diff options
| author | Alex Elder <elder@linaro.org> | 2020-06-30 15:44:42 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-06-30 23:10:57 +0300 |
| commit | 5468cbcddf47f674829c6ada190283108a63d7b5 (patch) | |
| tree | f33951b076bf46232b825b6d97e65a462135065b /drivers/net/ipa/gsi.c | |
| parent | f2ca673d2cd5df9a76247b670e9ffd4d63682b3f (diff) | |
| download | linux-5468cbcddf47f674829c6ada190283108a63d7b5.tar.xz | |
net: ipa: always check for stopped channel
In gsi_channel_stop(), there's a check to see if the channel might
have entered STOPPED state since a previous call, which might have
timed out before stopping completed.
That check actually belongs in gsi_channel_stop_command(), which is
called repeatedly by gsi_channel_stop() for RX channels.
Fixes: 650d1603825d ("soc: qcom: ipa: the generic software interface")
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ipa/gsi.c')
| -rw-r--r-- | drivers/net/ipa/gsi.c | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/drivers/net/ipa/gsi.c b/drivers/net/ipa/gsi.c index 55226b264e3c..ac7e5a04c8ac 100644 --- a/drivers/net/ipa/gsi.c +++ b/drivers/net/ipa/gsi.c @@ -500,6 +500,13 @@ static int gsi_channel_stop_command(struct gsi_channel *channel) int ret; state = gsi_channel_state(channel); + + /* Channel could have entered STOPPED state since last call + * if it timed out. If so, we're done. + */ + if (state == GSI_CHANNEL_STATE_STOPPED) + return 0; + if (state != GSI_CHANNEL_STATE_STARTED && state != GSI_CHANNEL_STATE_STOP_IN_PROC) return -EINVAL; @@ -789,20 +796,11 @@ int gsi_channel_start(struct gsi *gsi, u32 channel_id) int gsi_channel_stop(struct gsi *gsi, u32 channel_id) { struct gsi_channel *channel = &gsi->channel[channel_id]; - enum gsi_channel_state state; u32 retries; int ret; gsi_channel_freeze(channel); - /* Channel could have entered STOPPED state since last call if the - * STOP command timed out. We won't stop a channel if stopping it - * was successful previously (so we still want the freeze above). - */ - state = gsi_channel_state(channel); - if (state == GSI_CHANNEL_STATE_STOPPED) - return 0; - /* RX channels might require a little time to enter STOPPED state */ retries = channel->toward_ipa ? 0 : GSI_CHANNEL_STOP_RX_RETRIES; |