From 8ccbed2476f2a615d5045a7c5c7b459db7dd9263 Mon Sep 17 00:00:00 2001 From: Mika Westerberg Date: Fri, 8 Jan 2021 12:55:49 +0200 Subject: thunderbolt: Do not re-establish XDomain DMA paths automatically This step is actually not needed. The service drivers themselves will handle this once they have negotiated the service up and running again with the remote side. Also dropping this makes it easier to add support for multiple DMA tunnels over a single XDomain connection. Signed-off-by: Mika Westerberg --- drivers/thunderbolt/xdomain.c | 35 ++--------------------------------- 1 file changed, 2 insertions(+), 33 deletions(-) (limited to 'drivers/thunderbolt/xdomain.c') diff --git a/drivers/thunderbolt/xdomain.c b/drivers/thunderbolt/xdomain.c index 584bb5ec06f8..a1657663a95e 100644 --- a/drivers/thunderbolt/xdomain.c +++ b/drivers/thunderbolt/xdomain.c @@ -946,19 +946,6 @@ static int populate_properties(struct tb_xdomain *xd, return 0; } -/* Called with @xd->lock held */ -static void tb_xdomain_restore_paths(struct tb_xdomain *xd) -{ - if (!xd->resume) - return; - - xd->resume = false; - if (xd->transmit_path) { - dev_dbg(&xd->dev, "re-establishing DMA path\n"); - tb_domain_approve_xdomain_paths(xd->tb, xd); - } -} - static inline struct tb_switch *tb_xdomain_parent(struct tb_xdomain *xd) { return tb_to_switch(xd->dev.parent); @@ -1084,16 +1071,8 @@ static void tb_xdomain_get_properties(struct work_struct *work) mutex_lock(&xd->lock); /* Only accept newer generation properties */ - if (xd->properties && gen <= xd->property_block_gen) { - /* - * On resume it is likely that the properties block is - * not changed (unless the other end added or removed - * services). However, we need to make sure the existing - * DMA paths are restored properly. - */ - tb_xdomain_restore_paths(xd); + if (xd->properties && gen <= xd->property_block_gen) goto err_free_block; - } dir = tb_property_parse_dir(block, ret); if (!dir) { @@ -1118,8 +1097,6 @@ static void tb_xdomain_get_properties(struct work_struct *work) tb_xdomain_update_link_attributes(xd); - tb_xdomain_restore_paths(xd); - mutex_unlock(&xd->lock); kfree(block); @@ -1332,15 +1309,7 @@ static int __maybe_unused tb_xdomain_suspend(struct device *dev) static int __maybe_unused tb_xdomain_resume(struct device *dev) { - struct tb_xdomain *xd = tb_to_xdomain(dev); - - /* - * Ask tb_xdomain_get_properties() restore any existing DMA - * paths after properties are re-read. - */ - xd->resume = true; - start_handshake(xd); - + start_handshake(tb_to_xdomain(dev)); return 0; } -- cgit v1.2.3