Blackfin: kgdb: fix up error return values

The Blackfin kgdb code was all passing back positive errno values when it
really should have been using negative errno values.

Reported-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

diff --git a/arch/blackfin/kernel/kgdb.c b/arch/blackfin/kernel/kgdb.c
index b163f6d3330d4e0a9317ee116171f9718b5fd45d..c5362b2b9ed1b15c4086667f054390f8c08b7af6 100644 (file)
--- a/arch/blackfin/kernel/kgdb.c
+++ b/arch/blackfin/kernel/kgdb.c
@@ -466,7 +466,7 @@ static int validate_memory_access_address(unsigned long addr, int size)
        int cpu = raw_smp_processor_id();
 
        if (size < 0)
-               return EFAULT;
+               return -EFAULT;
        if (addr >= 0x1000 && (addr + size) <= physical_mem_end)
                return 0;
        if (addr >= SYSMMR_BASE)
@@ -498,7 +498,7 @@ static int validate_memory_access_address(unsigned long addr, int size)
        if (IN_MEM(addr, size, L2_START, L2_LENGTH))
                return 0;
 
-       return EFAULT;
+       return -EFAULT;
 }
 
 /*
@@ -508,14 +508,15 @@ static int validate_memory_access_address(unsigned long addr, int size)
 int kgdb_mem2hex(char *mem, char *buf, int count)
 {
        char *tmp;
-       int err = 0;
+       int err;
        unsigned char *pch;
        unsigned short mmr16;
        unsigned long mmr32;
        int cpu = raw_smp_processor_id();
 
-       if (validate_memory_access_address((unsigned long)mem, count))
-               return EFAULT;
+       err = validate_memory_access_address((unsigned long)mem, count);
+       if (err)
+               return err;
 
        /*
         * We use the upper half of buf as an intermediate buffer for the
@@ -533,7 +534,7 @@ int kgdb_mem2hex(char *mem, char *buf, int count)
                                *tmp++ = *pch++;
                                tmp -= 2;
                        } else
-                               err = EFAULT;
+                               err = -EFAULT;
                        break;
                case 4:
                        if ((unsigned int)mem % 4 == 0) {
@@ -545,10 +546,10 @@ int kgdb_mem2hex(char *mem, char *buf, int count)
                                *tmp++ = *pch++;
                                tmp -= 4;
                        } else
-                               err = EFAULT;
+                               err = -EFAULT;
                        break;
                default:
-                       err = EFAULT;
+                       err = -EFAULT;
                }
        } else if ((cpu == 0 && IN_MEM(mem, count, L1_CODE_START, L1_CODE_LENGTH))
 #ifdef CONFIG_SMP
@@ -557,7 +558,7 @@ int kgdb_mem2hex(char *mem, char *buf, int count)
                ) {
                /* access L1 instruction SRAM*/
                if (dma_memcpy(tmp, mem, count) == NULL)
-                       err = EFAULT;
+                       err = -EFAULT;
        } else
                err = probe_kernel_read(tmp, mem, count);
 
@@ -585,7 +586,7 @@ int kgdb_ebin2mem(char *buf, char *mem, int count)
        char *tmp_new;
        unsigned short *mmr16;
        unsigned long *mmr32;
-       int err = 0;
+       int err;
        int size = 0;
        int cpu = raw_smp_processor_id();
 
@@ -601,8 +602,9 @@ int kgdb_ebin2mem(char *buf, char *mem, int count)
                size++;
        }
 
-       if (validate_memory_access_address((unsigned long)mem, size))
-               return EFAULT;
+       err = validate_memory_access_address((unsigned long)mem, size);
+       if (err)
+               return err;
 
        if ((unsigned int)mem >= SYSMMR_BASE) { /*access MMR registers*/
                switch (size) {
@@ -611,17 +613,17 @@ int kgdb_ebin2mem(char *buf, char *mem, int count)
                                mmr16 = (unsigned short *)buf;
                                *(unsigned short *)mem = *mmr16;
                        } else
-                               return EFAULT;
+                               err = -EFAULT;
                        break;
                case 4:
                        if ((unsigned int)mem % 4 == 0) {
                                mmr32 = (unsigned long *)buf;
                                *(unsigned long *)mem = *mmr32;
                        } else
-                               return EFAULT;
+                               err = -EFAULT;
                        break;
                default:
-                       return EFAULT;
+                       err = -EFAULT;
                }
        } else if ((cpu == 0 && IN_MEM(mem, count, L1_CODE_START, L1_CODE_LENGTH))
 #ifdef CONFIG_SMP
@@ -630,7 +632,7 @@ int kgdb_ebin2mem(char *buf, char *mem, int count)
                ) {
                /* access L1 instruction SRAM */
                if (dma_memcpy(mem, buf, size) == NULL)
-                       err = EFAULT;
+                       err = -EFAULT;
        } else
                err = probe_kernel_write(mem, buf, size);
 
@@ -648,10 +650,12 @@ int kgdb_hex2mem(char *buf, char *mem, int count)
        char *tmp_hex;
        unsigned short *mmr16;
        unsigned long *mmr32;
+       int err;
        int cpu = raw_smp_processor_id();
 
-       if (validate_memory_access_address((unsigned long)mem, count))
-               return EFAULT;
+       err = validate_memory_access_address((unsigned long)mem, count);
+       if (err)
+               return err;
 
        /*
         * We use the upper half of buf as an intermediate buffer for the
@@ -673,17 +677,17 @@ int kgdb_hex2mem(char *buf, char *mem, int count)
                                mmr16 = (unsigned short *)tmp_raw;
                                *(unsigned short *)mem = *mmr16;
                        } else
-                               return EFAULT;
+                               err = -EFAULT;
                        break;
                case 4:
                        if ((unsigned int)mem % 4 == 0) {
                                mmr32 = (unsigned long *)tmp_raw;
                                *(unsigned long *)mem = *mmr32;
                        } else
-                               return EFAULT;
+                               err = -EFAULT;
                        break;
                default:
-                       return EFAULT;
+                       err = -EFAULT;
                }
        } else if ((cpu == 0 && IN_MEM(mem, count, L1_CODE_START, L1_CODE_LENGTH))
 #ifdef CONFIG_SMP
@@ -692,10 +696,11 @@ int kgdb_hex2mem(char *buf, char *mem, int count)
                ) {
                /* access L1 instruction SRAM */
                if (dma_memcpy(mem, tmp_raw, count) == NULL)
-                       return EFAULT;
+                       err = -EFAULT;
        } else
-               return probe_kernel_write(mem, tmp_raw, count);
-       return 0;
+               err = probe_kernel_write(mem, tmp_raw, count);
+
+       return err;
 }
 
 int kgdb_validate_break_address(unsigned long addr)
@@ -715,7 +720,7 @@ int kgdb_validate_break_address(unsigned long addr)
        if (IN_MEM(addr, BREAK_INSTR_SIZE, L2_START, L2_LENGTH))
                return 0;
 
-       return EFAULT;
+       return -EFAULT;
 }
 
 int kgdb_arch_set_breakpoint(unsigned long addr, char *saved_instr)