lkml.org 
[lkml]   [2024]   [May]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH RESEND] soc: xilinx: rename cpu_number1 to dummy_cpu_number
Date
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: daed80ed0758 ("soc: xilinx: Fix for call trace due to the usage of smp_processor_id()")
Signed-off-by: Jay Buddhabhatti <jay.buddhabhatti@amd.com>
---
drivers/soc/xilinx/xlnx_event_manager.c | 15 ++++-----------
1 file changed, 4 insertions(+), 11 deletions(-)

diff --git a/drivers/soc/xilinx/xlnx_event_manager.c b/drivers/soc/xilinx/xlnx_event_manager.c
index 253299e4214d..366018f6a0ee 100644
--- a/drivers/soc/xilinx/xlnx_event_manager.c
+++ b/drivers/soc/xilinx/xlnx_event_manager.c
@@ -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;
@@ -570,7 +571,6 @@ 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
@@ -607,11 +607,8 @@ 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) {
@@ -627,16 +624,12 @@ 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);
}

--
2.17.1

\
 
 \ /
  Last update: 2024-05-09 06:45    [W:0.051 / U:0.380 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site