22 Apr
2020
22 Apr
'20
7:44 a.m.
On Wed, Apr 22, 2020 at 12:51 AM Sylwester Nawrocki s.nawrocki@samsung.com wrote:
In current code there is no cache flush after initializing the scratchpad buffer array with the scratchpad buffer pointers. This leads to a failure of the "slot enable" command on the rpi4 board (Broadcom STB PCIe controller + VL805 USB hub) - the very first TRB transfer on the command ring fails and there is a timeout while waiting for the command completion event. After adding the missing cache flush everything seems to be working as expected.
Signed-off-by: Sylwester Nawrocki s.nawrocki@samsung.com
drivers/usb/host/xhci-mem.c | 3 +++ 1 file changed, 3 insertions(+)
Good catch!
Reviewed-by: Bin Meng bmeng.cn@gmail.com