[Qemu-devel] xhci: move command stop and command abort flag check to the case when the crcr_low register is set

[Jaroslav Jindrák]

Hello,

I'd like to submit a patch to the xhci subsystem of QEMU. Currently, when
the command stop or command abort flags in the crcr_low register are set,
nothing happens. This is because the part of the code that tests those two
flags (and performs command ring abort/stop) is in the crcr_high case. This
error has a simple workaround - after writing to the crcr_low register with
either of these two flags set, one can write the value of crcr_high to
crcr_high, so I assume this fix does not have that big of a priority, but a
driver that follows the specification strictly would misbehave in this kind
of situation (stopping/aborting the command ring).

The patch is contained in the attachement.

​Kind​ regards,
Jaroslav Jindrak

xhci_crcr_patch.patch
Description: Text Data