xhci: Expose segment numbers in debugfs

Ring segments have just been amended with a monotonically increasing number. To allow developers to inspect the segment numbers and ensure correctness in particular after ring expansion, expose them in each ring's "trbs" file in debugfs. Signed-off-by: Lukas Wunner <[email protected]> Signed-off-by: Mathias Nyman <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]>
mj22226 · Oct 21, 2023 · 01e6e14 · 01e6e14
1 parent 67ab841
commit 01e6e14
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/drivers/usb/host/xhci-debugfs.c b/drivers/usb/host/xhci-debugfs.c
@@ -204,7 +204,7 @@ static void xhci_ring_dump_segment(struct seq_file *s,
 	for (i = 0; i < TRBS_PER_SEGMENT; i++) {
 		trb = &seg->trbs[i];
 		dma = seg->dma + i * sizeof(*trb);
-		seq_printf(s, "%pad: %s\n", &dma,
+		seq_printf(s, "%2u %pad: %s\n", seg->num, &dma,
 			   xhci_decode_trb(str, XHCI_MSG_MAX, le32_to_cpu(trb->generic.field[0]),
 					   le32_to_cpu(trb->generic.field[1]),
 					   le32_to_cpu(trb->generic.field[2]),