target/linux/bcm53xx/patches-4.4/047-0011-ARM-dts-BCM53573-Don-t-use-nonexistent-default-off-L.patch


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From 820a3e952b266d4355e89ed91c9b11945030321e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
Date: Wed, 8 Mar 2017 07:41:04 +0100
Subject: [PATCH] ARM: dts: BCM53573: Don't use nonexistent "default-off" LED
 trigger
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Such a trigger doesn't exist in Linux and is not needed as LED is being
turned off by default. This could cause errors in LEDs core code when
trying to set default trigger.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 arch/arm/boot/dts/bcm47189-tenda-ac9.dts | 4 ----
 1 file changed, 4 deletions(-)

--- a/arch/arm/boot/dts/bcm47189-tenda-ac9.dts
+++ b/arch/arm/boot/dts/bcm47189-tenda-ac9.dts
@@ -26,19 +26,16 @@
 		usb {
 			label = "bcm53xx:blue:usb";
 			gpios = <&chipcommon 1 GPIO_ACTIVE_HIGH>;
-			linux,default-trigger = "default-off";
 		};
 
 		wps {
 			label = "bcm53xx:blue:wps";
 			gpios = <&chipcommon 10 GPIO_ACTIVE_HIGH>;
-			linux,default-trigger = "default-off";
 		};
 
 		5ghz {
 			label = "bcm53xx:blue:5ghz";
 			gpios = <&chipcommon 11 GPIO_ACTIVE_HIGH>;
-			linux,default-trigger = "default-off";
 		};
 
 		system {
@@ -54,7 +51,6 @@
 		2ghz {
 			label = "bcm53xx:blue:2ghz";
 			gpios = <&pcie0_chipcommon 3 GPIO_ACTIVE_HIGH>;
-			linux,default-trigger = "default-off";
 		};
 	};
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -90,8 +90,13 @@ all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlin
 cflags-y			+= -G 0 -mno-abicalls -fno-pic -pipe -mno-branch-likely
 cflags-y			+= -msoft-float
 LDFLAGS_vmlinux			+= -G 0 -static -n -nostdlib --gc-sections
+ifdef CONFIG_64BIT
 KBUILD_AFLAGS_MODULE		+= -mlong-calls
 KBUILD_CFLAGS_MODULE		+= -mlong-calls
+else
+KBUILD_AFLAGS_MODULE		+= -mno-long-calls
+KBUILD_CFLAGS_MODULE		+= -mno-long-calls
+endif
 
 ifndef CONFIG_FUNCTION_TRACER
 KBUILD_CFLAGS_KERNEL		+= -ffunction-sections -fdata-sections
--- a/arch/mips/include/asm/module.h
+++ b/arch/mips/include/asm/module.h
@@ -11,6 +11,11 @@ struct mod_arch_specific {
 	const struct exception_table_entry *dbe_start;
 	const struct exception_table_entry *dbe_end;
 	struct mips_hi16 *r_mips_hi16_list;
+
+	void *phys_plt_tbl;
+	void *virt_plt_tbl;
+	unsigned int phys_plt_offset;
+	unsigned int virt_plt_offset;
 };
 
 typedef uint8_t Elf64_Byte;		/* Type for a 8-bit quantity.  */
--- a/arch/mips/kernel/module.c
+++ b/arch/mips/kernel/module.c
@@ -42,14 +42,219 @@ struct mips_hi16 {
 static LIST_HEAD(dbe_list);
 static DEFINE_SPINLOCK(dbe_lock);
 
-#ifdef MODULE_START
+/*
+ * Get the potential max trampolines size required of the init and
+ * non-init sections. Only used if we cannot find enough contiguous
+ * physically mapped memory to put the module into.
+ */
+static unsigned int
+get_plt_size(const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs,
+             const char *secstrings, unsigned int symindex, bool is_init)
+{
+	unsigned long ret = 0;
+	unsigned int i, j;
+	Elf_Sym *syms;
+
+	/* Everything marked ALLOC (this includes the exported symbols) */
+	for (i = 1; i < hdr->e_shnum; ++i) {
+		unsigned int info = sechdrs[i].sh_info;
+
+		if (sechdrs[i].sh_type != SHT_REL
+		    && sechdrs[i].sh_type != SHT_RELA)
+			continue;
+
+		/* Not a valid relocation section? */
+		if (info >= hdr->e_shnum)
+			continue;
+
+		/* Don't bother with non-allocated sections */
+		if (!(sechdrs[info].sh_flags & SHF_ALLOC))
+			continue;
+
+		/* If it's called *.init*, and we're not init, we're
+                   not interested */
+		if ((strstr(secstrings + sechdrs[i].sh_name, ".init") != 0)
+		    != is_init)
+			continue;
+
+		syms = (Elf_Sym *) sechdrs[symindex].sh_addr;
+		if (sechdrs[i].sh_type == SHT_REL) {
+			Elf_Mips_Rel *rel = (void *) sechdrs[i].sh_addr;
+			unsigned int size = sechdrs[i].sh_size / sizeof(*rel);
+
+			for (j = 0; j < size; ++j) {
+				Elf_Sym *sym;
+
+				if (ELF_MIPS_R_TYPE(rel[j]) != R_MIPS_26)
+					continue;
+
+				sym = syms + ELF_MIPS_R_SYM(rel[j]);
+				if (!is_init && sym->st_shndx != SHN_UNDEF)
+					continue;
+
+				ret += 4 * sizeof(int);
+			}
+		} else {
+			Elf_Mips_Rela *rela = (void *) sechdrs[i].sh_addr;
+			unsigned int size = sechdrs[i].sh_size / sizeof(*rela);
+
+			for (j = 0; j < size; ++j) {
+				Elf_Sym *sym;
+
+				if (ELF_MIPS_R_TYPE(rela[j]) != R_MIPS_26)
+					continue;
+
+				sym = syms + ELF_MIPS_R_SYM(rela[j]);
+				if (!is_init && sym->st_shndx != SHN_UNDEF)
+					continue;
+
+				ret += 4 * sizeof(int);
+			}
+		}
+	}
+
+	return ret;
+}
+
+#ifndef MODULE_START
+static void *alloc_phys(unsigned long size)
+{
+	unsigned order;
+	struct page *page;
+	struct page *p;
+
+	size = PAGE_ALIGN(size);
+	order = get_order(size);
+
+	page = alloc_pages(GFP_KERNEL | __GFP_NORETRY | __GFP_NOWARN |
+			__GFP_THISNODE, order);
+	if (!page)
+		return NULL;
+
+	split_page(page, order);
+
+	for (p = page + (size >> PAGE_SHIFT); p < page + (1 << order); ++p)
+		__free_page(p);
+
+	return page_address(page);
+}
+#endif
+
+static void free_phys(void *ptr, unsigned long size)
+{
+	struct page *page;
+	struct page *end;
+
+	page = virt_to_page(ptr);
+	end = page + (PAGE_ALIGN(size) >> PAGE_SHIFT);
+
+	for (; page < end; ++page)
+		__free_page(page);
+}
+
+
 void *module_alloc(unsigned long size)
 {
+#ifdef MODULE_START
 	return __vmalloc_node_range(size, 1, MODULE_START, MODULE_END,
 				GFP_KERNEL, PAGE_KERNEL, -1,
 				__builtin_return_address(0));
+#else
+	void *ptr;
+
+	if (size == 0)
+		return NULL;
+
+	ptr = alloc_phys(size);
+
+	/* If we failed to allocate physically contiguous memory,
+	 * fall back to regular vmalloc. The module loader code will
+	 * create jump tables to handle long jumps */
+	if (!ptr)
+		return vmalloc(size);
+
+	return ptr;
+#endif
 }
+
+static inline bool is_phys_addr(void *ptr)
+{
+#ifdef CONFIG_64BIT
+	return (KSEGX((unsigned long)ptr) == CKSEG0);
+#else
+	return (KSEGX(ptr) == KSEG0);
 #endif
+}
+
+/* Free memory returned from module_alloc */
+void module_free(struct module *mod, void *module_region)
+{
+	if (is_phys_addr(module_region)) {
+		if (mod->module_init == module_region)
+			free_phys(module_region, mod->init_size);
+		else if (mod->module_core == module_region)
+			free_phys(module_region, mod->core_size);
+		else
+			BUG();
+	} else {
+		vfree(module_region);
+	}
+}
+
+static void *__module_alloc(int size, bool phys)
+{
+	void *ptr;
+
+	if (phys)
+		ptr = kmalloc(size, GFP_KERNEL);
+	else
+		ptr = vmalloc(size);
+	return ptr;
+}
+
+static void __module_free(void *ptr)
+{
+	if (is_phys_addr(ptr))
+		kfree(ptr);
+	else
+		vfree(ptr);
+}
+
+int module_frob_arch_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs,
+			      char *secstrings, struct module *mod)
+{
+	unsigned int symindex = 0;
+	unsigned int core_size, init_size;
+	int i;
+
+	for (i = 1; i < hdr->e_shnum; i++)
+		if (sechdrs[i].sh_type == SHT_SYMTAB)
+			symindex = i;
+
+	core_size = get_plt_size(hdr, sechdrs, secstrings, symindex, false);
+	init_size = get_plt_size(hdr, sechdrs, secstrings, symindex, true);
+
+	mod->arch.phys_plt_offset = 0;
+	mod->arch.virt_plt_offset = 0;
+	mod->arch.phys_plt_tbl = NULL;
+	mod->arch.virt_plt_tbl = NULL;
+
+	if ((core_size + init_size) == 0)
+		return 0;
+
+	mod->arch.phys_plt_tbl = __module_alloc(core_size + init_size, 1);
+	if (!mod->arch.phys_plt_tbl)
+		return -ENOMEM;
+
+	mod->arch.virt_plt_tbl = __module_alloc(core_size + init_size, 0);
+	if (!mod->arch.virt_plt_tbl) {
+		__module_free(mod->arch.phys_plt_tbl);
+		mod->arch.phys_plt_tbl = NULL;
+		return -ENOMEM;
+	}
+
+	return 0;
+}
 
 int apply_r_mips_none(struct module *me, u32 *location, Elf_Addr v)
 {
@@ -63,8 +268,39 @@ static int apply_r_mips_32_rel(struct mo
 	return 0;
 }
 
+static Elf_Addr add_plt_entry_to(unsigned *plt_offset,
+				 void *start, Elf_Addr v)
+{
+	unsigned *tramp = start + *plt_offset;
+	*plt_offset += 4 * sizeof(int);
+
+	/* adjust carry for addiu */
+	if (v & 0x00008000)
+		v += 0x10000;
+
+	tramp[0] = 0x3c190000 | (v >> 16);      /* lui t9, hi16 */
+	tramp[1] = 0x27390000 | (v & 0xffff);   /* addiu t9, t9, lo16 */
+	tramp[2] = 0x03200008;                  /* jr t9 */
+	tramp[3] = 0x00000000;                  /* nop */
+
+	return (Elf_Addr) tramp;
+}
+
+static Elf_Addr add_plt_entry(struct module *me, void *location, Elf_Addr v)
+{
+	if (is_phys_addr(location))
+		return add_plt_entry_to(&me->arch.phys_plt_offset,
+				me->arch.phys_plt_tbl, v);
+	else
+		return add_plt_entry_to(&me->arch.virt_plt_offset,
+				me->arch.virt_plt_tbl, v);
+
+}
+
 static int apply_r_mips_26_rel(struct module *me, u32 *location, Elf_Addr v)
 {
+	u32 ofs = *location & 0x03ffffff;
+
 	if (v % 4) {
 		pr_err("module %s: dangerous R_MIPS_26 REL relocation\n",
 		       me->name);
@@ -72,14 +308,17 @@ static int apply_r_mips_26_rel(struct mo
 	}
 
 	if ((v & 0xf0000000) != (((unsigned long)location + 4) & 0xf0000000)) {
-		printk(KERN_ERR
-		       "module %s: relocation overflow\n",
-		       me->name);
-		return -ENOEXEC;
+		v = add_plt_entry(me, location, v + (ofs << 2));
+		if (!v) {
+			printk(KERN_ERR
+				"module %s: relocation overflow\n", me->name);
+			return -ENOEXEC;
+		}
+		ofs = 0;
 	}
 
 	*location = (*location & ~0x03ffffff) |
-		    ((*location + (v >> 2)) & 0x03ffffff);
+		    ((ofs + (v >> 2)) & 0x03ffffff);
 
 	return 0;
 }
@@ -286,11 +525,32 @@ int module_finalize(const Elf_Ehdr *hdr,
 		list_add(&me->arch.dbe_list, &dbe_list);
 		spin_unlock_irq(&dbe_lock);
 	}
+
+	/* Get rid of the fixup trampoline if we're running the module
+	 * from physically mapped address space */
+	if (me->arch.phys_plt_offset == 0) {
+		__module_free(me->arch.phys_plt_tbl);
+		me->arch.phys_plt_tbl = NULL;
+	}
+	if (me->arch.virt_plt_offset == 0) {
+		__module_free(me->arch.virt_plt_tbl);
+		me->arch.virt_plt_tbl = NULL;
+	}
+
 	return 0;
 }
 
 void module_arch_cleanup(struct module *mod)
 {
+	if (mod->arch.phys_plt_tbl) {
+		__module_free(mod->arch.phys_plt_tbl);
+		mod->arch.phys_plt_tbl = NULL;
+	}
+	if (mod->arch.virt_plt_tbl) {
+		__module_free(mod->arch.virt_plt_tbl);
+		mod->arch.virt_plt_tbl = NULL;
+	}
+
 	spin_lock_irq(&dbe_lock);
 	list_del(&mod->arch.dbe_list);
 	spin_unlock_irq(&dbe_lock);