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fix thunderbolt ring-interrupt not being masked on suspend

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Originally for v6.4-rc7 and now it also got already into some stable
trees, but not yet into a (released) ubuntu tag – so backport it
already.

Link: https://forum.proxmox.com/threads/133104/post-590457
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
This commit is contained in:
Thomas Lamprecht 2023-09-20 06:33:03 +02:00
parent ea64c38da4
commit d772676031
1 changed files with 49 additions and 0 deletions
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49
patches/kernel/0017-thunderbolt-Mask-ring-interrupt-on-Intel-hardware-as.patch Normal file
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@ -0,0 +1,49 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Mika Westerberg <mika.westerberg@linux.intel.com>
Date: Tue, 30 May 2023 08:48:29 +0300
Subject: [PATCH] thunderbolt: Mask ring interrupt on Intel hardware as well
When resuming from system sleep states the driver issues following
warning on Intel hardware:
thunderbolt 0000:07:00.0: interrupt for TX ring 0 is already enabled
The reason for this is that the commit in question did not mask the ring
interrupt on Intel hardware leaving the interrupt active. Fix this by
masking it also in Intel hardware.
Reported-by: beld zhang <beldzhang@gmail.com>
Tested-by: beld zhang <beldzhang@gmail.com>
Closes: https://lore.kernel.org/linux-usb/ZHKW5NeabmfhgLbY@debian.me/
Fixes: c4af8e3fecd0 ("thunderbolt: Clear registers properly when auto clear isn't in use")
Cc: stable@vger.kernel.org
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
(cherry picked from commit 9f9666e65359d5047089aef97ac87c50f624ecb0)
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
---
drivers/thunderbolt/nhi.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/thunderbolt/nhi.c b/drivers/thunderbolt/nhi.c
index 0a525f44ea31..4a6a3802d7e5 100644
--- a/drivers/thunderbolt/nhi.c
+++ b/drivers/thunderbolt/nhi.c
@@ -56,9 +56,14 @@ static int ring_interrupt_index(const struct tb_ring *ring)
static void nhi_mask_interrupt(struct tb_nhi *nhi, int mask, int ring)
{
- if (nhi->quirks & QUIRK_AUTO_CLEAR_INT)
- return;
- iowrite32(mask, nhi->iobase + REG_RING_INTERRUPT_MASK_CLEAR_BASE + ring);
+ if (nhi->quirks & QUIRK_AUTO_CLEAR_INT) {
+ u32 val;
+
+ val = ioread32(nhi->iobase + REG_RING_INTERRUPT_BASE + ring);
+ iowrite32(val & ~mask, nhi->iobase + REG_RING_INTERRUPT_BASE + ring);
+ } else {
+ iowrite32(mask, nhi->iobase + REG_RING_INTERRUPT_MASK_CLEAR_BASE + ring);
+ }
}
static void nhi_clear_interrupt(struct tb_nhi *nhi, int ring)