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net: ipa: don't bother zeroing an already zero register

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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: Alex Elder <elder@linaro.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Alex Elder 2024-02-23 07:39:30 -06:00 committed by Paolo Abeni
parent 423df2e09d
commit f9345952e7
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ipa/ipa_interrupt.c
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@ -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);