FAILED: patch "[PATCH] thunderbolt: Fix setting the CNS bit in ROUTER_CS_5" failed to apply to 5.15-stable tree

[<gregkh@linuxfoundation.org>]

The patch below does not apply to the 5.15-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y
git checkout FETCH_HEAD
git cherry-pick -x ec4d82f855ce332de26fe080892483de98cc1a19
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2024021901-java-rejoice-9b51@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..

Possible dependencies:

ec4d82f855ce ("thunderbolt: Fix setting the CNS bit in ROUTER_CS_5")
d49b4f043d63 ("thunderbolt: Add support for enhanced uni-directional TMU mode")
bdc6660e553a ("thunderbolt: Do not call CLx functions from TMU code")
12a14f2fca32 ("thunderbolt: Move CLx support functions into clx.c")
ef34add89ee4 ("thunderbolt: Check valid TMU configuration in tb_switch_tmu_configure()")
4e7b4955cba1 ("thunderbolt: Move tb_enable_tmu() close to other TMU functions")
20c2fae9dbe3 ("thunderbolt: Move TMU configuration to tb_enable_tmu()")
7d283f4148f1 ("thunderbolt: Get rid of tb_switch_enable_tmu_1st_child()")
701e73a823bb ("thunderbolt: Rework Titan Ridge TMU objection disable function")
826f55d50de9 ("thunderbolt: Drop useless 'unidirectional' parameter from tb_switch_tmu_is_enabled()")
c437dcb18310 ("thunderbolt: Fix a couple of style issues in TMU code")
7ce542219b63 ("thunderbolt: Introduce tb_switch_downstream_port()")
3fe95742af29 ("thunderbolt: Do not touch CL state configuration during discovery")
d31137619776 ("thunderbolt: Use correct type in tb_port_is_clx_enabled() prototype")
d0f1e0c2a699 ("thunderbolt: Add support for receiver lane margining")
b12d2955e732 ("thunderbolt: Add helper to check if CL states are enabled on port")
3846d011403b ("thunderbolt: Pass CL state bitmask to tb_port_clx_supported()")
95f8f1cbc87b ("thunderbolt: Move port CL state functions into correct place in switch.c")
b60e31bf18a7 ("thunderbolt: Add DP OUT resource when DP tunnel is discovered")
9e2e5ea3b28f ("Merge tag 'usb-6.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From ec4d82f855ce332de26fe080892483de98cc1a19 Mon Sep 17 00:00:00 2001
From: Mohammad Rahimi <rahimi.mhmmd@gmail.com>
Date: Sat, 27 Jan 2024 11:26:28 +0800
Subject: [PATCH] thunderbolt: Fix setting the CNS bit in ROUTER_CS_5

The bit 23, CM TBT3 Not Supported (CNS), in ROUTER_CS_5 indicates
whether a USB4 Connection Manager is TBT3-Compatible and should be:
    0b for TBT3-Compatible
    1b for Not TBT3-Compatible

Fixes: b04079837b20 ("thunderbolt: Add initial support for USB4")
Cc: stable@vger.kernel.org
Signed-off-by: Mohammad Rahimi <rahimi.mhmmd@gmail.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>

diff --git a/drivers/thunderbolt/tb_regs.h b/drivers/thunderbolt/tb_regs.h
index 87e4795275fe..6f798f6a2b84 100644
--- a/drivers/thunderbolt/tb_regs.h
+++ b/drivers/thunderbolt/tb_regs.h
@@ -203,7 +203,7 @@ struct tb_regs_switch_header {
 #define ROUTER_CS_5_WOP				BIT(1)
 #define ROUTER_CS_5_WOU				BIT(2)
 #define ROUTER_CS_5_WOD				BIT(3)
-#define ROUTER_CS_5_C3S				BIT(23)
+#define ROUTER_CS_5_CNS				BIT(23)
 #define ROUTER_CS_5_PTO				BIT(24)
 #define ROUTER_CS_5_UTO				BIT(25)
 #define ROUTER_CS_5_HCO				BIT(26)
diff --git a/drivers/thunderbolt/usb4.c b/drivers/thunderbolt/usb4.c
index f8f0d24ff6e4..1515eff8cc3e 100644
--- a/drivers/thunderbolt/usb4.c
+++ b/drivers/thunderbolt/usb4.c
@@ -290,7 +290,7 @@ int usb4_switch_setup(struct tb_switch *sw)
 	}
 
 	/* TBT3 supported by the CM */
-	val |= ROUTER_CS_5_C3S;
+	val &= ~ROUTER_CS_5_CNS;
 
 	return tb_sw_write(sw, &val, TB_CFG_SWITCH, ROUTER_CS_5, 1);
 }