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UPSTREAM: usb: host: xhci: extract xhci_slot_state_string()

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By extracting and exposing xhci_slot_state_string() in a header file, we
can re-use it to print Slot Context State from our tracepoints, which
can aid in tracking down problems related to command execution.

Change-Id: I65d812e5d1137a56da74bde0b846f9ad03ff2234
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: William Wu <william.wu@rock-chips.com>
(cherry picked from commit 52407729fb)
This commit is contained in:
Felipe Balbi
2017-04-07 17:56:56 +03:00
committed by Tao Huang
parent ea71b9c501
commit e2fcb9338b
2 changed files with 18 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/usb/host/xhci-dbg.c
View File

@@ -453,19 +453,9 @@ char *xhci_get_slot_state(struct xhci_hcd *xhci,
struct xhci_container_ctx *ctx)
{
struct xhci_slot_ctx *slot_ctx = xhci_get_slot_ctx(xhci, ctx);
int state = GET_SLOT_STATE(le32_to_cpu(slot_ctx->dev_state));
switch (GET_SLOT_STATE(le32_to_cpu(slot_ctx->dev_state))) {
case SLOT_STATE_ENABLED:
return "enabled/disabled";
case SLOT_STATE_DEFAULT:
return "default";
case SLOT_STATE_ADDRESSED:
return "addressed";
case SLOT_STATE_CONFIGURED:
return "configured";
default:
return "reserved";
}
return xhci_slot_state_string(state);
}
static void xhci_dbg_slot_ctx(struct xhci_hcd *xhci, struct xhci_container_ctx *ctx)

16
drivers/usb/host/xhci.h
View File

@@ -2139,6 +2139,22 @@ static inline struct xhci_ring *xhci_urb_to_transfer_ring(struct xhci_hcd *xhci,
urb->stream_id);
}
static inline char *xhci_slot_state_string(u32 state)
{
switch (state) {
case SLOT_STATE_ENABLED:
return "enabled/disabled";
case SLOT_STATE_DEFAULT:
return "default";
case SLOT_STATE_ADDRESSED:
return "addressed";
case SLOT_STATE_CONFIGURED:
return "configured";
default:
return "reserved";
}
}
static inline const char *xhci_decode_trb(u32 field0, u32 field1, u32 field2,
u32 field3)
{