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soc: xilinx: rename cpu_number1 to dummy_cpu_number

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[ Upstream commit 4a95449dd9 ]

The per cpu variable cpu_number1 is passed to xlnx_event_handler as
argument "dev_id", but it is not used in this function. So drop the
initialization of this variable and rename it to dummy_cpu_number.
This patch is to fix the following call trace when the kernel option
CONFIG_DEBUG_ATOMIC_SLEEP is enabled:

BUG: sleeping function called from invalid context at include/linux/sched/mm.h:274
    in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 1, name: swapper/0
    preempt_count: 1, expected: 0
    CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.1.0 #53
    Hardware name: Xilinx Versal vmk180 Eval board rev1.1 (QSPI) (DT)
    Call trace:
     dump_backtrace+0xd0/0xe0
     show_stack+0x18/0x40
     dump_stack_lvl+0x7c/0xa0
     dump_stack+0x18/0x34
     __might_resched+0x10c/0x140
     __might_sleep+0x4c/0xa0
     __kmem_cache_alloc_node+0xf4/0x168
     kmalloc_trace+0x28/0x38
     __request_percpu_irq+0x74/0x138
     xlnx_event_manager_probe+0xf8/0x298
     platform_probe+0x68/0xd8

Fixes: daed80ed07 ("soc: xilinx: Fix for call trace due to the usage of smp_processor_id()")
Signed-off-by: Jay Buddhabhatti <jay.buddhabhatti@amd.com>
Link: https://lore.kernel.org/r/20240408110610.15676-1-jay.buddhabhatti@amd.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jay Buddhabhatti 2024-04-08 04:06:10 -07:00 committed by Greg Kroah-Hartman
parent adc0b5c113
commit a96e60a6ea
1 changed files with 4 additions and 11 deletions
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15
drivers/soc/xilinx/xlnx_event_manager.c
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@ -3,6 +3,7 @@
* Xilinx Event Management Driver
*
* Copyright (C) 2021 Xilinx, Inc.
* Copyright (C) 2024 Advanced Micro Devices, Inc.
*
* Abhyuday Godhasara <abhyuday.godhasara@xilinx.com>
*/
@ -19,7 +20,7 @@
#include <linux/platform_device.h>
#include <linux/slab.h>
static DEFINE_PER_CPU_READ_MOSTLY(int, cpu_number1);
static DEFINE_PER_CPU_READ_MOSTLY(int, dummy_cpu_number);
static int virq_sgi;
static int event_manager_availability = -EACCES;
@ -555,7 +556,6 @@ static void xlnx_disable_percpu_irq(void *data)
static int xlnx_event_init_sgi(struct platform_device *pdev)
{
int ret = 0;
int cpu;
/*
* IRQ related structures are used for the following:
* for each SGI interrupt ensure its mapped by GIC IRQ domain
@ -592,11 +592,8 @@ static int xlnx_event_init_sgi(struct platform_device *pdev)
sgi_fwspec.param[0] = sgi_num;
virq_sgi = irq_create_fwspec_mapping(&sgi_fwspec);
cpu = get_cpu();
per_cpu(cpu_number1, cpu) = cpu;
ret = request_percpu_irq(virq_sgi, xlnx_event_handler, "xlnx_event_mgmt",
&cpu_number1);
put_cpu();
&dummy_cpu_number);
WARN_ON(ret);
if (ret) {
@ -612,16 +609,12 @@ static int xlnx_event_init_sgi(struct platform_device *pdev)
static void xlnx_event_cleanup_sgi(struct platform_device *pdev)
{
int cpu = smp_processor_id();
per_cpu(cpu_number1, cpu) = cpu;
cpuhp_remove_state(CPUHP_AP_ONLINE_DYN);
on_each_cpu(xlnx_disable_percpu_irq, NULL, 1);
irq_clear_status_flags(virq_sgi, IRQ_PER_CPU);
free_percpu_irq(virq_sgi, &cpu_number1);
free_percpu_irq(virq_sgi, &dummy_cpu_number);
irq_dispose_mapping(virq_sgi);
}