thunderbolt: Use maximum USB3 link rate when reclaiming if link is not up (813050e0) · Commits · 戴 / test

If the USB3 link is not up the actual link rate is 0 so when reclaiming bandwidth we should look at maximum supported link rate instead. Cc: stable@vger.kernel.org Fixes: ("thunderbolt: Add USB3 bandwidth management") Signed-off-by:

Mika Westerberg <mika.westerberg@linux.intel.com>

drivers/thunderbolt/tunnel.c

+10 −2

Original line number	Diff line number	Diff line
		@@ -951,10 +951,18 @@ static void tb_usb3_reclaim_available_bandwidth(struct tb_tunnel *tunnel,
		int ret, max_rate, allocate_up, allocate_down;

		ret = usb4_usb3_port_actual_link_rate(tunnel->src_port);
		if (ret <= 0) {
		tb_tunnel_warn(tunnel, "tunnel is not up\n");
		if (ret < 0) {
		tb_tunnel_warn(tunnel, "failed to read actual link rate\n");
		return;
		} else if (!ret) {
		/* Use maximum link rate if the link valid is not set */
		ret = usb4_usb3_port_max_link_rate(tunnel->src_port);
		if (ret < 0) {
		tb_tunnel_warn(tunnel, "failed to read maximum link rate\n");
		return;
		}
		}

		/*
		* 90% of the max rate can be allocated for isochronous
		* transfers.

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