadev %p\n", vgadev);
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if (vgadev == NULL) {
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pr_info("vgaarb: this pci device is not a vga device\n");
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pr_err("vgaarb: this pci device is not a vga device\n");
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pci_dev_put(pdev);
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ret_val = -ENODEV;
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goto done;
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@ -998,7 +1012,8 @@ static ssize_t vga_arb_write(struct file *file, const char __user * buf,
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}
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}
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if (i == MAX_USER_CARDS) {
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pr_err("vgaarb: maximum user cards number reached!\n");
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pr_err("vgaarb: maximum user cards (%d) number reached!\n",
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MAX_USER_CARDS);
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pci_dev_put(pdev);
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/* XXX: which value to return? */
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ret_val = -ENOMEM;
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