linux-kernel - [PATCH 2/2] usb: dwc2: fix debugfs FIFO count

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Message-Id: <20191219113432.1229852-2-john@metanate.com>
Date:   Thu, 19 Dec 2019 11:34:32 +0000
From:   John Keeping <john@...anate.com>
To:     Minas Harutyunyan <hminas@...opsys.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-rockchip@...ts.infradead.org,
        John Keeping <john@...anate.com>
Subject: [PATCH 2/2] usb: dwc2: fix debugfs FIFO count

The number of FIFOs may be lower than the number of endpoints.  Use the
correct total when printing FIFO details in debugfs.

Signed-off-by: John Keeping <john@...anate.com>
---
 drivers/usb/dwc2/debugfs.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/dwc2/debugfs.c b/drivers/usb/dwc2/debugfs.c
index b8f2790abf91..3a0dcbfbc827 100644
--- a/drivers/usb/dwc2/debugfs.c
+++ b/drivers/usb/dwc2/debugfs.c
@@ -183,6 +183,7 @@ DEFINE_SHOW_ATTRIBUTE(state);
 static int fifo_show(struct seq_file *seq, void *v)
 {
 	struct dwc2_hsotg *hsotg = seq->private;
+	int fifo_count = dwc2_hsotg_tx_fifo_count(hsotg);
 	u32 val;
 	int idx;
 
@@ -196,7 +197,7 @@ static int fifo_show(struct seq_file *seq, void *v)
 
 	seq_puts(seq, "\nPeriodic TXFIFOs:\n");
 
-	for (idx = 1; idx < hsotg->num_of_eps; idx++) {
+	for (idx = 1; idx <= fifo_count; idx++) {
 		val = dwc2_readl(hsotg, DPTXFSIZN(idx));
 
 		seq_printf(seq, "\tDPTXFIFO%2d: Size %d, Start 0x%08x\n", idx,
-- 
2.24.1