Commit 2820f333 authored Dec 15, 2009 by Csaba Henk Committed by Jesse Barnes Dec 16, 2009

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



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>

parent dc1a94ae

drivers/pci/quirks.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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;