renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2025-01-11 07:04:04 +08:00
Code

net: ipa: disable interrupt and NAPI after channel stop

Browse Source 
Disable both the I/O completion interrupt and NAPI polling on a
channel *after* we successfully stop it rather than before.  This
ensures a completion occurring just before the channel is stopped
gets processed.

Enable NAPI polling and the interrupt *before* starting a channel
rather than after, to be symmetric.  A stopped channel won't
generate any completion interrupts anyway.

Enable NAPI before the interrupt and disable it afterward.

Signed-off-by: Alex Elder <elder@linaro.org>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Alex Elder 2021-02-01 11:28:48 -06:00 committed by Jakub Kicinski
parent bd1ea1e464
commit 4fef691c9b
1 changed files with 9 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
drivers/net/ipa/gsi.c
View File

@ -860,15 +860,18 @@ static int __gsi_channel_start(struct gsi_channel *channel, bool start)
struct gsi *gsi = channel->gsi; struct gsi *gsi = channel->gsi;
int ret; int ret;
napi_enable(&channel->napi);
gsi_irq_ieob_enable_one(gsi, channel->evt_ring_id);
mutex_lock(&gsi->mutex); mutex_lock(&gsi->mutex);
ret = start ? gsi_channel_start_command(channel) : 0; ret = start ? gsi_channel_start_command(channel) : 0;
mutex_unlock(&gsi->mutex); mutex_unlock(&gsi->mutex);
if (!ret) { if (ret) {
gsi_irq_ieob_enable_one(gsi, channel->evt_ring_id); gsi_irq_ieob_disable_one(gsi, channel->evt_ring_id);
napi_enable(&channel->napi); napi_disable(&channel->napi);
} }
return ret; return ret;
@ -908,14 +911,11 @@ static int __gsi_channel_stop(struct gsi_channel *channel, bool stop)
int ret; int ret;
gsi_channel_trans_quiesce(channel); gsi_channel_trans_quiesce(channel);
napi_disable(&channel->napi);
gsi_irq_ieob_disable_one(gsi, channel->evt_ring_id);
ret = stop ? gsi_channel_stop_retry(channel) : 0; ret = stop ? gsi_channel_stop_retry(channel) : 0;
if (!ret) {
if (ret) { gsi_irq_ieob_disable_one(gsi, channel->evt_ring_id);
gsi_irq_ieob_enable_one(gsi, channel->evt_ring_id); napi_disable(&channel->napi);
napi_enable(&channel->napi);
} }
return ret; return ret;