Messages in this thread Patch in this message | | | From | cgel.zte@gmail ... | Subject | [PATCH] qedr: Remove unnecessary synchronize_irq() before free_irq() | Date | Fri, 13 May 2022 08:16:47 +0000 |
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From: Minghao Chi <chi.minghao@zte.com.cn>
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.
Reported-by: Zeal Robot <zealci@zte.com.cn> Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn> --- drivers/infiniband/hw/qedr/main.c | 1 - 1 file changed, 1 deletion(-)
diff --git a/drivers/infiniband/hw/qedr/main.c b/drivers/infiniband/hw/qedr/main.c index 65ce6d0f1885..5152f10d2e6d 100644 --- a/drivers/infiniband/hw/qedr/main.c +++ b/drivers/infiniband/hw/qedr/main.c @@ -500,7 +500,6 @@ static void qedr_sync_free_irqs(struct qedr_dev *dev) if (dev->int_info.msix_cnt) { idx = i * dev->num_hwfns + dev->affin_hwfn_idx; vector = dev->int_info.msix[idx].vector; - synchronize_irq(vector); free_irq(vector, &dev->cnq_array[i]); } } -- 2.25.1
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