[PATCH resend 1/2] be2iscsi: Remove unnecessary synchronize_irq() before free_irq()

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Calling synchronize_irq() right before free_irq() is quite useless. On one
hand the IRQ can easily fire again before free_irq() is entered, on the
other hand free_irq() itself calls synchronize_irq() internally (in a race
condition free way), before any state associated with the IRQ is freed.

Patch was generated using the following semantic patch:
// <smpl>
@@
expression irq;
@@
-synchronize_irq(irq);
 free_irq(irq, ...);
// </smpl>

Signed-off-by: Lars-Peter Clausen <lars@xxxxxxxxxx>
---
 drivers/scsi/be2iscsi/be_main.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/scsi/be2iscsi/be_main.c b/drivers/scsi/be2iscsi/be_main.c
index b51e726..e89a0f8d 100644
--- a/drivers/scsi/be2iscsi/be_main.c
+++ b/drivers/scsi/be2iscsi/be_main.c
@@ -5303,15 +5303,12 @@ static void beiscsi_quiesce(struct beiscsi_hba *phba,
 	if (phba->msix_enabled) {
 		for (i = 0; i <= phba->num_cpus; i++) {
 			msix_vec = phba->msix_entries[i].vector;
-			synchronize_irq(msix_vec);
 			free_irq(msix_vec, &phwi_context->be_eq[i]);
 			kfree(phba->msi_name[i]);
 		}
 	} else
-		if (phba->pcidev->irq) {
-			synchronize_irq(phba->pcidev->irq);
+		if (phba->pcidev->irq)
 			free_irq(phba->pcidev->irq, phba);
-		}
 	pci_disable_msix(phba->pcidev);
 	cancel_delayed_work_sync(&phba->beiscsi_hw_check_task);
 
-- 
2.1.4

--
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [SCSI Target Devel]     [Linux SCSI Target Infrastructure]     [Kernel Newbies]     [IDE]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux ATA RAID]     [Linux IIO]     [Samba]     [Device Mapper]
  Powered by Linux