arc770: enable unaligned access handling simulation in software

[openwrt.git] / target / linux / generic / patches-4.4 / 333-arc-enable-unaligned-access-in-kernel-mode.patch

diff --git a/target/linux/generic/patches-4.4/333-arc-enable-unaligned-access-in-kernel-mode.patch b/target/linux/generic/patches-4.4/333-arc-enable-unaligned-access-in-kernel-mode.patch
new file mode 100644 (file)
index 0000000..76a9ce8
--- /dev/null
+++ b/target/linux/generic/patches-4.4/333-arc-enable-unaligned-access-in-kernel-mode.patch
@@ -0,0 +1,31 @@
+From af737b55fc7c61f17da9ae89fba536e0a9338e98 Mon Sep 17 00:00:00 2001
+From: Alexey Brodkin <abrodkin@synopsys.com>
+Date: Mon, 14 Mar 2016 17:26:34 +0300
+Subject: [PATCH] arc: enable unaligned access in kernel mode
+
+This enables misaligned access handling even in kernel mode.
+Some wireless drivers (ath9k-htc and mt7601u) use misaligned accesses
+here and there and to cope with that without fixing stuff in the drivers
+we're just gracefully handling it on ARC.
+
+Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
+---
+ arch/arc/kernel/unaligned.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/arch/arc/kernel/unaligned.c b/arch/arc/kernel/unaligned.c
+index abd961f..0b0cc97 100644
+--- a/arch/arc/kernel/unaligned.c
++++ b/arch/arc/kernel/unaligned.c
+@@ -206,7 +206,7 @@ int misaligned_fixup(unsigned long address, struct pt_regs *regs,
+       char buf[TASK_COMM_LEN];
+ 
+       /* handle user mode only and only if enabled by sysadmin */
+-      if (!user_mode(regs) || !unaligned_enabled)
++      if (!unaligned_enabled)
+               return 1;
+ 
+       if (no_unaligned_warning) {
+-- 
+2.5.0
+