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i2o: Fix I/O space alignment requirement 

When i2o_iop_systab_set() allocates I/O port space, it specifies 1Mb
alignment required.  This seems unlikely, since most platforms have only
64Kb of I/O space total.  I think 4Kb is a more reasonable choice, since
that's the minimum alignment of a PCI-PCI bridge I/O window.

My guess is that this is a copy/paste error from the memory allocation
code, which specifies 1Mb alignment (which is the minimum alignment of a
PCI-PCI bridge memory window).

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Bjorn Helgaas 2014-02-26 11:25:57 -07:00
parent 7ed37fc328
commit 5c513bd580
1 changed files with 1 additions and 1 deletions
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2
drivers/message/i2o/iop.c
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@ -700,7 +700,7 @@ static int i2o_iop_systab_set(struct i2o_controller *c)
root = pci_find_parent_resource(c->pdev, res);
if (root == NULL)
osm_warn("%s: Can't find parent resource!\n", c->name);
if (root && allocate_resource(root, res, sb->desired_io_size, sb->desired_io_size, sb->desired_io_size, 1 << 20, /* Unspecified, so use 1Mb and play safe */
if (root && allocate_resource(root, res, sb->desired_io_size, sb->desired_io_size, sb->desired_io_size, 1 << 12, /* Unspecified, so use 4Kb and play safe */
NULL, NULL) >= 0) {
c->io_alloc = 1;
sb->current_io_size = resource_size(res);