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flash/nor/core: Fix chunk size calculation in default_flash_mem_blank_check 

Slow version of blank check procedure reads target memory sector-by-sector
using 1 KB chunks. Due to bug in chunk size calculation algorithm the actual
size of the chunk is always 1 KB even if sector size is smaller.
This causes out-of-boundary read of the last sector.

Steps to reproduce:
1) Use target with small sectors (e.g. psoc6 with 512-byte sectors)
2) set WORKAREASIZE_CM0 0
3) flash erase_check 1

Running slow fallback erase check - add working memory
Info : SWD DPIDR 0x6ba02477
Error: Failed to read memory at 0x14008000
unknown error when checking erase state of flash bank #1 at 0x14000000
	Bank is erased

Change-Id: I03d0d5fb3a1950ae6aac425f5e24c7fd94b38325
Signed-off-by: Bohdan Tymkiv <bhdt@cypress.com>
Reviewed-on: http://openocd.zylin.com/4785
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
This commit is contained in:
Bohdan Tymkiv 2018-12-05 11:57:26 +02:00 committed by Tomas Vanek
parent f197483f57
commit 02279e2f5e
1 changed files with 2 additions and 2 deletions
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4
src/flash/nor/core.c
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@ -322,8 +322,8 @@ static int default_flash_mem_blank_check(struct flash_bank *bank)
for (j = 0; j < bank->sectors[i].size; j += buffer_size) {
uint32_t chunk;
chunk = buffer_size;
if (chunk > (j - bank->sectors[i].size))
chunk = (j - bank->sectors[i].size);
if (chunk > (bank->sectors[i].size - j))
chunk = (bank->sectors[i].size - j);
retval = target_read_memory(target,
bank->base + bank->sectors[i].offset + j,