ARM: mvebu: remove the workaround imprecise abort fault handler

This is not needed anymore. Handling a potentially pending imprecise
external abort left behind by the bootloader is now done in a slightly
safer way inside the common ARM startup code.

[gregory.clement@free-electrons.com: Beside the Armada 375 Z1 which
initially required this, is no more supported]

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>

diff --git a/arch/arm/mach-mvebu/board-v7.c b/arch/arm/mach-mvebu/board-v7.c
index 9f739f3cad4c7e584391c0e8f79ec27376d5fa4c..1648edd515a2c2c5f313b0c9d3d68d6bebad545c 100644 (file)
--- a/arch/arm/mach-mvebu/board-v7.c
+++ b/arch/arm/mach-mvebu/board-v7.c
@@ -22,7 +22,6 @@
 #include <linux/dma-mapping.h>
 #include <linux/memblock.h>
 #include <linux/mbus.h>
-#include <linux/signal.h>
 #include <linux/slab.h>
 #include <linux/irqchip.h>
 #include <asm/hardware/cache-l2x0.h>
@@ -105,27 +104,6 @@ static void __init mvebu_memblock_reserve(void)
 static void __init mvebu_memblock_reserve(void) {}
 #endif
 
-/*
- * Early versions of Armada 375 SoC have a bug where the BootROM
- * leaves an external data abort pending. The kernel is hit by this
- * data abort as soon as it enters userspace, because it unmasks the
- * data aborts at this moment. We register a custom abort handler
- * below to ignore the first data abort to work around this
- * problem.
- */
-static int armada_375_external_abort_wa(unsigned long addr, unsigned int fsr,
-                                       struct pt_regs *regs)
-{
-       static int ignore_first;
-
-       if (!ignore_first && fsr == 0x1406) {
-               ignore_first = 1;
-               return 0;
-       }
-
-       return 1;
-}
-
 static void __init mvebu_init_irq(void)
 {
        irqchip_init();
@@ -134,17 +112,6 @@ static void __init mvebu_init_irq(void)
        BUG_ON(mvebu_mbus_dt_init(coherency_available()));
 }
 
-static void __init external_abort_quirk(void)
-{
-       u32 dev, rev;
-
-       if (mvebu_get_soc_id(&dev, &rev) == 0 && rev > ARMADA_375_Z1_REV)
-               return;
-
-       hook_fault_code(16 + 6, armada_375_external_abort_wa, SIGBUS, 0,
-                       "imprecise external abort");
-}
-
 static void __init i2c_quirk(void)
 {
        struct device_node *np;
@@ -177,8 +144,6 @@ static void __init mvebu_dt_init(void)
 {
        if (of_machine_is_compatible("marvell,armadaxp"))
                i2c_quirk();
-       if (of_machine_is_compatible("marvell,a375-db"))
-               external_abort_quirk();
 
        of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
 }