linux-kernel - [tip: irq/urgent] irqchip/irq-mvebu-icu: Fix access to msi_data from irq_domain::host

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Message-ID: <173797283644.31546.7475280911630632901.tip-bot2@tip-bot2>
Date: Mon, 27 Jan 2025 10:13:56 -0000
From: "tip-bot2 for Stefan Eichenberger" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Stefan Eichenberger <eichest@...il.com>,
 Thomas Gleixner <tglx@...utronix.de>, stable@...r.kernel.org, x86@...nel.org,
 linux-kernel@...r.kernel.org, maz@...nel.org
Subject: [tip: irq/urgent] irqchip/irq-mvebu-icu: Fix access to msi_data from
 irq_domain::host_data

The following commit has been merged into the irq/urgent branch of tip:

Commit-ID:     987f379b54091cc1b1db986bde71cee1081350b3
Gitweb:        https://git.kernel.org/tip/987f379b54091cc1b1db986bde71cee1081350b3
Author:        Stefan Eichenberger <eichest@...il.com>
AuthorDate:    Fri, 24 Jan 2025 09:50:39 +01:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Mon, 27 Jan 2025 11:07:03 +01:00

irqchip/irq-mvebu-icu: Fix access to msi_data from irq_domain::host_data

mvebu_icu_translate() incorrectly casts irq_domain::host_data directly to
mvebu_icu_msi_data. However, host_data actually points to a structure of
type msi_domain_info.

This incorrect cast causes issues such as the thermal sensors of the
CP110 platform malfunctioning. Specifically, the translation of the SEI
interrupt to IRQ_TYPE_EDGE_RISING fails, preventing proper interrupt
handling. The following error was observed:

  genirq: Setting trigger mode 4 for irq 85 failed (irq_chip_set_type_parent+0x0/0x34)
  armada_thermal f2400000.system-controller:thermal-sensor@70: Cannot request threaded IRQ 85

Resolve the issue by first casting host_data to msi_domain_info and then
accessing mvebu_icu_msi_data through msi_domain_info::chip_data.

Fixes: d929e4db22b6 ("irqchip/irq-mvebu-icu: Prepare for real per device MSI")
Signed-off-by: Stefan Eichenberger <eichest@...il.com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: stable@...r.kernel.org
Link: https://lore.kernel.org/all/20250124085140.44792-1-eichest@gmail.com
---
 drivers/irqchip/irq-mvebu-icu.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-mvebu-icu.c b/drivers/irqchip/irq-mvebu-icu.c
index b337f6c..4eebed3 100644
--- a/drivers/irqchip/irq-mvebu-icu.c
+++ b/drivers/irqchip/irq-mvebu-icu.c
@@ -68,7 +68,8 @@ static int mvebu_icu_translate(struct irq_domain *d, struct irq_fwspec *fwspec,
 			       unsigned long *hwirq, unsigned int *type)
 {
 	unsigned int param_count = static_branch_unlikely(&legacy_bindings) ? 3 : 2;
-	struct mvebu_icu_msi_data *msi_data = d->host_data;
+	struct msi_domain_info *info = d->host_data;
+	struct mvebu_icu_msi_data *msi_data = info->chip_data;
 	struct mvebu_icu *icu = msi_data->icu;
 
 	/* Check the count of the parameters in dt */