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hw/block: m25p80: Don't write to flash if write is disabled 

When write is disabled, the write to flash should be avoided
in flash_write8().

Fixes: 82a2499011 ("m25p80: Initial implementation of SPI flash device")
Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Francisco Iglesias <frasse.iglesias@gmail.com>
Message-id: 1608688825-81519-1-git-send-email-bmeng.cn@gmail.com
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Bin Meng 2020-12-23 10:00:24 +08:00 committed by Alistair Francis
parent 825a215c00
commit 1695854b37
1 changed files with 1 additions and 0 deletions
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hw/block/m25p80.c
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@ -601,6 +601,7 @@ void flash_write8(Flash *s, uint32_t addr, uint8_t data)
if (!s->write_enable) {
qemu_log_mask(LOG_GUEST_ERROR, "M25P80: write with write protect!\n");
return;
}
if ((prev ^ data) & data) {