diff options
| author | Douglas Anderson <dianders@chromium.org> | 2016-01-28 18:20:07 -0800 |
|---|---|---|
| committer | Felipe Balbi <balbi@kernel.org> | 2016-03-04 15:14:44 +0200 |
| commit | 483bb2544c470aebdcc41199c0b145d05058a3bd (patch) | |
| tree | 0d8ad5f44089cb0fb7e7a1abd1737906e49198f0 /drivers/usb/dwc2/hcd_intr.c | |
| parent | 2d3f139810cd5d491d8dc8c3332c9d32b9b8e1f1 (diff) | |
| download | linux-483bb2544c470aebdcc41199c0b145d05058a3bd.tar.bz2 | |
usb: dwc2: host: Add scheduler logging for missed SOFs
We'll use the new "scheduler verbose debugging" macro to log missed
SOFs. This is fast enough (assuming you configure it to use the ftrace
buffer) that we can do it without worrying about the speed hit. The
overhead hit if the scheduler tracing is set to "no_printk" should be
near zero.
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Diffstat (limited to 'drivers/usb/dwc2/hcd_intr.c')
| -rw-r--r-- | drivers/usb/dwc2/hcd_intr.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/usb/dwc2/hcd_intr.c b/drivers/usb/dwc2/hcd_intr.c index 97aa6ca3a12e..5fc024f2092a 100644 --- a/drivers/usb/dwc2/hcd_intr.c +++ b/drivers/usb/dwc2/hcd_intr.c @@ -55,12 +55,16 @@ /* This function is for debug only */ static void dwc2_track_missed_sofs(struct dwc2_hsotg *hsotg) { -#ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS u16 curr_frame_number = hsotg->frame_number; + u16 expected = dwc2_frame_num_inc(hsotg->last_frame_num, 1); + + if (expected != curr_frame_number) + dwc2_sch_vdbg(hsotg, "MISSED SOF %04x != %04x\n", + expected, curr_frame_number); +#ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS if (hsotg->frame_num_idx < FRAME_NUM_ARRAY_SIZE) { - if (((hsotg->last_frame_num + 1) & HFNUM_MAX_FRNUM) != - curr_frame_number) { + if (expected != curr_frame_number) { hsotg->frame_num_array[hsotg->frame_num_idx] = curr_frame_number; hsotg->last_frame_num_array[hsotg->frame_num_idx] = @@ -79,8 +83,8 @@ static void dwc2_track_missed_sofs(struct dwc2_hsotg *hsotg) } hsotg->dumped_frame_num_array = 1; } - hsotg->last_frame_num = curr_frame_number; #endif + hsotg->last_frame_num = curr_frame_number; } static void dwc2_hc_handle_tt_clear(struct dwc2_hsotg *hsotg, |