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Code Issues Releases Wiki Activity

powerpc/vas: Fix IRQ name allocation

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The VAS device allocates a generic interrupt to handle page faults but
the IRQ name doesn't show under /proc. This is because it's on
stack. Allocate the name.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Acked-by: Haren Myneni <haren@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201212142707.2102141-1-clg@kaod.org
This commit is contained in:
Cédric Le Goater 2020-12-12 15:27:07 +01:00 committed by Michael Ellerman
parent 691602aab9
commit 9dd31b1137
2 changed files with 9 additions and 3 deletions
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11
arch/powerpc/platforms/powernv/vas.c
View file

@ -28,12 +28,10 @@ static DEFINE_PER_CPU(int, cpu_vas_id);
static int vas_irq_fault_window_setup(struct vas_instance *vinst)
{
char devname[64];
int rc = 0;
snprintf(devname, sizeof(devname), "vas-%d", vinst->vas_id);
rc = request_threaded_irq(vinst->virq, vas_fault_handler,
vas_fault_thread_fn, 0, devname, vinst);
vas_fault_thread_fn, 0, vinst->name, vinst);
if (rc) {
pr_err("VAS[%d]: Request IRQ(%d) failed with %d\n",
@ -80,6 +78,12 @@ static int init_vas_instance(struct platform_device *pdev)
if (!vinst)
return -ENOMEM;
vinst->name = kasprintf(GFP_KERNEL, "vas-%d", vasid);
if (!vinst->name) {
kfree(vinst);
return -ENOMEM;
}
INIT_LIST_HEAD(&vinst->node);
ida_init(&vinst->ida);
mutex_init(&vinst->mutex);
@ -162,6 +166,7 @@ static int init_vas_instance(struct platform_device *pdev)
return 0;
free_vinst:
kfree(vinst->name);
kfree(vinst);
return -ENODEV;

1
arch/powerpc/platforms/powernv/vas.h
View file

@ -340,6 +340,7 @@ struct vas_instance {
struct vas_window *rxwin[VAS_COP_TYPE_MAX];
struct vas_window *windows[VAS_WINDOWS_PER_CHIP];
char *name;
char *dbgname;
struct dentry *dbgdir;
};