Doubt in interrupt handling in drivers,

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I am writing small driver for switchs in black processor (BF535)

problem is
          for generating switch interrupt i use a general purpose interrupt
which is of lower priority

          In other module a serial port interrupt is used which is of higher
priority compared to my switch interrupt .
          Now due to low priority switch interrrupt  is not working

           Can anyone give me a solution abt how to solve this problem

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Ravi Shankar .S
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