All commands that can be issued to the xHCI hardware can come back with
vendor-specific "informational" completion codes. These are to be treated
like a successful completion code. Refactor out the code to test for the
range of these codes and print debugging messages.
Signed-off-by: Sarah Sharp <sarah.a.sharp@xxxxxxxxxxxxxxx>
---
drivers/usb/host/xhci-ring.c | 22 +++++++++++++++-------
drivers/usb/host/xhci.h | 1 +
2 files changed, 16 insertions(+), 7 deletions(-)
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index ee7bc7e..f43e073 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -1080,6 +1080,20 @@ static int xhci_requires_manual_halt_cleanup(struct xhci_hcd *xhci,
return 0;
}
+int xhci_is_vendor_info_code(struct xhci_hcd *xhci, unsigned int trb_comp_code)
+{
+ if (trb_comp_code >= 224 && trb_comp_code <= 255) {
+ /* Vendor defined "informational" completion code,
+ * treat as not-an-error.
+ */
+ xhci_dbg(xhci, "Vendor defined info completion code %u\n",
+ trb_comp_code);
+ xhci_dbg(xhci, "Treating code as success.\n");
+ return 1;
+ }
+ return 0;
+}
+
/*
* If this function returns an error condition, it means it got a Transfer
* event with a corrupted Slot ID, Endpoint ID, or TRB DMA address.
@@ -1196,13 +1210,7 @@ static int handle_tx_event(struct xhci_hcd *xhci,
status = -ENOSR;
break;
default:
- if (trb_comp_code >= 224 && trb_comp_code <= 255) {
- /* Vendor defined "informational" completion code,
- * treat as not-an-error.
- */
- xhci_dbg(xhci, "Vendor defined info completion code %u\n",
- trb_comp_code);
- xhci_dbg(xhci, "Treating code as success.\n");
+ if (xhci_is_vendor_info_code(xhci, trb_comp_code)) {
status = 0;
break;
}
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 902be96..20122ec 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1276,6 +1276,7 @@ dma_addr_t xhci_trb_virt_to_dma(struct xhci_segment *seg, union xhci_trb *trb);
struct xhci_segment *trb_in_td(struct xhci_segment *start_seg,
union xhci_trb *start_trb, union xhci_trb *end_trb,
dma_addr_t suspect_dma);
+int xhci_is_vendor_info_code(struct xhci_hcd *xhci, unsigned int trb_comp_code);
void xhci_ring_cmd_db(struct xhci_hcd *xhci);
void *xhci_setup_one_noop(struct xhci_hcd *xhci);
void xhci_handle_event(struct xhci_hcd *xhci);
--
1.6.3.3
--
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