diff options
| author | Lukas Wunner <lukas@wunner.de> | 2023-10-19 13:29:12 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-10-21 13:38:53 +0300 |
| commit | 67ab841a177d3ea16cb2f30e517fdf0ad60afe8f (patch) | |
| tree | 8d16cc4932fd8a850302fa352e1a4a06ca4855a1 /drivers/usb | |
| parent | 35899f58fe13d385b1dbc33004e5a31bf2c18b7a (diff) | |
| download | linux-67ab841a177d3ea16cb2f30e517fdf0ad60afe8f.tar.xz | |
xhci: Update last segment pointer after Event Ring expansion
When expanding a ring at its "end", ring->last_seg needs to be updated
for Event Rings as well, not just for all the other ring types.
This is not a fix because ring expansion currently isn't done on the
Event Ring. It's just in preparation for when it's added.
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20231019102924.2797346-8-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/host/xhci-mem.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index 1c0f5263cf81..d4123e6f2549 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -146,11 +146,13 @@ static void xhci_link_rings(struct xhci_hcd *xhci, struct xhci_ring *ring, xhci_link_segments(last, next, ring->type, chain_links); ring->num_segs += num_segs; - if (ring->type != TYPE_EVENT && ring->enq_seg == ring->last_seg) { - ring->last_seg->trbs[TRBS_PER_SEGMENT-1].link.control - &= ~cpu_to_le32(LINK_TOGGLE); - last->trbs[TRBS_PER_SEGMENT-1].link.control - |= cpu_to_le32(LINK_TOGGLE); + if (ring->enq_seg == ring->last_seg) { + if (ring->type != TYPE_EVENT) { + ring->last_seg->trbs[TRBS_PER_SEGMENT-1].link.control + &= ~cpu_to_le32(LINK_TOGGLE); + last->trbs[TRBS_PER_SEGMENT-1].link.control + |= cpu_to_le32(LINK_TOGGLE); + } ring->last_seg = last; } |