diff options
| author | Wang Kefeng <wangkefeng.wang@huawei.com> | 2021-08-23 12:41:43 +0300 |
|---|---|---|
| committer | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2021-10-19 12:30:53 +0300 |
| commit | 854f695c3d41853eb7efcd436023c5ab92a257eb (patch) | |
| tree | 9f85eb6f9ff706cecfc7678d971661fbd0bcf844 /drivers/of | |
| parent | eb4f756915875b0ea0757751cd29841f0504d547 (diff) | |
| download | linux-854f695c3d41853eb7efcd436023c5ab92a257eb.tar.xz | |
ARM: 9119/1: amba: Properly handle device probe without IRQ domain
of_amba_device_create() uses irq_of_parse_and_map() to translate
a DT interrupt specification into a Linux virtual interrupt number.
But it doesn't properly handle the case where the interrupt controller
is not yet available, eg, when pl011 interrupt is connected to MBIGEN
interrupt controller, because the mbigen initialization is too late,
which will lead to no IRQ due to no IRQ domain found, log is shown below,
"irq: no irq domain found for uart0 !"
use of_irq_get() to return -EPROBE_DEFER as above, and in the function
amba_device_try_add()/amba_device_add(), it will properly handle in such
case, also return 0 in other fail cases to be consistent as before.
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Frank Rowand <frowand.list@gmail.com>
Reported-by: Ruizhe Lin <linruizhe@huawei.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Diffstat (limited to 'drivers/of')
| -rw-r--r-- | drivers/of/platform.c | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/drivers/of/platform.c b/drivers/of/platform.c index 74afbb7a4f5e..32d5ff8df747 100644 --- a/drivers/of/platform.c +++ b/drivers/of/platform.c @@ -222,7 +222,7 @@ static struct amba_device *of_amba_device_create(struct device_node *node, { struct amba_device *dev; const void *prop; - int i, ret; + int ret; pr_debug("Creating amba device %pOF\n", node); @@ -253,10 +253,6 @@ static struct amba_device *of_amba_device_create(struct device_node *node, if (prop) dev->periphid = of_read_ulong(prop, 1); - /* Decode the IRQs and address ranges */ - for (i = 0; i < AMBA_NR_IRQS; i++) - dev->irq[i] = irq_of_parse_and_map(node, i); - ret = of_address_to_resource(node, 0, &dev->res); if (ret) { pr_err("amba: of_address_to_resource() failed (%d) for %pOF\n", |