serial: ifx6x60: del_timer_sync must not be called in interrupt context.
This patch make use of del_timer instead of del_timer_sync in the interrupt context. The spi_timer function don't use any resources that may release after running del_timer, so using the del_timer is also safe and enough in this context. Signed-off-by: NChen Jun <jun.d.chen@intel.com> Acked-by: NAlan Cox <alan@linux.intel.com> Tested-by: NChuansheng Liu <chuansheng.liu@intel.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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