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Subject[PATCH 1/1] 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).

Signed-off-by: Csaba Henk <csaba@gluster.com>
---
drivers/pci/quirks.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 7cfa7c3..f70f4e2 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -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;
--
1.6.5.6


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