6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jay Buddhabhatti <jay.buddhabhatti@xxxxxxx>
[ Upstream commit 4a95449dd975e2ea6629a034f3e74b46c9634916 ]
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@xxxxxxx>
Link: https://lore.kernel.org/r/20240408110610.15676-1-jay.buddhabhatti@xxxxxxx
Signed-off-by: Michal Simek <michal.simek@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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 042553abe1bf8..098a2ecfd5c68 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@xxxxxxxxxx>
*/
@@ -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);
}
--
2.43.0
