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| author | Ming Lei <ming.lei@canonical.com> | 2013-08-08 21:48:23 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-08-12 11:56:16 -0700 |
| commit | fc76051c453b4e65e736aed10e57192adcbcd453 (patch) | |
| tree | 1e0d83af539eec72970f1aa316c18841e2e88154 | |
| parent | bcc48f1a7a0d40ae2e5a26aff72c2b674fd8b596 (diff) | |
| download | linux-fc76051c453b4e65e736aed10e57192adcbcd453.tar.bz2 | |
USB: XHCI: mark no_sg_constraint
This patch marks all xHCI controllers as no_sg_constraint
since xHCI supports building packet from discontinuous buffers.
Cc: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/host/xhci.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index c8d7199eefa0..246de8905db1 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -4841,6 +4841,10 @@ int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks) /* Accept arbitrarily long scatter-gather lists */ hcd->self.sg_tablesize = ~0; + + /* support to build packet from discontinuous buffers */ + hcd->self.no_sg_constraint = 1; + /* XHCI controllers don't stop the ep queue on short packets :| */ hcd->self.no_stop_on_short = 1; |