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Fix tegra nouveau module load, PowerPC Little Endian ToC fix

This commit is contained in:
Peter Robinson 2016-02-25 10:23:41 +00:00
parent 1f3ef36b87
commit 3ce62e18dd
3 changed files with 124 additions and 106 deletions
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103
0001-Revert-powerpc-Simplify-module-TOC-handling.patch
View File

@ -1,103 +0,0 @@
From b66e7caab9e6634dadce2aced6e174c095e1ca0e Mon Sep 17 00:00:00 2001
From: Peter Robinson <pbrobinson@gmail.com>
Date: Tue, 9 Feb 2016 15:00:02 +0000
Subject: [PATCH] Revert "powerpc: Simplify module TOC handling"
This reverts commit c153693d7eb9eeb28478aa2deaaf0b4e7b5ff5e9.
---
arch/powerpc/kernel/misc_64.S | 28 ++++++++++++++++++++++++++++
arch/powerpc/kernel/module_64.c | 12 +++---------
scripts/mod/modpost.c | 3 +--
3 files changed, 32 insertions(+), 11 deletions(-)
diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S
index f28754c..db475d4 100644
--- a/arch/powerpc/kernel/misc_64.S
+++ b/arch/powerpc/kernel/misc_64.S
@@ -701,3 +701,31 @@ _GLOBAL(kexec_sequence)
li r5,0
blr /* image->start(physid, image->start, 0); */
#endif /* CONFIG_KEXEC */
+
+#ifdef CONFIG_MODULES
+#if defined(_CALL_ELF) && _CALL_ELF == 2
+
+#ifdef CONFIG_MODVERSIONS
+.weak __crc_TOC.
+.section "___kcrctab+TOC.","a"
+.globl __kcrctab_TOC.
+__kcrctab_TOC.:
+ .llong __crc_TOC.
+#endif
+
+/*
+ * Export a fake .TOC. since both modpost and depmod will complain otherwise.
+ * Both modpost and depmod strip the leading . so we do the same here.
+ */
+.section "__ksymtab_strings","a"
+__kstrtab_TOC.:
+ .asciz "TOC."
+
+.section "___ksymtab+TOC.","a"
+/* This symbol name is important: it's used by modpost to find exported syms */
+.globl __ksymtab_TOC.
+__ksymtab_TOC.:
+ .llong 0 /* .value */
+ .llong __kstrtab_TOC.
+#endif /* ELFv2 */
+#endif /* MODULES */
diff --git a/arch/powerpc/kernel/module_64.c b/arch/powerpc/kernel/module_64.c
index ac64ffd..59663af 100644
--- a/arch/powerpc/kernel/module_64.c
+++ b/arch/powerpc/kernel/module_64.c
@@ -326,10 +326,7 @@ static void dedotify_versions(struct modversion_info *vers,
}
}
-/*
- * Undefined symbols which refer to .funcname, hack to funcname. Make .TOC.
- * seem to be defined (value set later).
- */
+/* Undefined symbols which refer to .funcname, hack to funcname (or .TOC.) */
static void dedotify(Elf64_Sym *syms, unsigned int numsyms, char *strtab)
{
unsigned int i;
@@ -337,11 +334,8 @@ static void dedotify(Elf64_Sym *syms, unsigned int numsyms, char *strtab)
for (i = 1; i < numsyms; i++) {
if (syms[i].st_shndx == SHN_UNDEF) {
char *name = strtab + syms[i].st_name;
- if (name[0] == '.') {
- if (strcmp(name+1, "TOC.") == 0)
- syms[i].st_shndx = SHN_ABS;
+ if (name[0] == '.')
memmove(name, name+1, strlen(name));
- }
}
}
}
@@ -357,7 +351,7 @@ static Elf64_Sym *find_dot_toc(Elf64_Shdr *sechdrs,
numsyms = sechdrs[symindex].sh_size / sizeof(Elf64_Sym);
for (i = 1; i < numsyms; i++) {
- if (syms[i].st_shndx == SHN_ABS
+ if (syms[i].st_shndx == SHN_UNDEF
&& strcmp(strtab + syms[i].st_name, "TOC.") == 0)
return &syms[i];
}
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 48958d3..e080746 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -594,8 +594,7 @@ static int ignore_undef_symbol(struct elf_info *info, const char *symname)
if (strncmp(symname, "_restgpr0_", sizeof("_restgpr0_") - 1) == 0 ||
strncmp(symname, "_savegpr0_", sizeof("_savegpr0_") - 1) == 0 ||
strncmp(symname, "_restvr_", sizeof("_restvr_") - 1) == 0 ||
- strncmp(symname, "_savevr_", sizeof("_savevr_") - 1) == 0 ||
- strcmp(symname, ".TOC.") == 0)
+ strncmp(symname, "_savevr_", sizeof("_savevr_") - 1) == 0)
return 1;
/* Do not ignore this symbol */
return 0;
--
2.5.0

116
drm-nouveau-platform-Fix-deferred-probe.patch Normal file
View File

@ -0,0 +1,116 @@
From patchwork Wed Feb 24 17:34:43 2016
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Subject: drm/nouveau: platform: Fix deferred probe
From: Thierry Reding <thierry.reding@gmail.com>
X-Patchwork-Id: 587554
Message-Id: <1456335283-22097-1-git-send-email-thierry.reding@gmail.com>
To: Ben Skeggs <bskeggs@redhat.com>
Cc: Alexandre Courbot <gnurou@gmail.com>, Nicolas Chauvet <kwizart@gmail.com>,
dri-devel@lists.freedesktop.org, linux-tegra@vger.kernel.org
Date: Wed, 24 Feb 2016 18:34:43 +0100
From: Thierry Reding <treding@nvidia.com>
The error cleanup paths aren't quite correct and will crash upon
deferred probe.
Cc: stable@vger.kernel.org # v4.3+
Signed-off-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Ben Skeggs <bskeggs@redhat.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
---
drivers/gpu/drm/nouveau/nouveau_platform.c | 2 +-
drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c | 40 ++++++++++++++++------
2 files changed, 30 insertions(+), 12 deletions(-)
diff --git a/drivers/gpu/drm/nouveau/nouveau_platform.c b/drivers/gpu/drm/nouveau/nouveau_platform.c
index 8a70cec59bcd..2dfe58af12e4 100644
--- a/drivers/gpu/drm/nouveau/nouveau_platform.c
+++ b/drivers/gpu/drm/nouveau/nouveau_platform.c
@@ -24,7 +24,7 @@
static int nouveau_platform_probe(struct platform_device *pdev)
{
const struct nvkm_device_tegra_func *func;
- struct nvkm_device *device;
+ struct nvkm_device *device = NULL;
struct drm_device *drm;
int ret;
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c b/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c
index 7f8a42721eb2..e7e581d6a8ff 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c
@@ -252,32 +252,40 @@ nvkm_device_tegra_new(const struct nvkm_device_tegra_func *func,
if (!(tdev = kzalloc(sizeof(*tdev), GFP_KERNEL)))
return -ENOMEM;
- *pdevice = &tdev->device;
+
tdev->func = func;
tdev->pdev = pdev;
tdev->irq = -1;
tdev->vdd = devm_regulator_get(&pdev->dev, "vdd");
- if (IS_ERR(tdev->vdd))
- return PTR_ERR(tdev->vdd);
+ if (IS_ERR(tdev->vdd)) {
+ ret = PTR_ERR(tdev->vdd);
+ goto free;
+ }
tdev->rst = devm_reset_control_get(&pdev->dev, "gpu");
- if (IS_ERR(tdev->rst))
- return PTR_ERR(tdev->rst);
+ if (IS_ERR(tdev->rst)) {
+ ret = PTR_ERR(tdev->rst);
+ goto free;
+ }
tdev->clk = devm_clk_get(&pdev->dev, "gpu");
- if (IS_ERR(tdev->clk))
- return PTR_ERR(tdev->clk);
+ if (IS_ERR(tdev->clk)) {
+ ret = PTR_ERR(tdev->clk);
+ goto free;
+ }
tdev->clk_pwr = devm_clk_get(&pdev->dev, "pwr");
- if (IS_ERR(tdev->clk_pwr))
- return PTR_ERR(tdev->clk_pwr);
+ if (IS_ERR(tdev->clk_pwr)) {
+ ret = PTR_ERR(tdev->clk_pwr);
+ goto free;
+ }
nvkm_device_tegra_probe_iommu(tdev);
ret = nvkm_device_tegra_power_up(tdev);
if (ret)
- return ret;
+ goto remove;
tdev->gpu_speedo = tegra_sku_info.gpu_speedo_value;
ret = nvkm_device_ctor(&nvkm_device_tegra_func, NULL, &pdev->dev,
@@ -285,9 +293,19 @@ nvkm_device_tegra_new(const struct nvkm_device_tegra_func *func,
cfg, dbg, detect, mmio, subdev_mask,
&tdev->device);
if (ret)
- return ret;
+ goto powerdown;
+
+ *pdevice = &tdev->device;
return 0;
+
+powerdown:
+ nvkm_device_tegra_power_down(tdev);
+remove:
+ nvkm_device_tegra_remove_iommu(tdev);
+free:
+ kfree(tdev);
+ return ret;
}
#else
int

11
kernel.spec
View File

@ -40,7 +40,7 @@ Summary: The Linux kernel
# For non-released -rc kernels, this will be appended after the rcX and
# gitX tags, so a 3 here would become part of release "0.rcX.gitX.3"
#
%global baserelease 1
%global baserelease 2
%global fedora_build %{baserelease}
# base_sublevel is the kernel version we're starting with and patching
@ -503,8 +503,11 @@ Patch454: arm64-avoid-needing-console-to-enable-serial-console.patch
Patch456: arm64-acpi-drop-expert-patch.patch
# http://patchwork.ozlabs.org/patch/587554/
Patch457: ARM-tegra-usb-no-reset.patch
Patch458: drm-nouveau-platform-Fix-deferred-probe.patch
Patch463: arm-i.MX6-Utilite-device-dtb.patch
Patch466: input-kill-stupid-messages.patch
@ -583,8 +586,6 @@ Patch502: firmware-Drop-WARN-from-usermodehelper_read_trylock-.patch
Patch508: kexec-uefi-copy-secure_boot-flag-in-boot-params.patch
# Patch510: 0001-Revert-powerpc-Simplify-module-TOC-handling.patch
#rhbz 1286293
Patch571: ideapad-laptop-Add-Lenovo-ideapad-Y700-17ISK-to-no_h.patch
@ -2123,6 +2124,10 @@ fi
#
#
%changelog
* Thu Feb 25 2016 Peter Robinson <pbrobinson@fedoraproject.org> 4.5.0-0.rc5.git0.2
- Fix tegra nouveau module load (thank kwizart for reference)
- PowerPC Little Endian ToC fix
* Sun Feb 21 2016 Justin M. Forbes <jforbes@fedoraproject.org> - 4.5.0-0.rc5.git0.1
- Disable debugging options.
- Linux v4.5-rc5