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| author |   Samuel Holland <samuel.holland@sifive.com> | 2024-11-14 12:01:30 -0800 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2024-11-16 00:45:37 +0100 |
| commit | 1f181d1cda56c2fbe379c5ace1aa1fac6306669e (patch) | |
| tree | c48eb258edbf654b78c7cca34905b45b780532b8 /drivers/irqchip/irq-riscv-aplic-msi.c | |
| parent | genirq/proc: Use seq_put_decimal_ull_width() for decimal values (diff) | |
| download | wireguard-linux-1f181d1cda56c2fbe379c5ace1aa1fac6306669e.tar.xz wireguard-linux-1f181d1cda56c2fbe379c5ace1aa1fac6306669e.zip | |
irqchip/riscv-aplic: Prevent crash when MSI domain is missing
If the APLIC driver is probed before the IMSIC driver, the parent MSI
domain will be missing, which causes a NULL pointer dereference in
msi_create_device_irq_domain().
Avoid this by deferring probe until the parent MSI domain is available. Use
dev_err_probe() to avoid printing an error message when returning
-EPROBE_DEFER.
Fixes: ca8df97fe679 ("irqchip/riscv-aplic: Add support for MSI-mode")
Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20241114200133.3069460-1-samuel.holland@sifive.com
Diffstat (limited to '')
| -rw-r--r-- | drivers/irqchip/irq-riscv-aplic-msi.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-riscv-aplic-msi.c b/drivers/irqchip/irq-riscv-aplic-msi.c index 945bff28265c..fb8d1838609f 100644 --- a/drivers/irqchip/irq-riscv-aplic-msi.c +++ b/drivers/irqchip/irq-riscv-aplic-msi.c @@ -266,6 +266,9 @@ int aplic_msi_setup(struct device *dev, void __iomem *regs) if (msi_domain) dev_set_msi_domain(dev, msi_domain); } + + if (!dev_get_msi_domain(dev)) + return -EPROBE_DEFER; } if (!msi_create_device_irq_domain(dev, MSI_DEFAULT_DOMAIN, &aplic_msi_template, |