Commit 555460e7 authored by Mika Westerberg's avatar Mika Westerberg Committed by Wen Zhiwei
Browse files

thunderbolt: Send uevent after asymmetric/symmetric switch 

stable inclusion
from stable-v6.6.54
commit 3dc5525d59da013e4c2e032c90ab16421d46732f
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/IAZ3K2

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=3dc5525d59da013e4c2e032c90ab16421d46732f



--------------------------------

commit 5391bcfa56c79a891734e4d22aa0ca3217b86491 upstream.

We should send uevent to userspace whenever the link speed or width
changes but tb_switch_asym_enable() and tb_switch_asym_disable() set the
sw->link_width already so tb_switch_update_link_attributes() never
noticed the change.

Fix this so that we let tb_switch_update_link_attributes() update the
fields accordingly.

Fixes: 81af2952e606 ("thunderbolt: Add support for asymmetric link")
Reported-by: default avatarPengfei Xu <pengfei.xu@intel.com>
Tested-by: default avatarPengfei Xu <pengfei.xu@intel.com>
Signed-off-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarWen Zhiwei <wenzhiwei@kylinos.cn>
parent 9d856b7e

drivers/thunderbolt/switch.c

+2 −2
Original line number Diff line number Diff line
@@ -2981,6 +2981,7 @@ static int tb_switch_lane_bonding_disable(struct tb_switch *sw) 
	return tb_port_wait_for_link_width(down, TB_LINK_WIDTH_SINGLE, 100);

}



/* Note updating sw->link_width done in tb_switch_update_link_attributes() */

static int tb_switch_asym_enable(struct tb_switch *sw, enum tb_link_width width)

{

	struct tb_port *up, *down, *port;
@@ -3020,10 +3021,10 @@ static int tb_switch_asym_enable(struct tb_switch *sw, enum tb_link_width width) 
			return ret;

	}



	sw->link_width = width;

	return 0;

}



/* Note updating sw->link_width done in tb_switch_update_link_attributes() */

static int tb_switch_asym_disable(struct tb_switch *sw)

{

	struct tb_port *up, *down;
@@ -3058,7 +3059,6 @@ static int tb_switch_asym_disable(struct tb_switch *sw) 
			return ret;

	}



	sw->link_width = TB_LINK_WIDTH_DUAL;

	return 0;

}