diff options
| author | Sarah Sharp | 2011-09-14 01:41:12 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2011-09-20 21:33:49 +0200 |
| commit | 170c026347c867a71e27713b98c58b266146c468 (patch) | |
| tree | de0b8e1855b93ecae7d6d6dfe3138c6228b5fb54 /drivers/usb/host | |
| parent | usbcore: refine warm reset logic (diff) | |
| download | kernel-qcow2-linux-170c026347c867a71e27713b98c58b266146c468.tar.gz kernel-qcow2-linux-170c026347c867a71e27713b98c58b266146c468.tar.xz kernel-qcow2-linux-170c026347c867a71e27713b98c58b266146c468.zip | |
xhci: Fix mult base in endpoint bandwidth info.
The "Mult" bits in the SuperSpeed Endpoint Companion Descriptor are
zero-based, and the xHCI host controller wants them to be zero-based in
the input context. However, for the bandwidth math, we want them to be
one-based. Fix this.
Fix the documentation about the endpoint bandwidth mult variable in the
xhci.h file, which says it is zero-based. Also fix the documentation
about num_packets, which is also one-based, not zero-based.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host')
| -rw-r--r-- | drivers/usb/host/xhci-mem.c | 9 | ||||
| -rw-r--r-- | drivers/usb/host/xhci.h | 3 |
2 files changed, 7 insertions, 5 deletions
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index c4b8959e01e7..94a8b28d602e 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -1473,11 +1473,12 @@ void xhci_update_bw_info(struct xhci_hcd *xhci, /* Added or changed endpoint */ bw_info->ep_interval = CTX_TO_EP_INTERVAL( le32_to_cpu(ep_ctx->ep_info)); - bw_info->mult = CTX_TO_EP_MULT( - le32_to_cpu(ep_ctx->ep_info)); - /* Number of packets is zero-based in the input context, - * but we want one-based for the interval table. + /* Number of packets and mult are zero-based in the + * input context, but we want one-based for the + * interval table. */ + bw_info->mult = CTX_TO_EP_MULT( + le32_to_cpu(ep_ctx->ep_info)) + 1; bw_info->num_packets = CTX_TO_MAX_BURST( le32_to_cpu(ep_ctx->ep_info2)) + 1; bw_info->max_packet_size = MAX_PACKET_DECODED( diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 13f1c23ed19d..752a500f8695 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -747,8 +747,9 @@ struct xhci_stream_info { * (DMI) also limits the total bandwidth (across all domains) that can be used. */ struct xhci_bw_info { + /* ep_interval is zero-based */ unsigned int ep_interval; - /* mult and num_packets are zero-based */ + /* mult and num_packets are one-based */ unsigned int mult; unsigned int num_packets; unsigned int max_packet_size; |