cpufreq: imx6q: add return value check for voltage scale

index c2d30765bf3d..a4ede00483d1 100644
@@ -105,8 +105,13 @@ static int imx6q_set_target(struct cpufreq_policy *policy, unsigned int index)
 	/* Ensure the arm clock divider is what we expect */
 	ret = clk_set_rate(arm_clk, new_freq * 1000);
 	if (ret) {
+		int ret1;
+
 		dev_err(cpu_dev, "failed to set clock rate: %d\n", ret);
-		regulator_set_voltage_tol(arm_reg, volt_old, 0);
+		ret1 = regulator_set_voltage_tol(arm_reg, volt_old, 0);
+		if (ret1)
+			dev_warn(cpu_dev,
+				 "failed to restore vddarm voltage: %d\n", ret1);
 		return ret;
 	}
 

index 819777d0e91f..d944a1efa3c8 100644
@@ -82,6 +82,7 @@
 #define ARM_CPU_XSCALE_ARCH_V3		0x6000
 
 extern unsigned int processor_id;
+struct proc_info_list *lookup_processor(u32 midr);
 
 #ifdef CONFIG_CPU_CP15
 #define read_cpuid(reg)							\

index 306e1ac2c8e3..8e8c42c1d98f 100644
@@ -578,22 +578,29 @@ static void __init smp_build_mpidr_hash(void)
 }
 #endif
 
-static void __init setup_processor(void)
+/*
+ * locate processor in the list of supported processor types.  The linker
+ * builds this table for us from the entries in arch/arm/mm/proc-*.S
+ */
+struct proc_info_list *lookup_processor(u32 midr)
 {
-	struct proc_info_list *list;
+	struct proc_info_list *list = lookup_processor_type(midr);
 
-	/*
-	 * locate processor in the list of supported processor
-	 * types.  The linker builds this table for us from the
-	 * entries in arch/arm/mm/proc-*.S
-	 */
-	list = lookup_processor_type(read_cpuid_id());
 	if (!list) {
-		pr_err("CPU configuration botched (ID %08x), unable to continue.\n",
-		       read_cpuid_id());
-		while (1);
+		pr_err("CPU%u: configuration botched (ID %08x), CPU halted\n",
+		       smp_processor_id(), midr);
+		while (1)
+		/* can't use cpu_relax() here as it may require MMU setup */;
 	}
 
+	return list;
+}
+
+static void __init setup_processor(void)
+{
+	unsigned int midr = read_cpuid_id();
+	struct proc_info_list *list = lookup_processor(midr);
+
 	cpu_name = list->cpu_name;
 	__cpu_architecture = __get_cpu_architecture();
 

@@ -611,7 +618,7 @@ static void __init setup_processor(void)
 #endif
 
 	pr_info("CPU: %s [%08x] revision %d (ARMv%s), cr=%08lx\n",
-		cpu_name, read_cpuid_id(), read_cpuid_id() & 15,
+		list->cpu_name, midr, midr & 15,
 		proc_arch[cpu_architecture()], get_cr());
 
 	snprintf(init_utsname()->machine, __NEW_UTS_LEN + 1, "%s%c",

index 6f6b829c9e8e..42e93bf496e7 100644
@@ -272,13 +272,7 @@ static bool generic_key_to_expire(struct rpc_cred *cred)
 {
 	struct auth_cred *acred = &container_of(cred, struct generic_cred,
 						gc_base)->acred;
-	bool ret;
-
-	get_rpccred(cred);
-	ret = test_bit(RPC_CRED_KEY_EXPIRE_SOON, &acred->ac_flags);
-	put_rpccred(cred);
-
-	return ret;
+	return test_bit(RPC_CRED_KEY_EXPIRE_SOON, &acred->ac_flags);
 }
 
 static const struct rpc_credops generic_credops = {

index 681c8b42e013..1c6b7055f11f 100644
@@ -215,7 +215,7 @@ static char *kdb_read(char *buffer, size_t bufsize)
 	int count;
 	int i;
 	int diag, dtab_count;
-	int key;
+	int key, buf_size, ret;
 
 
 	diag = kdbgetintenv("DTABCOUNT", &dtab_count);

@@ -335,9 +335,8 @@ static char *kdb_read(char *buffer, size_t bufsize)
 		else
 			p_tmp = tmpbuffer;
 		len = strlen(p_tmp);
-		count = kallsyms_symbol_complete(p_tmp,
-						 sizeof(tmpbuffer) -
-						 (p_tmp - tmpbuffer));
+		buf_size = sizeof(tmpbuffer) - (p_tmp - tmpbuffer);
+		count = kallsyms_symbol_complete(p_tmp, buf_size);
 		if (tab == 2 && count > 0) {
 			kdb_printf("\n%d symbols are found.", count);
 			if (count > dtab_count) {

@@ -349,9 +348,13 @@ static char *kdb_read(char *buffer, size_t bufsize)
 			}
 			kdb_printf("\n");
 			for (i = 0; i < count; i++) {
-				if (WARN_ON(!kallsyms_symbol_next(p_tmp, i)))
+				ret = kallsyms_symbol_next(p_tmp, i, buf_size);
+				if (WARN_ON(!ret))
 					break;
-				kdb_printf("%s ", p_tmp);
+				if (ret != -E2BIG)
+					kdb_printf("%s ", p_tmp);
+				else
+					kdb_printf("%s... ", p_tmp);
 				*(p_tmp + len) = '\0';
 			}
 			if (i >= dtab_count)

index 7afd3c8c41d5..439f1c8b1193 100644
@@ -83,7 +83,7 @@ typedef struct __ksymtab {
 		unsigned long sym_start;
 		unsigned long sym_end;
 		} kdb_symtab_t;
-extern int kallsyms_symbol_next(char *prefix_name, int flag);
+extern int kallsyms_symbol_next(char *prefix_name, int flag, int buf_size);
 extern int kallsyms_symbol_complete(char *prefix_name, int max_len);
 
 /* Exported Symbols for kernel loadable modules to use. */

index d35cc2d3a4cc..2aed4a33521b 100644
@@ -221,11 +221,13 @@ int kallsyms_symbol_complete(char *prefix_name, int max_len)
  * Parameters:
  *	prefix_name	prefix of a symbol name to lookup
  *	flag	0 means search from the head, 1 means continue search.
+ *	buf_size	maximum length that can be written to prefix_name
+ *			buffer
  * Returns:
  *	1 if a symbol matches the given prefix.
  *	0 if no string found
  */
-int kallsyms_symbol_next(char *prefix_name, int flag)
+int kallsyms_symbol_next(char *prefix_name, int flag, int buf_size)
 {
 	int prefix_len = strlen(prefix_name);
 	static loff_t pos;

@@ -235,10 +237,8 @@ int kallsyms_symbol_next(char *prefix_name, int flag)
 		pos = 0;
 
 	while ((name = kdb_walk_kallsyms(&pos))) {
-		if (strncmp(name, prefix_name, prefix_len) == 0) {
-			strncpy(prefix_name, name, strlen(name)+1);
-			return 1;
-		}
+		if (!strncmp(name, prefix_name, prefix_len))
+			return strscpy(prefix_name, name, buf_size);
 	}
 	return 0;
 }

index b9d1dfdbe5bb..ae9d3bf79612 100644
@@ -1479,7 +1479,7 @@ static long vphn_get_associativity(unsigned long cpu,
 
 	switch (rc) {
 	case H_FUNCTION:
-		printk(KERN_INFO
+		printk_once(KERN_INFO
 			"VPHN is not supported. Disabling polling...\n");
 		stop_topology_update();
 		break;

index 371d5eca80ed..64c33e3dbe69 100644
@@ -1805,9 +1805,7 @@ static loff_t shmem_file_llseek(struct file *file, loff_t offset, int whence)
 	mutex_lock(&inode->i_mutex);
 	/* We're holding i_mutex so we can access i_size directly */
 
-	if (offset < 0)
-		offset = -EINVAL;
-	else if (offset >= inode->i_size)
+	if (offset < 0 || offset >= inode->i_size)
 		offset = -ENXIO;
 	else {
 		start = offset >> PAGE_CACHE_SHIFT;