[mips*] Fix FP emulation.

svn path=/dists/trunk/linux/; revision=21680

debian/changelog

@@ -3,6 +3,7 @@ linux (3.16~rc6-1~exp2) UNRELEASED; urgency=medium
   [ Aurelien Jarno ]
   * [x86] vfio: Enable VFIO_PCI_VGA.
   * udeb: rename crc32c.ko into crc32c_generic.ko in crc-modules.
+  * [mips*] Fix FP emulation.
 
   [ Bastian Blank ]
   * [x86] Enable Xen PVH support.

debian/patches/bugfix/mips/MIPS-math-emu-cp1emu-Fix-typo-when-returning-to-regi.patch

@@ -0,0 +1,42 @@
+From: Rob Kendrick <rob.kendrick@codethink.co.uk>
+Date: Wed, 23 Jul 2014 13:41:58 +0100
+Subject: MIPS: math-emu: cp1emu: Fix typo when returning to register file
+Origin: https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/?id=8476cba1198d0869467d1d7bf0d5f8808a724986
+
+The commit 08a07904e182 (MIPS: math-emu: Remove most ifdefery) in
+v3.16-rc1 switched from build time to runtime detection for the CPU ISA
+level.
+
+However, along the way, a typo was introduced in the code path
+to return the value to the register file. Previously, the
+MIPSInst_FD macro was used but the above commit switched to
+MIPSInst_RT leading to regressions.
+
+Link: http://www.linux-mips.org/archives/linux-mips/2014-07/msg00484.html
+Reported-by: Rob Kendrick <rob.kendrick@codethink.co.uk>
+Reviewed-by: Paul Burton <paul.burton@imgtec.com>
+Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
+Signed-off-by: Rob Kendrick <rob.kendrick@codethink.co.uk>
+Tested-by: Aurelien Jarno <aurelien@aurel32.net>
+Patchwork: http://patchwork.linux-mips.org/patch/7448/
+Signed-off-by: James Hogan <james.hogan@imgtec.com>
+---
+ arch/mips/math-emu/cp1emu.c |    2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/arch/mips/math-emu/cp1emu.c b/arch/mips/math-emu/cp1emu.c
+index 736c17a..bf0fc6b 100644
+--- a/arch/mips/math-emu/cp1emu.c
++++ b/arch/mips/math-emu/cp1emu.c
+@@ -1827,7 +1827,7 @@ dcopuop:
+ 	case -1:
+ 
+ 		if (cpu_has_mips_4_5_r)
+-			cbit = fpucondbit[MIPSInst_RT(ir) >> 2];
++			cbit = fpucondbit[MIPSInst_FD(ir) >> 2];
+ 		else
+ 			cbit = FPU_CSR_COND;
+ 		if (rv.w)
+-- 
+1.7.10.4
+

debian/patches/series

@@ -54,6 +54,7 @@ bugfix/mips/disable-advansys.patch
 bugfix/arm/ixp4xx_iobe.patch
 bugfix/m68k/ethernat-kconfig.patch
 bugfix/mips/MIPS-ZBOOT-add-missing-linux-string.h-include.patch
+bugfix/mips/MIPS-math-emu-cp1emu-Fix-typo-when-returning-to-regi.patch
 
 # Miscellaneous bug fixes
 bugfix/all/misc-bmp085-Enable-building-as-a-module.patch