This is a note to let you know that I've just added the patch titled
bnxt: apply computed clamp value for coalece parameter
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
bnxt-apply-computed-clamp-value-for-coalece-parameter.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Wed 01 Jan 2020 10:35:31 PM CET
From: Jonathan Lemon <jonathan.lemon@xxxxxxxxx>
Date: Tue, 10 Dec 2019 08:39:46 -0800
Subject: bnxt: apply computed clamp value for coalece parameter
From: Jonathan Lemon <jonathan.lemon@xxxxxxxxx>
[ Upstream commit 6adc4601c2a1ac87b4ab8ed0cb55db6efd0264e8 ]
After executing "ethtool -C eth0 rx-usecs-irq 0", the box becomes
unresponsive, likely due to interrupt livelock. It appears that
a minimum clamp value for the irq timer is computed, but is never
applied.
Fix by applying the corrected clamp value.
Fixes: 74706afa712d ("bnxt_en: Update interrupt coalescing logic.")
Signed-off-by: Jonathan Lemon <jonathan.lemon@xxxxxxxxx>
Signed-off-by: Michael Chan <michael.chan@xxxxxxxxxxxx>
Signed-off-by: Jakub Kicinski <jakub.kicinski@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/broadcom/bnxt/bnxt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -6178,7 +6178,7 @@ static void bnxt_hwrm_set_coal_params(st
tmr = bnxt_usec_to_coal_tmr(bp, hw_coal->coal_ticks_irq);
val = clamp_t(u16, tmr, 1,
coal_cap->cmpl_aggr_dma_tmr_during_int_max);
- req->cmpl_aggr_dma_tmr_during_int = cpu_to_le16(tmr);
+ req->cmpl_aggr_dma_tmr_during_int = cpu_to_le16(val);
req->enables |=
cpu_to_le16(BNXT_COAL_CMPL_AGGR_TMR_DURING_INT_ENABLE);
}
Patches currently in stable-queue which might be from jonathan.lemon@xxxxxxxxx are
queue-5.4/bnxt-apply-computed-clamp-value-for-coalece-parameter.patch
