flash: add error handling to get_flash_by_addr/name

autoprobing can fail and this error has to be
reported up the call stack.

Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>

diff --git a/src/flash/nor/core.c b/src/flash/nor/core.c
index 429bad6762dcbe606cb776f5f39e1eceefc4cfd0..d2f2754d67ce714b94605f8211b7b50bd491cbb9 100644 (file)
--- a/src/flash/nor/core.c
+++ b/src/flash/nor/core.c
@@ -197,7 +197,7 @@ struct flash_bank *get_flash_bank_by_name_noprobe(const char *name)
        return NULL;
 }
 
-struct flash_bank *get_flash_bank_by_name(const char *name)
+int get_flash_bank_by_name(const char *name, struct flash_bank **bank_result)
 {
        struct flash_bank *bank;
        int retval;
@@ -210,11 +210,12 @@ struct flash_bank *get_flash_bank_by_name(const char *name)
                if (retval != ERROR_OK)
                {
                        LOG_ERROR("auto_probe failed %d\n", retval);
-                       return NULL;
+                       return retval;
                }
        }
 
-       return bank;
+       *bank_result = bank;
+       return ERROR_OK;
 }
 
 int get_flash_bank_by_num(int num, struct flash_bank **bank)
@@ -238,8 +239,9 @@ int get_flash_bank_by_num(int num, struct flash_bank **bank)
        return ERROR_OK;
 }
 
-/* lookup flash bank by address */
-struct flash_bank *get_flash_bank_by_addr(struct target *target, uint32_t addr)
+/* lookup flash bank by address, bank not found is success, but
+ * result_bank is set to NULL. */
+int get_flash_bank_by_addr(struct target *target, uint32_t addr, bool check, struct flash_bank **result_bank)
 {
        struct flash_bank *c;
 
@@ -252,14 +254,22 @@ struct flash_bank *get_flash_bank_by_addr(struct target *target, uint32_t addr)
                if (retval != ERROR_OK)
                {
                        LOG_ERROR("auto_probe failed %d\n", retval);
-                       return NULL;
+                       return retval;
                }
                /* check whether address belongs to this flash bank */
                if ((addr >= c->base) && (addr <= c->base + (c->size - 1)) && target == c->target)
-                       return c;
+               {
+                       *result_bank = c;
+                       return ERROR_OK;
+               }
        }
-       LOG_ERROR("No flash at address 0x%08" PRIx32 "\n", addr);
-       return NULL;
+       *result_bank = NULL;
+       if (check)
+       {
+               LOG_ERROR("No flash at address 0x%08" PRIx32 "\n", addr);
+               return ERROR_FAIL;
+       }
+       return ERROR_OK;
 }
 
 int default_flash_mem_blank_check(struct flash_bank *bank)
@@ -379,8 +389,9 @@ static int flash_iterate_address_range(struct target *target,
        int last = -1;
        int i;
 
-       if ((c = get_flash_bank_by_addr(target, addr)) == NULL)
-               return ERROR_FLASH_DST_OUT_OF_BANK; /* no corresponding bank found */
+       int retval = get_flash_bank_by_addr(target, addr, true, &c);
+       if (retval != ERROR_OK)
+               return retval;
 
        if (c->size == 0 || c->num_sectors == 0)
        {
@@ -588,7 +599,11 @@ int flash_write_unlock(struct target *target, struct image *image,
                }
 
                /* find the corresponding flash bank */
-               if ((c = get_flash_bank_by_addr(target, run_address)) == NULL)
+               int retval;
+               retval = get_flash_bank_by_addr(target, run_address, false, &c);
+               if (retval != ERROR_OK)
+                       return retval;
+               if (c == NULL)
                {
                        section++; /* and skip it */
                        section_offset = 0;

diff --git a/src/flash/nor/core.h b/src/flash/nor/core.h
index 17f1c53f9276da5ad4d9e6298a8c053a07736856..ff14df0a3184852058c7f91a5525ee48a50bdc41 100644 (file)
--- a/src/flash/nor/core.h
+++ b/src/flash/nor/core.h
@@ -168,7 +168,7 @@ int default_flash_mem_blank_check(struct flash_bank *bank);
  * bank number: when two str9x banks are defined, then 'str9x.1' refers
  * to the second.
  */
-struct flash_bank *get_flash_bank_by_name(const char *name);
+int get_flash_bank_by_name(const char *name, struct flash_bank **bank_result);
 /**
  * Returns the flash bank specified by @a name, which matches the
  * driver name and a suffix (option) specify the driver-specific
@@ -206,8 +206,9 @@ struct flash_bank *get_flash_bank_by_num_noprobe(int num);
  * Returns the flash bank located at a specified address.
  * @param target The target, presumed to contain one or more banks.
  * @param addr An address that is within the range of the bank.
+ * @param check return ERROR_OK and result_bank NULL if the bank does not exist
  * @returns The struct flash_bank located at @a addr, or NULL.
  */
-struct flash_bank *get_flash_bank_by_addr(struct target *target, uint32_t addr);
+int get_flash_bank_by_addr(struct target *target, uint32_t addr, bool check, struct flash_bank **result_bank);
 
 #endif // FLASH_NOR_CORE_H

diff --git a/src/flash/nor/tcl.c b/src/flash/nor/tcl.c
index cf1ca4af150b349bb08ed73f7551429cd19ac60a..3d67327fd3ca771145354eecd6b5530831891c8f 100644 (file)
--- a/src/flash/nor/tcl.c
+++ b/src/flash/nor/tcl.c
@@ -35,7 +35,9 @@ COMMAND_HELPER(flash_command_get_bank, unsigned name_index,
                struct flash_bank **bank)
 {
        const char *name = CMD_ARGV[name_index];
-       *bank = get_flash_bank_by_name(name);
+       int retval = get_flash_bank_by_name(name, bank);
+       if (retval != ERROR_OK)
+               return retval;
        if (*bank)
                return ERROR_OK;
 
@@ -238,11 +240,9 @@ COMMAND_HANDLER(handle_flash_erase_address_command)
                return ERROR_COMMAND_SYNTAX_ERROR;
        }
 
-       p = get_flash_bank_by_addr(target, address);
-       if (p == NULL)
-       {
-               return ERROR_FAIL;
-       }
+       retval = get_flash_bank_by_addr(target, address, true, &p);
+       if (retval != ERROR_OK)
+               return retval;
 
        /* We can't know if we did a resume + halt, in which case we no longer know the erased state */
        flash_set_dirty();
@@ -544,12 +544,9 @@ COMMAND_HANDLER(handle_flash_fill_command)
        {
                struct flash_bank *bank;
 
-               bank = get_flash_bank_by_addr(target, address);
-               if (bank == NULL)
-               {
-                       retval = ERROR_FAIL;
+               retval = get_flash_bank_by_addr(target, address, true, &bank );
+               if (retval != ERROR_OK)
                        goto done;
-               }
 
                cur_size = MIN((count * wordsize - wrote), chunksize);
                err = flash_driver_write(bank, chunk, address - bank->base + wrote, cur_size);