Hi
I'm writing a new PCIe host controller driver for ARM32 platform and
it is with an external MSI controller. This msi driver uses the new
MSI domain framework.
But I got the error below. It is failed in
kernel/irq/msi.c:msi_domain_set_affinity(). The
"parent->chip->irq_set_affinity" is NULL.
"irq_chip" structure in my msi driver is defined as below. Do we
expect all MSI drivers need to provide .irq_set_affinity callback in
"irq_chip" structure?
Note, it is run on a SMP ARM32 processor.
My msi driver:
static struct irq_chip a msi_bottom_irq_chip = {
.name = "PCIe MSI",
.irq_compose_msi_msg = _compose_msi_msg,
};
In kernel/irq/msi.c:
int msi_domain_set_affinity(struct irq_data *irq_data,
const struct cpumask *mask, bool force)
{
struct irq_data *parent = irq_data->parent_data;
struct msi_msg msg;
int ret;
ret = parent->chip->irq_set_affinity(parent, mask, force);
if (ret >= 0 && ret != IRQ_SET_MASK_OK_DONE) {
BUG_ON(irq_chip_compose_msi_msg(irq_data, &msg));
irq_chip_write_msi_msg(irq_data, &msg);
}
return ret;
}
==============================================
Error log:
[ 59.581184] [<c00659c0>] (msi_domain_set_affinity) from
[<c005f3f8>] (irq_do_set_affinity+0x34/0x64)
[ 59.590280] [<c005f3f8>] (irq_do_set_affinity) from [<c005f4a0>]
(setup_affinity+0x78/0xc8)
[ 59.598597] [<c005f4a0>] (setup_affinity) from [<c005fc68>]
(__setup_irq+0x2c0/0x528)
[ 59.606397] [<c005fc68>] (__setup_irq) from [<c0060028>]
(request_threaded_irq+0xcc/0x14c)
[ 59.614636] [<c0060028>] (request_threaded_irq) from [<c0326d80>]
(e1000_request_irq+0x1b4/0x26c)
[ 59.623474] [<c0326d80>] (e1000_request_irq) from [<c032a8a4>]
(e1000_open+0xcc/0x3cc)
[ 59.631365] [<c032a8a4>] (e1000_open) from [<c03ca464>]
(__dev_open+0xa8/0x10c)
[ 59.638647] [<c03ca464>] (__dev_open) from [<c03ca6ec>]
(__dev_change_flags+0x94/0x158)
[ 59.646617] [<c03ca6ec>] (__dev_change_flags) from [<c03ca7c8>]
(dev_change_flags+0x18/0x48)
[ 59.655028] [<c03ca7c8>] (dev_change_flags) from [<c0425c74>]
(devinet_ioctl+0x690/0x764)
[ 59.663177] [<c0425c74>] (devinet_ioctl) from [<c03ae440>]
(sock_ioctl+0x1c0/0x28c)
[ 59.670808] [<c03ae440>] (sock_ioctl) from [<c010c1a8>]
(do_vfs_ioctl+0x420/0x610)
[ 59.678346] [<c010c1a8>] (do_vfs_ioctl) from [<c010c3cc>]
(SyS_ioctl+0x34/0x5c)
[ 59.685632] [<c010c3cc>] (SyS_ioctl) from [<c000efc0>]
(ret_fast_syscall+0x0/0x3c)
Thanks.
Regards
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