net: ipa: retry TX channel stop commands

For RX channels we issue a stop command more than once if necessary
to allow it to stop.  It turns out that TX channels could also
require retries.

Retry channel stop commands if necessary regardless of the channel
direction.  Rename the symbol defining the retry count so it's not
RX-specific.
Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ipa/gsi.c

@@ -91,7 +91,7 @@
 
 #define GSI_CMD_TIMEOUT			50	/* milliseconds */
 
-#define GSI_CHANNEL_STOP_RX_RETRIES	10
+#define GSI_CHANNEL_STOP_RETRIES	10
 #define GSI_CHANNEL_MODEM_HALT_RETRIES	10
 
 #define GSI_MHI_EVENT_ID_START		10	/* 1st reserved event id */
@@ -889,14 +889,11 @@ 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];
-	u32 retries;
+	u32 retries = GSI_CHANNEL_STOP_RETRIES;
 	int ret;
 
 	gsi_channel_freeze(channel);
 
-	/* RX channels might require a little time to enter STOPPED state */
-	retries = channel->toward_ipa ? 0 : GSI_CHANNEL_STOP_RX_RETRIES;
-
 	mutex_lock(&gsi->mutex);
 
 	do {