mirror of https://github.com/hak5/openwrt-owl.git
37 lines
1.2 KiB
Diff
37 lines
1.2 KiB
Diff
|
From 8590081d5328fe59d4f72aaadafb47fb91d8dc7c Mon Sep 17 00:00:00 2001
|
||
|
|
From: Tim Harvey <tharvey@gateworks.com>
|
||
|
|
Date: Thu, 17 Oct 2013 15:52:16 -0700
|
||
|
|
Subject: [PATCH] PCI: imx6: fix imprecise abort handler
|
||
|
|
|
||
|
|
An imprecise abort is triggered when a port behind a switch is accessed
|
||
|
|
and no device is present. At enumeration, imprecise aborts are not enabled
|
||
|
|
thus this ends up getting deferred until the kernel has completed init. At
|
||
|
|
that point we must not adjust PC - the handler must do nothing, but a handler
|
||
|
|
must exist.
|
||
|
|
|
||
|
|
This fixes random crashes that occur right after freeing init.
|
||
|
|
This is against linux-pci/host-imx6.
|
||
|
|
|
||
|
|
Acked-by: Marek Vasut <marex@denx.de>
|
||
|
|
Tested-by: Marek Vasut <marex@denx.de>
|
||
|
|
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
|
||
|
|
---
|
||
|
|
drivers/pci/host/pci-imx6.c | 6 ------
|
||
|
|
1 file changed, 6 deletions(-)
|
||
|
|
|
||
|
|
--- a/drivers/pci/host/pci-imx6.c
|
||
|
|
+++ b/drivers/pci/host/pci-imx6.c
|
||
|
|
@@ -200,12 +200,6 @@ static int pcie_phy_write(void __iomem *
|
||
|
|
static int imx6q_pcie_abort_handler(unsigned long addr,
|
||
|
|
unsigned int fsr, struct pt_regs *regs)
|
||
|
|
{
|
||
|
|
- /*
|
||
|
|
- * If it was an imprecise abort, then we need to correct the
|
||
|
|
- * return address to be _after_ the instruction.
|
||
|
|
- */
|
||
|
|
- if (fsr & (1 << 10))
|
||
|
|
- regs->ARM_pc += 4;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|