From fd167f7a4a6079c14a0c940e9103495b171279fb Mon Sep 17 00:00:00 2001 From: Jett Rink Date: Fri, 10 Apr 2020 10:23:05 -0600 Subject: platform/chrome: cros_ec_ishtp: free ishtp buffer before sending event Recycle the ISH buffer before notifying of a response or an event. Often a new message is sent in response to an event and in high traffic scenarios this can lead to exhausting all available buffers. We can ensure we are using the fewest buffers possible by freeing buffers as soon as they are used. Signed-off-by: Jett Rink Signed-off-by: Mathew King Signed-off-by: Enric Balletbo i Serra --- drivers/platform/chrome/cros_ec_ishtp.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) (limited to 'drivers/platform/chrome') diff --git a/drivers/platform/chrome/cros_ec_ishtp.c b/drivers/platform/chrome/cros_ec_ishtp.c index e673a7f738fc..ed794a7ddba9 100644 --- a/drivers/platform/chrome/cros_ec_ishtp.c +++ b/drivers/platform/chrome/cros_ec_ishtp.c @@ -303,6 +303,10 @@ static void process_recv(struct ishtp_cl *cros_ish_cl, rb_in_proc->buffer.data, data_len); error_wake_up: + /* Free the buffer since we copied data or didn't need it */ + ishtp_cl_io_rb_recycle(rb_in_proc); + rb_in_proc = NULL; + /* Set flag before waking up the caller */ client_data->response.received = true; @@ -312,12 +316,14 @@ error_wake_up: break; case CROS_MKBP_EVENT: + /* Free the buffer. This is just an event without data */ + ishtp_cl_io_rb_recycle(rb_in_proc); + rb_in_proc = NULL; /* * Set timestamp from beginning of function since we actually * got an incoming MKBP event */ client_data->ec_dev->last_event_time = timestamp; - /* The event system doesn't send any data in buffer */ schedule_work(&client_data->work_ec_evt); break; @@ -327,8 +333,9 @@ error_wake_up: } end_error: - /* Free the buffer */ - ishtp_cl_io_rb_recycle(rb_in_proc); + /* Free the buffer if we already haven't */ + if (rb_in_proc) + ishtp_cl_io_rb_recycle(rb_in_proc); up_read(&init_lock); } -- cgit