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mei: vsc: Call wake_up() in the threaded IRQ handler

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The hard IRQ handler vsc_tp_irq() is called with a raw spinlock taken.
wake_up() acquires a spinlock, a sleeping lock on PREEMPT_RT. This leads
to sleeping in atomic context.

Move the wake_up() call to the threaded IRQ handler vsc_tp_thread_isr()
where it can be safely called.

Fixes: 566f5ca976 ("mei: Add transport driver for IVSC device")
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Tested-and-Reviewed-by: Wentong Wu <wentong.wu@intel.com>
Link: https://lore.kernel.org/r/20240219195807.517742-2-sakari.ailus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sakari Ailus 2024-02-19 21:58:05 +02:00 committed by Greg Kroah-Hartman
parent e37db17dae
commit 058a38acba
1 changed files with 2 additions and 2 deletions
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4
drivers/misc/mei/vsc-tp.c
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@ -416,8 +416,6 @@ static irqreturn_t vsc_tp_isr(int irq, void *data)
atomic_inc(&tp->assert_cnt);
wake_up(&tp->xfer_wait);
return IRQ_WAKE_THREAD;
}
@ -425,6 +423,8 @@ static irqreturn_t vsc_tp_thread_isr(int irq, void *data)
{
struct vsc_tp *tp = data;
wake_up(&tp->xfer_wait);
if (tp->event_notify)
tp->event_notify(tp->event_notify_context);