Commit f9345952 authored by Alex Elder's avatar Alex Elder Committed by Paolo Abeni
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net: ipa: don't bother zeroing an already zero register 



In ipa_interrupt_suspend_clear_all(), if the SUSPEND_INFO register
read contains no set bits, there's no interrupt condition to clear.
Skip the write to the clear register in that case.

Signed-off-by: default avatarAlex Elder <elder@linaro.org>
Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
parent 423df2e0

drivers/net/ipa/ipa_interrupt.c

+1 −1
Original line number Diff line number Diff line
@@ -59,7 +59,7 @@ static void ipa_interrupt_suspend_clear_all(struct ipa_interrupt *interrupt) 
		val = ioread32(ipa->reg_virt + reg_n_offset(reg, unit));



		/* SUSPEND interrupt status isn't cleared on IPA version 3.0 */

		if (ipa->version == IPA_VERSION_3_0)

		if (!val || ipa->version == IPA_VERSION_3_0)

			continue;



		reg = ipa_reg(ipa, IRQ_SUSPEND_CLR);