Fix I/O space setup, so that on non-PCI systems using inb()/outb()
won't crash the system. Some drivers may try to probe I/O space and for
that purpose we can just allocate some normal memory. Drivers trying to
reserve a region will fail early as we set the size to 0.
Tested with EdgeRouter Lite by enabling CONFIG_SERIO_I8042 that caused
the originally reported crash.
Reported-by: Faidon Liambotis <paravoid@xxxxxxxxxx>
Signed-off-by: Aaro Koskinen <aaro.koskinen@xxxxxx>
---
arch/mips/pci/pci-octeon.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/arch/mips/pci/pci-octeon.c b/arch/mips/pci/pci-octeon.c
index 95c2ea8..1bfdcc8c 100644
--- a/arch/mips/pci/pci-octeon.c
+++ b/arch/mips/pci/pci-octeon.c
@@ -8,6 +8,7 @@
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/pci.h>
+#include <linux/vmalloc.h>
#include <linux/interrupt.h>
#include <linux/time.h>
#include <linux/delay.h>
@@ -587,13 +588,16 @@ static int __init octeon_pci_setup(void)
octeon_dma_bar_type = OCTEON_DMA_BAR_TYPE_BIG;
/* PCI I/O and PCI MEM values */
- set_io_port_base(OCTEON_PCI_IOSPACE_BASE);
- ioport_resource.start = 0;
- ioport_resource.end = OCTEON_PCI_IOSPACE_SIZE - 1;
if (!octeon_is_pci_host()) {
pr_notice("Not in host mode, PCI Controller not initialized\n");
+ set_io_port_base((unsigned long)vzalloc(IO_SPACE_LIMIT));
+ ioport_resource.start = MAX_RESOURCE;
+ ioport_resource.end = 0;
return 0;
}
+ set_io_port_base(OCTEON_PCI_IOSPACE_BASE);
+ ioport_resource.start = 0;
+ ioport_resource.end = OCTEON_PCI_IOSPACE_SIZE - 1;
pr_notice("%s Octeon big bar support\n",
(octeon_dma_bar_type ==
--
1.8.3.2
