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help regarding device driver

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Old 09-08-2008
help regarding device driver
Hi All,
I have a device driver that uses UARTserial port to write/read to-from a device.
That device driver is working fine on FC3 machine( kernel version 2.6.12)...
Now I am switching to FC9 (kernel version 2.6.25.11-97).I have changed the interrupt flag SA_INTERRUPT to IRQF_DISABLED for FC9.
device driver is compiling & loading properly.My program is able to send the data as well as device is also responding but I m not able to get the data inside the PC.According to me ,recieve data line interrupt is not able to get CPU attention in properly time.may be I have to increase the priority of IRQ4.
so plz tell me how to increase the priority of IRQ4 in FC9 or any other solutuion...
Thnx in advance....

regards,
Raj
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LEARN ABOUT DEBIAN

pt

PT(4)							   BSD Kernel Interfaces Manual 						     PT(4)

NAME

     pt -- SCSI processor type driver

SYNOPSIS

     device pt

DESCRIPTION

     The pt driver provides support for a SCSI processor type device.  These are usually scanners and other devices using the SCSI link as a com-
     munication interface with device specific commands embedded in the data stream.

     A SCSI adapter must be separately configured into the system before this driver can be used.

     This device supports read(2) and write(2), and the ioctl(2) calls described below.

IOCTLS

     The following ioctl(2) calls are supported by the pt driver.  They are defined in the header file <sys/ptio.h>.

     PTIOCGETTIMEOUT  This ioctl allows userland applications to fetch the current pt driver read and write timeout.  The value returned is in
		      seconds.

     PTIOCSETTIMEOUT  This ioctl allows userland applications to set the current pt driver read and write timeouts.  The value should be in sec-
		      onds.

FILES

     /dev/ptN	 the Nth processor device.

SEE ALSO

     cam(4)

HISTORY

     The pt driver appeared in FreeBSD 2.1.

BSD
								   March 2, 1995							       BSD