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[net-next,03/11] net: ipa: support more versions for HOLB timer

Message ID 20201116233805.13775-4-elder@linaro.org
State New
Headers show
Series net: ipa: IPA register cleanup | expand

Commit Message

Alex Elder Nov. 16, 2020, 11:37 p.m. UTC 
IPA version 3.5.1 represents the timer used in avoiding head-of-line
blocking with a simple tick count.  IPA v4.2 changes that, instead
splitting the timer field into two parts (base and scale) to
represent the ticks in the timer period.

IPA v4.0 and IPA v4.1 use the same method as IPA v3.5.1.  Change the
test in ipa_reg_init_hol_block_timer_val() so the result is correct
for those versions as well.

Signed-off-by: Alex Elder <elder@linaro.org>

---
 drivers/net/ipa/ipa_endpoint.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

-- 
2.20.1
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Patch

diff --git a/drivers/net/ipa/ipa_endpoint.c b/drivers/net/ipa/ipa_endpoint.c
index 548121b1531b7..3c9bbe2bf81c9 100644
--- a/drivers/net/ipa/ipa_endpoint.c
+++ b/drivers/net/ipa/ipa_endpoint.c
@@ -665,8 +665,8 @@  static u32 ipa_reg_init_hol_block_timer_val(struct ipa *ipa, u32 microseconds)
 	/* ...but we still need to fit into a 32-bit register */
 	WARN_ON(ticks > U32_MAX);
 
-	/* IPA v3.5.1 just records the tick count */
-	if (ipa->version == IPA_VERSION_3_5_1)
+	/* IPA v3.5.1 through v4.1 just record the tick count */
+	if (ipa->version < IPA_VERSION_4_2)
 		return (u32)ticks;
 
 	/* For IPA v4.2, the tick count is represented by base and