On 9/7/05, Greg KH <greg@xxxxxxxxx> wrote:
>
> On Tue, Sep 06, 2005 at 09:11:45AM +0530, raja wrote:
> > It is compiling and the module is inserting.
>
> This is working on 2.6? Which kernel version?
>
>
>
> > printk("Hello World 4 \n");
> > int ret_val = register_chrdev_region(start,count,NAME);
>
> > Is there any wrong with using the function call?
>
> Incorrectly, yes, it will oops.
>
here you are calling register_chrdev_region with start, count and NAME
......... where
dev_t start = 255; This would be in the form of Major,Minor
...... and you are only assigning to it and this will make
start=0x00FF (here major=0 and minor=255) and then
register_chrdev_region tries to __register_chrdev_region from 0 to 10
(10 is what you provided in count) !!! and almost all majors from 0 to
10 are already registered with kernel by other devices ....
by the way I don't know what register_chrdev_region does b/c I m
working on block devices not on char devices, but I m telling you what
I realized from looking at the code of register_chrdev_region ....
(CMIIW)
--
Fawad Lateef
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