usb: host: xhci: fix ep context print mismatch in debugfs

commit 0077b1b2c8d9ad5f7a08b62fb8524cdb9938388f upstream.

dci is 0 based and xhci_get_ep_ctx() will do ep index increment to get
the ep context.

[rename dci to ep_index -Mathias]
Cc: stable <stable@vger.kernel.org> # v4.15+
Fixes: 02b6fdc2a153 ("usb: xhci: Add debugfs interface for xHCI driver")
Signed-off-by: Li Jun <jun.li@nxp.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20200821091549.20556-2-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/xhci-debugfs.c b/drivers/usb/host/xhci-debugfs.c
index 76c3f29562d2b9d2e3263f3d3dc1b45b92728140..448d7b11dec4cab8987d4fe2999af8e65e2f3249 100644 (file)
--- a/drivers/usb/host/xhci-debugfs.c
+++ b/drivers/usb/host/xhci-debugfs.c
@@ -273,7 +273,7 @@ static int xhci_slot_context_show(struct seq_file *s, void *unused)
 
 static int xhci_endpoint_context_show(struct seq_file *s, void *unused)
 {
-       int                     dci;
+       int                     ep_index;
        dma_addr_t              dma;
        struct xhci_hcd         *xhci;
        struct xhci_ep_ctx      *ep_ctx;
@@ -282,9 +282,9 @@ static int xhci_endpoint_context_show(struct seq_file *s, void *unused)
 
        xhci = hcd_to_xhci(bus_to_hcd(dev->udev->bus));
 
-       for (dci = 1; dci < 32; dci++) {
-               ep_ctx = xhci_get_ep_ctx(xhci, dev->out_ctx, dci);
-               dma = dev->out_ctx->dma + dci * CTX_SIZE(xhci->hcc_params);
+       for (ep_index = 0; ep_index < 31; ep_index++) {
+               ep_ctx = xhci_get_ep_ctx(xhci, dev->out_ctx, ep_index);
+               dma = dev->out_ctx->dma + (ep_index + 1) * CTX_SIZE(xhci->hcc_params);
                seq_printf(s, "%pad: %s\n", &dma,
                           xhci_decode_ep_context(le32_to_cpu(ep_ctx->ep_info),
                                                  le32_to_cpu(ep_ctx->ep_info2),