linux-libre-knock-3.19.3_gnu-1.1: fix system boot hang with libreboot -> https://bugzilla.kernel.org/show_bug.cgi?id=93171

2 files changed, 73 insertions, 1 deletions

diff --git a/kernels/linux-libre-knock/0001-drm-i915-Dont-enable-CS_PARSER_ERROR-interrupts-at-all.patch b/kernels/linux-libre-knock/0001-drm-i915-Dont-enable-CS_PARSER_ERROR-interrupts-at-all.patch
new file mode 100644
index 000000000..4e801b3cc
--- /dev/null
+++ b/kernels/linux-libre-knock/0001-drm-i915-Dont-enable-CS_PARSER_ERROR-interrupts-at-all.patch
@@ -0,0 +1,66 @@
+From b27b2ff4bd6f0327ee550baa0397ccf0a559821f Mon Sep 17 00:00:00 2001
+From: Daniel Vetter <daniel.vetter@ffwll.ch>
+Date: Wed, 1 Apr 2015 13:40:48 +0200
+Subject: [PATCH] drm/i915: Dont enable CS_PARSER_ERROR interrupts at all
+
+We stopped handling them in
+
+commit aaecdf611a05cac26a94713bad25297e60225c29
+Author: Daniel Vetter <daniel.vetter@ffwll.ch>
+Date:   Tue Nov 4 15:52:22 2014 +0100
+
+    drm/i915: Stop gathering error states for CS error interrupts
+
+but just clearing is apparently not enough: A sufficiently dead gpu
+left behind by firmware (*cough* coreboot *cough*) can keep the gpu in
+an endless loop of such interrupts, eventually leading to the nmi
+firing. And definitely to what looks like a machine hang.
+
+Since we don't even enable these interrupts on gen5+ let's do the same
+on earlier platforms.
+
+Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=93171
+Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
+---
+ drivers/gpu/drm/i915/i915_irq.c | 8 ++------
+ 1 file changed, 2 insertions(+), 6 deletions(-)
+
+diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
+index 14ecb4d13a1a..6d494432b19f 100644
+--- a/drivers/gpu/drm/i915/i915_irq.c
++++ b/drivers/gpu/drm/i915/i915_irq.c
+@@ -3598,14 +3598,12 @@ static int i8xx_irq_postinstall(struct drm_device *dev)
+ 		~(I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
+ 		  I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
+ 		  I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
+-		  I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
+-		  I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
++		  I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT);
+ 	I915_WRITE16(IMR, dev_priv->irq_mask);
+ 
+ 	I915_WRITE16(IER,
+ 		     I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
+ 		     I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
+-		     I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT |
+ 		     I915_USER_INTERRUPT);
+ 	POSTING_READ16(IER);
+ 
+@@ -3767,14 +3765,12 @@ static int i915_irq_postinstall(struct drm_device *dev)
+ 		  I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
+ 		  I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
+ 		  I915_DISPLAY_PLANE_A_FLIP_PENDING_INTERRUPT |
+-		  I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT |
+-		  I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT);
++		  I915_DISPLAY_PLANE_B_FLIP_PENDING_INTERRUPT);
+ 
+ 	enable_mask =
+ 		I915_ASLE_INTERRUPT |
+ 		I915_DISPLAY_PIPE_A_EVENT_INTERRUPT |
+ 		I915_DISPLAY_PIPE_B_EVENT_INTERRUPT |
+-		I915_RENDER_COMMAND_PARSER_ERROR_INTERRUPT |
+ 		I915_USER_INTERRUPT;
+ 
+ 	if (I915_HAS_HOTPLUG(dev)) {
+-- 
+2.1.4
+
diff --git a/kernels/linux-libre-knock/PKGBUILD b/kernels/linux-libre-knock/PKGBUILD
index b7cf87fa8..7b9929852 100644
--- a/kernels/linux-libre-knock/PKGBUILD
+++ b/kernels/linux-libre-knock/PKGBUILD
@@ -19,7 +19,7 @@ _replacesoldmodules=() # '%' gets replaced with _kernelname
 _srcname=linux-${_pkgbasever%-*}
 _archpkgver=${_pkgver%-*}
 pkgver=${_pkgver//-/_}
-pkgrel=1
+pkgrel=1.1
 arch=('i686' 'x86_64' 'mips64el')
 url="https://gnunet.org/knock"
 license=('GPL2')
@@ -37,6 +37,7 @@ source=("http://linux-libre.fsfla.org/pub/linux-libre/releases/${_pkgbasever}/li
         'linux.preset'
         'logo_linux_'{clut224.ppm,vga16.ppm,mono.pbm}
         'change-default-console-loglevel.patch'
+        '0001-drm-i915-Dont-enable-CS_PARSER_ERROR-interrupts-at-all.patch'
         # loongson-community patch: http://linux-libre.fsfla.org/pub/linux-libre/lemote/gnewsense/pool/debuginfo/
         '3.19-d230a5811d-loongson-community.patch')
 sha256sums=('2a60ec99ae498e7cdafac63ecca1c0ca07643eaa6c9a1a83f19e4daa3e75b9d9'
@@ -53,6 +54,7 @@ sha256sums=('2a60ec99ae498e7cdafac63ecca1c0ca07643eaa6c9a1a83f19e4daa3e75b9d9'
             '6de8a8319271809ffdb072b68d53d155eef12438e6d04ff06a5a4db82c34fa8a'
             '13bd7a8d9ed6b6bc971e4cd162262c5a20448a83796af39ce394d827b0e5de74'
             '1256b241cd477b265a3c2d64bdc19ffe3c9bbcee82ea3994c590c2c76e767d99'
+            '66cb2d859b253bc4e793baa3c0b95523d647a773b957dbc79b3eaacccf8692b5'
             '4d534c9368705b3f985817d84381a748dfaf81bd4193ce465163a753c8b7b93e')
 validpgpkeys=(
               '474402C8C582DAFBE389C427BCB7CF877E7D47A7' # Alexandre Oliva
@@ -92,6 +94,10 @@ prepare() {
   # (relevant patch sent upstream: https://lkml.org/lkml/2011/7/26/227)
   patch -p1 -i "${srcdir}/change-default-console-loglevel.patch"
 
+  # drm/i915: Stop gathering error states for CS error interrupts
+  # https://bugzilla.kernel.org/show_bug.cgi?id=93171
+  patch -p1 -i "${srcdir}/0001-drm-i915-Dont-enable-CS_PARSER_ERROR-interrupts-at-all.patch"
+
   # Adding loongson-community patch
   if [ "${CARCH}" == "mips64el" ]; then
     patch -p1 -i ${srcdir}/3.19-d230a5811d-loongson-community.patch