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USB: xhci: Refactor test for vendor-specific completion codes. 

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@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Sarah Sharp 2009-12-09 15:59:06 -08:00 committed by Greg Kroah-Hartman
parent a1d78c16bd
commit b45b506911
2 changed files with 16 additions and 7 deletions
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22
drivers/usb/host/xhci-ring.c
View File

@ -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;
}

1
drivers/usb/host/xhci.h
View File

@ -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);