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net: ipa: HOLB register sometimes must be written twice 

Starting with IPA v4.5, the HOL_BLOCK_EN register must be written
twice when enabling head-of-line blocking avoidance.

Fixes: 84f9bd12d4 ("soc: qcom: ipa: IPA endpoints")
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alex Elder 2021-11-12 16:22:09 -06:00 committed by David S. Miller
parent 10a2308ffb
commit 6e228d8cbb
1 changed files with 3 additions and 0 deletions
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3
drivers/net/ipa/ipa_endpoint.c
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@ -868,6 +868,9 @@ ipa_endpoint_init_hol_block_enable(struct ipa_endpoint *endpoint, bool enable)
val = enable ? HOL_BLOCK_EN_FMASK : 0;
offset = IPA_REG_ENDP_INIT_HOL_BLOCK_EN_N_OFFSET(endpoint_id);
iowrite32(val, endpoint->ipa->reg_virt + offset);
/* When enabling, the register must be written twice for IPA v4.5+ */
if (enable && endpoint->ipa->version >= IPA_VERSION_4_5)
iowrite32(val, endpoint->ipa->reg_virt + offset);
}
void ipa_endpoint_modem_hol_block_clear_all(struct ipa *ipa)