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net: ipa: introduce gsi_channel_stop_retry()

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Create a new helper function that encapsulates issuing a set of
channel stop commands, retrying if appropriate, with a short delay
between attempts.

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 11:28:45 -06:00 committed by Jakub Kicinski
parent 6b00a76a1d
commit 697e834e14
1 changed files with 15 additions and 5 deletions
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20
drivers/net/ipa/gsi.c
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@ -892,15 +892,12 @@ int gsi_channel_start(struct gsi *gsi, u32 channel_id)
return ret;
}
/* Stop a started channel */
int gsi_channel_stop(struct gsi *gsi, u32 channel_id)
static int gsi_channel_stop_retry(struct gsi_channel *channel)
{
struct gsi_channel *channel = &gsi->channel[channel_id];
u32 retries = GSI_CHANNEL_STOP_RETRIES;
struct gsi *gsi = channel->gsi;
int ret;
gsi_channel_freeze(channel);
mutex_lock(&gsi->mutex);
do {
@ -912,6 +909,19 @@ int gsi_channel_stop(struct gsi *gsi, u32 channel_id)
mutex_unlock(&gsi->mutex);
return ret;
}
/* Stop a started channel */
int gsi_channel_stop(struct gsi *gsi, u32 channel_id)
{
struct gsi_channel *channel = &gsi->channel[channel_id];
int ret;
gsi_channel_freeze(channel);
ret = gsi_channel_stop_retry(channel);
/* Re-thaw the channel if an error occurred while stopping */
if (ret)
gsi_channel_thaw(channel);