If there is no valid cache info detected (may happen in virtual machine)
for pci_dfl_cache_line_size, kernel shouldn't panic. Because in the PCI
core it will be evaluated to (L1_CACHE_BYTES >> 2).
Cc: <stable@vger.kernel.org>
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
---
arch/loongarch/pci/pci.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/arch/loongarch/pci/pci.c b/arch/loongarch/pci/pci.c
index 5bc9627a6cf9..d9fc5d520b37 100644
--- a/arch/loongarch/pci/pci.c
+++ b/arch/loongarch/pci/pci.c
@@ -50,11 +50,11 @@ static int __init pcibios_init(void)
*/
lsize = cpu_last_level_cache_line_size();
- BUG_ON(!lsize);
+ if (lsize) {
+ pci_dfl_cache_line_size = lsize >> 2;
- pci_dfl_cache_line_size = lsize >> 2;
-
- pr_debug("PCI: pci_cache_line_size set to %d bytes\n", lsize);
+ pr_debug("PCI: pci_cache_line_size set to %d bytes\n", lsize);
+ }
return 0;
}
--
2.47.3