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| author | Mike Travis <travis@sgi.com> | 2010-02-02 23:38:15 +0100 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2010-02-05 23:05:41 +0100 |
| commit | 773a38dbdad03474c5ee235f7d9bf9f51c9e3c2b (patch) | |
| tree | 0ae8953a3ad092f9294f51de0f6b3f2c48d1a0ef /drivers/gpu/vga/vgaarb.c | |
| parent | x86, uv: Update UV arch to target Legacy VGA I/O correctly. (diff) | |
| download | linux-773a38dbdad03474c5ee235f7d9bf9f51c9e3c2b.tar.xz linux-773a38dbdad03474c5ee235f7d9bf9f51c9e3c2b.zip | |
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>
Diffstat (limited to 'drivers/gpu/vga/vgaarb.c')
| -rw-r--r-- | drivers/gpu/vga/vgaarb.c | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/drivers/gpu/vga/vgaarb.c b/drivers/gpu/vga/vgaarb.c index 1ac0c93603c9..ba7fa9ee54dc 100644 --- a/drivers/gpu/vga/vgaarb.c +++ b/drivers/gpu/vga/vgaarb.c @@ -954,6 +954,7 @@ static ssize_t vga_arb_write(struct file *file, const char __user * buf, } } else if (strncmp(curr_pos, "target ", 7) == 0) { + struct pci_bus *pbus; unsigned int domain, bus, devfn; struct vga_device *vgadev; @@ -969,18 +970,31 @@ static ssize_t vga_arb_write(struct file *file, const char __user * buf, ret_val = -EPROTO; goto done; } - - pdev = pci_get_bus_and_slot(bus, devfn); + pr_devel("vgaarb: %s ==> %x:%x:%x.%x\n", curr_pos, + domain, bus, PCI_SLOT(devfn), PCI_FUNC(devfn)); + + pbus = pci_find_bus(domain, bus); + pr_devel("vgaarb: pbus %p\n", pbus); + if (pbus == NULL) { + pr_err("vgaarb: invalid PCI domain and/or bus address %x:%x\n", + domain, bus); + ret_val = -ENODEV; + goto done; + } + pdev = pci_get_slot(pbus, devfn); + pr_devel("vgaarb: pdev %p\n", pdev); if (!pdev) { - pr_info("vgaarb: invalid PCI address!\n"); + pr_err("vgaarb: invalid PCI address %x:%x\n", + bus, devfn); ret_val = -ENODEV; goto done; } } vgadev = vgadev_find(pdev); + pr_devel("vgaarb: vgadev %p\n", vgadev); if (vgadev == NULL) { - pr_info("vgaarb: this pci device is not a vga device\n"); + pr_err("vgaarb: this pci device is not a vga device\n"); pci_dev_put(pdev); ret_val = -ENODEV; goto done; @@ -998,7 +1012,8 @@ static ssize_t vga_arb_write(struct file *file, const char __user * buf, } } if (i == MAX_USER_CARDS) { - pr_err("vgaarb: maximum user cards number reached!\n"); + pr_err("vgaarb: maximum user cards (%d) number reached!\n", + MAX_USER_CARDS); pci_dev_put(pdev); /* XXX: which value to return? */ ret_val = -ENOMEM; |