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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;
}
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