@@ -3015,12 +3015,11 @@ irqreturn_t xhci_irq(struct usb_hcd *hcd)
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
union xhci_trb *event_ring_deq;
irqreturn_t ret = IRQ_NONE;
- unsigned long flags;
u64 temp_64;
u32 status;
int event_loop = 0;
- spin_lock_irqsave(&xhci->lock, flags);
+ spin_lock(&xhci->lock);
/* Check if the xHC generated the interrupt, or the irq is shared */
status = readl(&xhci->op_regs->status);
if (status == ~(u32)0) {
@@ -3083,7 +3082,7 @@ irqreturn_t xhci_irq(struct usb_hcd *hcd)
ret = IRQ_HANDLED;
out:
- spin_unlock_irqrestore(&xhci->lock, flags);
+ spin_unlock(&xhci->lock);
return ret;
}
Force-threaded interrupt handlers used to run with interrupts enabled, something which could lead to deadlocks in case a threaded handler shared a lock with code running in hard interrupt context (e.g. timer callbacks) and did not explicitly disable interrupts. Since commit 81e2073c175b ("genirq: Disable interrupts for force threaded handlers") interrupt handlers always run with interrupts disabled on non-RT so that drivers no longer need to do handle forced threading ("threadirqs"). Drop the now obsolete workaround added by commit 63aea0dbab90 ("USB: xhci: fix lock-inversion problem"). Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Bart Van Assche <bart.vanassche@sandisk.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Johan Hovold <johan@kernel.org> --- drivers/usb/host/xhci-ring.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)