Commit e70e410f authored by Alex Elder's avatar Alex Elder Committed by David S. Miller
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net: ipa: clear disabled IPA interrupt conditions 



We ignore any IPA interrupt that has no handler.  If any interrupt
conditions without a handler exist when an IPA interrupt occurs,
clear those conditions.  Add a debug message to report which ones
are being cleared.

Signed-off-by: default avatarAlex Elder <elder@linaro.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 937a0da4

drivers/net/ipa/ipa_interrupt.c

+14 −3
Original line number Diff line number Diff line
@@ -79,6 +79,7 @@ static void ipa_interrupt_process_all(struct ipa_interrupt *interrupt) 
{

	struct ipa *ipa = interrupt->ipa;

	u32 enabled = interrupt->enabled;

	u32 pending;

	u32 offset;

	u32 mask;
@@ -87,8 +88,8 @@ static void ipa_interrupt_process_all(struct ipa_interrupt *interrupt) 
	 * only the enabled ones.

	 */

	offset = ipa_reg_irq_stts_offset(ipa->version);

	mask = ioread32(ipa->reg_virt + offset);

	while ((mask &= enabled)) {

	pending = ioread32(ipa->reg_virt + offset);

	while ((mask = pending & enabled)) {

		do {

			u32 irq_id = __ffs(mask);
@@ -96,7 +97,17 @@ static void ipa_interrupt_process_all(struct ipa_interrupt *interrupt) 


			ipa_interrupt_process(interrupt, irq_id);

		} while (mask);

		mask = ioread32(ipa->reg_virt + offset);

		pending = ioread32(ipa->reg_virt + offset);

	}



	/* If any disabled interrupts are pending, clear them */

	if (pending) {

		struct device *dev = &ipa->pdev->dev;



		dev_dbg(dev, "clearing disabled IPA interrupts 0x%08x\n",

			pending);

		offset = ipa_reg_irq_clr_offset(ipa->version);

		iowrite32(pending, ipa->reg_virt + offset);

	}

}