[PATCH 04/17] irqchip/irq-mvebu-icu: fix wrong user data retrieval

Miquel Raynal
2018-04-21T13:55:24Z

The irq_domain structure has an host_data pointer that just stores user
data. It is meant to not be touched by the IRQ core. However, when it
comes to MSI, the MSI layer adds its own private data there with a
structure that also has a host_data pointer.

Because this IRQ domain is an MSI domain, to access user data we should
do a d->host_data->host_data, also wrapped as
'platform_msi_get_host_data()'.

This bug was lying there silently because the 'icu' structure retrieved
this way was just called by dev_err(), only producing a
'(NULL device *):' output on the console.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
---
drivers/irqchip/irq-mvebu-icu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-mvebu-icu.c b/drivers/irqchip/irq-mvebu-icu.c
index e18c48d3a92e..6a77b9ea8e41 100644
--- a/drivers/irqchip/irq-mvebu-icu.c
+++ b/drivers/irqchip/irq-mvebu-icu.c
@@ -92,7 +92,7 @@ static int
mvebu_icu_irq_domain_translate(struct irq_domain *d, struct irq_fwspec *fwspec,
unsigned long *hwirq, unsigned int *type)
{
- struct mvebu_icu *icu = d->host_data;
+ struct mvebu_icu *icu = platform_msi_get_host_data(d);
unsigned int icu_group;

/* Check the count of the parameters in dt */
--
2.14.1