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Commit 9594ca6b authored by Sebastian Ott's avatar Sebastian Ott Committed by Martin Schwidefsky
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s390/pci: remove bit_lock usage in interrupt handler 



The interrupt handler uses bit_spin_lock around a call to retrieve
per irq data (the irq number). However this per irq data is only
set during irq setup time and never changed until the irq is freed.

Thus it's safe to remove the lock usage.

Signed-off-by: default avatarSebastian Ott <sebott@linux.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 87ccdcfa

arch/s390/pci/pci.c

+1 −3
Original line number Diff line number Diff line
@@ -382,9 +382,7 @@ static void zpci_irq_handler(struct airq_struct *airq) 
			if (ai == -1UL)

				break;

			inc_irq_stat(IRQIO_MSI);

			airq_iv_lock(aibv, ai);

			generic_handle_irq(airq_iv_get_data(aibv, ai));

			airq_iv_unlock(aibv, ai);

		}

	}

}
@@ -410,7 +408,7 @@ int arch_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type) 
	zdev->aisb = aisb;



	/* Create adapter interrupt vector */

	zdev->aibv = airq_iv_create(msi_vecs, AIRQ_IV_DATA | AIRQ_IV_BITLOCK);

	zdev->aibv = airq_iv_create(msi_vecs, AIRQ_IV_DATA);

	if (!zdev->aibv)

		return -ENOMEM;