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PCI: Handle case when no pci device can provide cache line size hint

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Prior to this patch, if pci_read_config_byte(dev, PCI_CACHE_LINE_SIZE, ...)
returns 0 for all dev, pci_cache_line_size ends up set to zero
(instead of pci_dfl_cache_line_size).

This patch ensures the pci_cache_line_size = pci_dfl_cache_line_size
setting in the above scenario.

This happens in case of a kvm-88 guest (where, consequently, the rtl8139
NIC failed to initialize).

Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Csaba Henk <csaba@gluster.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Csaba Henk 2009-12-15 17:55:25 +05:30 committed by Jesse Barnes
parent dc1a94ae17
commit 2820f333e3
1 changed files with 1 additions and 1 deletions
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2
drivers/pci/quirks.c
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@ -2629,7 +2629,7 @@ static int __init pci_apply_final_quirks(void)
if (!pci_cache_line_size) {
printk(KERN_DEBUG "PCI: CLS %u bytes, default %u\n",
cls << 2, pci_dfl_cache_line_size << 2);
pci_cache_line_size = cls;
pci_cache_line_size = cls ? cls : pci_dfl_cache_line_size;
}
return 0;