diff options
| author | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2009-12-09 23:59:01 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-03-02 22:53:08 (GMT) |
| commit | 412566bd716397e28e81fc9b20804bc6a6daf14d (patch) | |
| tree | 4013aaa1eda796f8dedea243167f3f4811d211b4 /drivers/usb/host | |
| parent | c01591bd6ece72e1c099cbc25ed812e1add579dc (diff) | |
| download | linux-412566bd716397e28e81fc9b20804bc6a6daf14d.tar.xz | |
USB: xhci: Refactor code to free or cache endpoint rings.
Refactor out the code to cache or free endpoint rings from recently
dropped or disabled endpoints. This code will be used by a new function
to reset a device and disable all endpoints except control endpoint 0.
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-hcd.c | 19 | ||||
| -rw-r--r-- | drivers/usb/host/xhci-mem.c | 25 | ||||
| -rw-r--r-- | drivers/usb/host/xhci.h | 3 |
3 files changed, 29 insertions, 18 deletions
diff --git a/drivers/usb/host/xhci-hcd.c b/drivers/usb/host/xhci-hcd.c index 0c5c1b2..451f53e 100644 --- a/drivers/usb/host/xhci-hcd.c +++ b/drivers/usb/host/xhci-hcd.c @@ -1266,30 +1266,13 @@ int xhci_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev) xhci_zero_in_ctx(xhci, virt_dev); /* Install new rings and free or cache any old rings */ for (i = 1; i < 31; ++i) { - int rings_cached; - if (!virt_dev->eps[i].new_ring) continue; /* Only cache or free the old ring if it exists. * It may not if this is the first add of an endpoint. */ if (virt_dev->eps[i].ring) { - rings_cached = virt_dev->num_rings_cached; - if (rings_cached < XHCI_MAX_RINGS_CACHED) { - virt_dev->num_rings_cached++; - rings_cached = virt_dev->num_rings_cached; - virt_dev->ring_cache[rings_cached] = - virt_dev->eps[i].ring; - xhci_dbg(xhci, "Cached old ring, " - "%d ring%s cached\n", - rings_cached, - (rings_cached > 1) ? "s" : ""); - } else { - xhci_ring_free(xhci, virt_dev->eps[i].ring); - xhci_dbg(xhci, "Ring cache full (%d rings), " - "freeing ring\n", - virt_dev->num_rings_cached); - } + xhci_free_or_cache_endpoint_ring(xhci, virt_dev, i); } virt_dev->eps[i].ring = virt_dev->eps[i].new_ring; virt_dev->eps[i].new_ring = NULL; diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index bffcef7..1f1f8a0 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -198,6 +198,31 @@ fail: return 0; } +void xhci_free_or_cache_endpoint_ring(struct xhci_hcd *xhci, + struct xhci_virt_device *virt_dev, + unsigned int ep_index) +{ + int rings_cached; + + rings_cached = virt_dev->num_rings_cached; + if (rings_cached < XHCI_MAX_RINGS_CACHED) { + virt_dev->num_rings_cached++; + rings_cached = virt_dev->num_rings_cached; + virt_dev->ring_cache[rings_cached] = + virt_dev->eps[ep_index].ring; + xhci_dbg(xhci, "Cached old ring, " + "%d ring%s cached\n", + rings_cached, + (rings_cached > 1) ? "s" : ""); + } else { + xhci_ring_free(xhci, virt_dev->eps[ep_index].ring); + xhci_dbg(xhci, "Ring cache full (%d rings), " + "freeing ring\n", + virt_dev->num_rings_cached); + } + virt_dev->eps[ep_index].ring = NULL; +} + /* Zero an endpoint ring (except for link TRBs) and move the enqueue and dequeue * pointers to the beginning of the ring. */ diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 8778135..61747f3 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -1233,6 +1233,9 @@ int xhci_endpoint_init(struct xhci_hcd *xhci, struct xhci_virt_device *virt_dev, struct usb_device *udev, struct usb_host_endpoint *ep, gfp_t mem_flags); void xhci_ring_free(struct xhci_hcd *xhci, struct xhci_ring *ring); +void xhci_free_or_cache_endpoint_ring(struct xhci_hcd *xhci, + struct xhci_virt_device *virt_dev, + unsigned int ep_index); struct xhci_command *xhci_alloc_command(struct xhci_hcd *xhci, bool allocate_completion, gfp_t mem_flags); void xhci_free_command(struct xhci_hcd *xhci, |