Am 2022-02-02 07:35, schrieb Jan Kiszka:
From: Jan Kiszka jan.kiszka@siemens.com
Do not suggest successful operation if a flash area to be changed is actually locked, thus will not execute the request. Rather report an error and bail out. That's way more user-friendly than asking them to manually check for this case.
Derived from original patch by Chao Zeng.
Signed-off-by: Jan Kiszka jan.kiszka@siemens.com
This is the successor of "[PATCH V3] sf: Querying write-protect status before operating the flash", moving the test into the CLI API, see https://lore.kernel.org/u-boot/20220117175628.GQ2631111@bill-the-cat/.
cmd/sf.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/cmd/sf.c b/cmd/sf.c index 8bdebd9fd8f..a24e04c690b 100644 --- a/cmd/sf.c +++ b/cmd/sf.c @@ -287,6 +287,12 @@ static int do_spi_flash_read_write(int argc, char *const argv[]) return 1; }
- if (strncmp(argv[0], "read", 4) != 0 && flash->flash_is_locked &&
flash->flash_is_locked(flash, offset, len)) {printf("ERROR: flash area is locked\n");return 1;- }
Much better to handle it here. But I'm not sure if this is doing the right thing:
Eventually, this function is called:
/* * Return 1 if the entire region is locked (if @locked is true) or unlocked (if * @locked is false); 0 otherwise */ static int stm_check_lock_status_sr(struct spi_nor *nor, loff_t ofs, u64 len, u8 sr, bool locked)
So I'd guess if you try to write to an area of the flash where only parts are locked, you still see it as unlocked and thus there will be no error. Which IMHO is even more confusing for a user.
-michael