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um: chan_kern: use raw spinlock for irqs_to_free_lock

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Since this is called deep in the ARCH=um IRQ infrastructure
it must use a raw spinlock. It's not really part of the
driver, but rather the core UML IRQ code.

Link: https://patch.msgid.link/20250505103358.ae7dc659f8b4.I64ca7aece30e0b4b0b5b35ad89cdd63db197c0ce@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg
2025-05-05 10:33:59 +02:00
parent bb13e79cc9
commit 10eabeca45
1 changed files with 5 additions and 5 deletions
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10
arch/um/drivers/chan_kern.c
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@@ -212,7 +212,7 @@ int enable_chan(struct line *line)
* be permanently disabled. This is discovered in IRQ context, but
* the freeing of the IRQ must be done later.
*/
static DEFINE_SPINLOCK(irqs_to_free_lock);
static DEFINE_RAW_SPINLOCK(irqs_to_free_lock);
static LIST_HEAD(irqs_to_free);
void free_irqs(void)
@@ -222,9 +222,9 @@ void free_irqs(void)
struct list_head *ele;
unsigned long flags;
spin_lock_irqsave(&irqs_to_free_lock, flags);
raw_spin_lock_irqsave(&irqs_to_free_lock, flags);
list_splice_init(&irqs_to_free, &list);
spin_unlock_irqrestore(&irqs_to_free_lock, flags);
raw_spin_unlock_irqrestore(&irqs_to_free_lock, flags);
list_for_each(ele, &list) {
chan = list_entry(ele, struct chan, free_list);
@@ -246,9 +246,9 @@ static void close_one_chan(struct chan *chan, int delay_free_irq)
return;
if (delay_free_irq) {
spin_lock_irqsave(&irqs_to_free_lock, flags);
raw_spin_lock_irqsave(&irqs_to_free_lock, flags);
list_add(&chan->free_list, &irqs_to_free);
spin_unlock_irqrestore(&irqs_to_free_lock, flags);
raw_spin_unlock_irqrestore(&irqs_to_free_lock, flags);
} else {
if (chan->input && chan->enabled)
um_free_irq(chan->line->read_irq, chan);