openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

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: Sebastian Ott <sebott@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott 2018-10-30 14:04:46 +01:00 committed by Martin Schwidefsky
parent 87ccdcfa9c
commit 9594ca6b87
1 changed files with 1 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/s390/pci/pci.c
View File

@ -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;