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388161ca45
SPI NOR flashes will just ignore program commands if the OTP region is
locked. Thus, a user might not notice that the intended write didn't end
up in the flash. Return -EROFS to the user in this case. From what I can
tell, chips/cfi_cmdset_0001.c also return this error code.
One could optimize spi_nor_mtd_otp_range_is_locked() to read the status
register only once and not for every OTP region, but for that we would
need some more invasive changes. Given that this is
one-time-programmable memory and the normal access mode is reading, we
just live with the small overhead.
By moving the code around a bit, we can just check the length before
calling spi_nor_mtd_otp_range_is_locked() and avoid an underflow there
if a len is 0. This way we don't need to take the lock either. We also
skip the "*retlen = 0" assignment, mtdcore already takes care of that
for us.
Fixes:
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||
|---|---|---|
| .. | ||
| controllers | ||
| atmel.c | ||
| catalyst.c | ||
| core.c | ||
| core.h | ||
| eon.c | ||
| esmt.c | ||
| everspin.c | ||
| fujitsu.c | ||
| gigadevice.c | ||
| intel.c | ||
| issi.c | ||
| Kconfig | ||
| macronix.c | ||
| Makefile | ||
| micron-st.c | ||
| otp.c | ||
| sfdp.c | ||
| sfdp.h | ||
| spansion.c | ||
| sst.c | ||
| swp.c | ||
| winbond.c | ||
| xilinx.c | ||
| xmc.c | ||