mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-17 09:14:19 +08:00
55c2d7884e
The 1.0 spec clearly states that you must set the ACKNOWLEDGE and DRIVER status bits before accessing the feature bits. This is a problem for the early console code, which doesn't really want to acknowledge the device (the spec specifically excepts writing to the console's emerg_wr from the usual ordering constrains). Instead, we check that the *size* of the device configuration is sufficient to hold emerg_wr: at worst (if the device doesn't support the VIRTIO_CONSOLE_F_EMERG_WRITE feature), it will ignore the writes. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> |
||
|---|---|---|
| .. | ||
| boot.c | ||
| head_32.S | ||
| Kconfig | ||
| Makefile | ||