From: Chao Zeng chao.zeng@siemens.com
When operating the write-protection flash,spi_flash_std_write() and spi_flash_std_erase() would return wrong result.The flash is protected, but write or erase the flash would show "OK".
Check the flash write protection state if the write-protection has enbale before operating the flash.
Signed-off-by: Chao Zeng chao.zeng@siemens.com ---
drivers/mtd/spi/sf_probe.c | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/drivers/mtd/spi/sf_probe.c b/drivers/mtd/spi/sf_probe.c index 3befbe91ca..f06e6b88bd 100644 --- a/drivers/mtd/spi/sf_probe.c +++ b/drivers/mtd/spi/sf_probe.c @@ -109,6 +109,11 @@ static int spi_flash_std_write(struct udevice *dev, u32 offset, size_t len, struct mtd_info *mtd = &flash->mtd; size_t retlen;
+ if (flash->flash_is_locked && flash->flash_is_locked(flash, offset, len)) { + debug("SF: Flash is locked\n"); + return -ENOPROTOOPT; + } + return mtd->_write(mtd, offset, len, &retlen, buf); }
@@ -127,6 +132,11 @@ static int spi_flash_std_erase(struct udevice *dev, u32 offset, size_t len) instr.addr = offset; instr.len = len;
+ if (flash->flash_is_locked && flash->flash_is_locked(flash, offset, len)) { + debug("SF: Flash is locked\n"); + return -ENOPROTOOPT; + } + return mtd->_erase(mtd, &instr); }