Commit 4cd82cf7 authored by Mathias Nyman's avatar Mathias Nyman Committed by Kamal Mostafa

xhci: init command timeout timer earlier to avoid deleting it uninitialized

commit cc8e4fc0 upstream.

Don't check if timer is running with a timer_pending() before
deleting it with del_timer_sync(), this defies the whole point of
the sync part and can cause a possible race.

Instead we just want to make sure the timer is initialized early enough
before we have a chance to delete it.
Reported-by: default avatarOliver Neukum <oneukum@suse.com>
Signed-off-by: default avatarMathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarKamal Mostafa <kamal@canonical.com>
parent 064a387a
No related merge requests found
......@@ -1795,8 +1795,7 @@ void xhci_mem_cleanup(struct xhci_hcd *xhci)
int size;
int i, j, num_ports;
if (timer_pending(&xhci->cmd_timer))
del_timer_sync(&xhci->cmd_timer);
del_timer_sync(&xhci->cmd_timer);
/* Free the Event Ring Segment Table and the actual Event Ring */
size = sizeof(struct xhci_erst_entry)*(xhci->erst.num_entries);
......@@ -2324,6 +2323,10 @@ int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags)
INIT_LIST_HEAD(&xhci->cmd_list);
/* init command timeout timer */
setup_timer(&xhci->cmd_timer, xhci_handle_command_timeout,
(unsigned long)xhci);
page_size = readl(&xhci->op_regs->page_size);
xhci_dbg_trace(xhci, trace_xhci_dbg_init,
"Supported page size register = 0x%x", page_size);
......@@ -2508,10 +2511,6 @@ int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags)
"Wrote ERST address to ir_set 0.");
xhci_print_ir_set(xhci, 0);
/* init command timeout timer */
setup_timer(&xhci->cmd_timer, xhci_handle_command_timeout,
(unsigned long)xhci);
/*
* XXX: Might need to set the Interrupter Moderation Register to
* something other than the default (~1ms minimum between interrupts).
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment