[Qemu-devel] ui/gtk.c does not check qemu_chr_be_can_write()

[Michael Walle]

Hi Anthony, Hi Gerd,

the GTK frontend does not respect the the "chr_can_read" hook. The 
frontend just writes characters to the device using qemu_chr_be_write() 
without checking if the device can receive any input 
(qemu_chr_be_can_write()).

At least for my device model (hw/char/milkymist-uart.c), this results in 
an assertion because the rx callback asserts if there is already a 
character in the buffer. It assumes that the uart_rx callback is only 
called, if the uart_can_rx callback returns a value >0.

Do I make a wrong assumption here?

-michael