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powerpc, ocxl: Fix extraction of struct xive_irq_data 

Commit cc0cc23bab ("powerpc/xive: Untangle xive from child interrupt
controller drivers") changed xive_irq_data to be stashed to chip_data
instead of handler_data. However, multiple places are still attempting to
read xive_irq_data from handler_data and get a NULL pointer deference bug.

Update them to read xive_irq_data from chip_data.

Non-XIVE files which touch xive_irq_data seem quite strange to me,
especially the ocxl driver. I think there ought to be an alternative
platform-independent solution, instead of touching XIVE's data directly.
Therefore, I think this whole thing should be cleaned up. But perhaps I
just misunderstand something. In any case, this cleanup would not be
trivial; for now, just get things working again.

Fixes: cc0cc23bab ("powerpc/xive: Untangle xive from child interrupt controller drivers")
Reported-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Closes: https://lore.kernel.org/linuxppc-dev/68e48df8.170a0220.4b4b0.217d@mx.google.com/
Signed-off-by: Nam Cao <namcao@linutronix.de>
Reviewed-by: Ganesh Goudar <ganeshgr@linux.ibm.com>
Acked-by: Andrew Donnellan <ajd@linux.ibm.com>  # ocxl
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20251008081359.1382699-1-namcao@linutronix.de
This commit is contained in:
Nam Cao 2025-10-08 08:13:59 +00:00 committed by Madhavan Srinivasan
parent ef3e73a917
commit 2743cf75f7
4 changed files with 7 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
arch/powerpc/kvm/book3s_xive.c
View File

@ -916,8 +916,7 @@ int kvmppc_xive_attach_escalation(struct kvm_vcpu *vcpu, u8 prio,
* it fires once.
*/
if (single_escalation) {
struct irq_data *d = irq_get_irq_data(xc->esc_virq[prio]);
struct xive_irq_data *xd = irq_data_get_irq_handler_data(d);
struct xive_irq_data *xd = irq_get_chip_data(xc->esc_virq[prio]);
xive_vm_esb_load(xd, XIVE_ESB_SET_PQ_01);
vcpu->arch.xive_esc_raddr = xd->eoi_page;
@ -1612,7 +1611,7 @@ int kvmppc_xive_set_mapped(struct kvm *kvm, unsigned long guest_irq,
/* Grab info about irq */
state->pt_number = hw_irq;
state->pt_data = irq_data_get_irq_handler_data(host_data);
state->pt_data = irq_data_get_irq_chip_data(host_data);
/*
* Configure the IRQ to match the existing configuration of
@ -1787,8 +1786,7 @@ void kvmppc_xive_disable_vcpu_interrupts(struct kvm_vcpu *vcpu)
*/
void xive_cleanup_single_escalation(struct kvm_vcpu *vcpu, int irq)
{
struct irq_data *d = irq_get_irq_data(irq);
struct xive_irq_data *xd = irq_data_get_irq_handler_data(d);
struct xive_irq_data *xd = irq_get_chip_data(irq);
/*
* This slightly odd sequence gives the right result
@ -2827,9 +2825,7 @@ int kvmppc_xive_debug_show_queues(struct seq_file *m, struct kvm_vcpu *vcpu)
i0, i1);
}
if (xc->esc_virq[i]) {
struct irq_data *d = irq_get_irq_data(xc->esc_virq[i]);
struct xive_irq_data *xd =
irq_data_get_irq_handler_data(d);
struct xive_irq_data *xd = irq_get_chip_data(xc->esc_virq[i]);
u64 pq = xive_vm_esb_load(xd, XIVE_ESB_GET);
seq_printf(m, " ESC %d %c%c EOI @%llx",

2
arch/powerpc/platforms/powernv/vas.c
View File

@ -121,7 +121,7 @@ static int init_vas_instance(struct platform_device *pdev)
return -EINVAL;
}
xd = irq_get_handler_data(vinst->virq);
xd = irq_get_chip_data(vinst->virq);
if (!xd) {
pr_err("Inst%d: Invalid virq %d\n",
vinst->vas_id, vinst->virq);

2
arch/powerpc/sysdev/xive/common.c
View File

@ -1580,7 +1580,7 @@ static void xive_flush_cpu_queue(unsigned int cpu, struct xive_cpu *xc)
cpu, irq);
#endif
raw_spin_lock(&desc->lock);
xd = irq_desc_get_handler_data(desc);
xd = irq_desc_get_chip_data(desc);
/*
* Clear saved_p to indicate that it's no longer pending

2
drivers/misc/ocxl/afu_irq.c
View File

@ -203,7 +203,7 @@ u64 ocxl_afu_irq_get_addr(struct ocxl_context *ctx, int irq_id)
mutex_lock(&ctx->irq_lock);
irq = idr_find(&ctx->irq_idr, irq_id);
if (irq) {
xd = irq_get_handler_data(irq->virq);
xd = irq_get_chip_data(irq->virq);
addr = xd ? xd->trig_page : 0;
}
mutex_unlock(&ctx->irq_lock);