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xhci: Add a global command queue

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Create a list to store command structures, add a structure to it every time
a command is submitted, and remove it from the list once we get a
command completion event matching the command.

Callers that wait for completion will free their command structures themselves.
The other command structures are freed in the command completion event handler.

Also add a check that prevents queuing commands if host is dying

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mathias Nyman
2014-05-08 19:26:01 +03:00
committed by Greg Kroah-Hartman
parent ddba5cd0ae
commit c9aa1a2de4
4 changed files with 34 additions and 6 deletions
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2
drivers/usb/host/xhci-mem.c
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@@ -1821,6 +1821,7 @@ void xhci_mem_cleanup(struct xhci_hcd *xhci)
list_del(&cur_cd->cancel_cmd_list);
kfree(cur_cd);
}
xhci_cleanup_command_queue(xhci);
for (i = 1; i < MAX_HC_SLOTS; ++i)
xhci_free_virt_device(xhci, i);
@@ -2324,6 +2325,7 @@ int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags)
int i;
INIT_LIST_HEAD(&xhci->cancel_cmd_list);
INIT_LIST_HEAD(&xhci->cmd_list);
page_size = readl(&xhci->op_regs->page_size);
xhci_dbg_trace(xhci, trace_xhci_dbg_init,