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dmaengine: idxd: clear misc interrupt cause after read

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Move the clearing of misc interrupt cause to immediately after reading the
register in order to allow the next interrupt to be asserted.

Suggested-by: Nikhil Rao <nikhil.rao@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/159603824665.28647.5344356370364397996.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Dave Jiang
2020-07-29 08:57:26 -07:00
committed by Vinod Koul
parent d1134d6619
commit 0ec083e50c
1 changed files with 1 additions and 1 deletions
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2
drivers/dma/idxd/irq.c
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@@ -76,6 +76,7 @@ irqreturn_t idxd_misc_thread(int vec, void *data)
bool err = false;
cause = ioread32(idxd->reg_base + IDXD_INTCAUSE_OFFSET);
iowrite32(cause, idxd->reg_base + IDXD_INTCAUSE_OFFSET);
if (cause & IDXD_INTC_ERR) {
spin_lock_bh(&idxd->dev_lock);
@@ -133,7 +134,6 @@ irqreturn_t idxd_misc_thread(int vec, void *data)
dev_warn_once(dev, "Unexpected interrupt cause bits set: %#x\n",
val);
iowrite32(cause, idxd->reg_base + IDXD_INTCAUSE_OFFSET);
if (!err)
goto out;