isdn/gigaset: Provide cardstate context for bas timer callbacks
While the work callback uses the urb to find cardstate from bas_cardstate, this may not be valid for timer callbacks. Instead, introduce a direct pointer back to the cardstate from bas_cardstate for use in timer callbacks. Reported-by: Paul Bolle <pebolle@tiscali.nl> Fixes: 4cfea08e ("isdn/gigaset: Convert timers to use timer_setup()") Cc: Paul Bolle <pebolle@tiscali.nl> Cc: Karsten Keil <isdn@linux-pingi.de> Cc: "David S. Miller" <davem@davemloft.net> Cc: Johan Hovold <johan@kernel.org> Cc: gigaset307x-common@lists.sourceforge.net Cc: netdev@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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