Scott Wood-2 wrote:
>
> Misbah khan wrote:
>> Hi all I am using "test_bit(),set_bit(),clear_bit() etc" API functions
>> provided by the Linux kernel. I want to know that if anybody is used it
>> and have full faith in its operation then please let me know. Driver in
>> the while loop is calling these API's hence i want to make sure that its
>> operation will remain stable.
>
> They're used all over the place. Is there anything about them that you
> find suspect?
>
> -Scott
>
> I have devloped a character driver for FPGA which is memory mapped and
> using these API's to test a bit , set a bit or to clear a bit in the
> memory for eg :-
>
> /* poll till data is transfered from sdram to dpram */
> while((test_bit(DFR_BUSY,(UINT32 *)(\
> (void *)mmap_reg_ptr + DATA_STATUS_REG))==1)\
> && (delay < MAX_DELAY_BUSY))
> {
> KDEBUG3(" In the Dfr delay loop \n");
> mdelay(DELAY);
> delay+=DELAY;
> }/* End of while(test_bit(FPGA_BUSY,(void *)register name) */
>
> if(delay==MAX_DELAY_BUSY)
> {
> KDEBUG1("Out of the the Dfr busy loop \n");
> return -1;
> }
>
> People working for FPGA are sure that they are not making the bit high
> where in my driver is returning -1 from the kernel space aborting it after
> running for few minutes or so . Please let me know that This function is
> stable and i should tell them that the driver is stable in its operation
> and they should check it from there side.
>
> Misbah
>
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>
>
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