The HDIO_DRIVE_RESET ioctl implementation in ide.c is broken :
linux-2.4.8-ac8 , hdd is a Teac CD532E-B CDROM drive
( it is the same for several latest linux versions )
[root@localhost scsireset]# ./idereset /dev/hdd # source of iderest below , it just sends the ioctl
hdd: DMA disabled
idereset : ioctl succesful # this is from my idereset program , the rest are kernel messages
hdd: ide_set_handler: handler not null; old=c017e9a0, new=e08ce2f0
bug: kernel timer added twice at c017e8e8.
relevant System.map parts :
c017e800 T ide_end_request
c017e890 T ide_set_handler
c017e8f0 T current_capacity
c017e920 T ide_geninit
c017e9a0 t atapi_reset_pollfunc
c017ea70 t reset_pollfunc
c017ebd0 t check_dma_crc
part of `ksymoops -s all.map` :
e08ce240 t cdrom_start_read [ide-cd]
e08ce2f0 t cdrom_pc_intr [ide-cd]
e08ce4b0 t cdrom_do_pc_continuation [ide-cd]
source if idereset.c :
/*************************
* idereset - reset an ide device
*
* Usage : idereset /dev/hdX
*
*/
#define IDERESET_VERSION "v0.1"
#include <string.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <unistd.h>
#include <linux/hdreg.h>
void print_usage(FILE * out_file)
{
fprintf(out_file,"idereset " IDERESET_VERSION "\nArgument error.Usage :\n");
fprintf(out_file,"idereset /dev/hdX\n");
}
int main (int argc,char ** argv)
{
int device_fd; /* file descriptor for the device file */
if ( argc !=2 )
{
print_usage(stderr);
return 1;
}
/* open device */
device_fd=open(argv[1], O_RDONLY | O_NONBLOCK);
if ( device_fd == -1 )
{
perror(argv[1]);
return 1;
}
/* ioctl */
if(ioctl( device_fd, HDIO_DRIVE_RESET , NULL))
perror(argv[1]);
else
printf("idereset : ioctl succesful\n");
close(device_fd);
return 0;
}
-- David Balazic -------------- "Be excellent to each other." - Bill & Ted - - - - - - - - - - - - - - - - - - - - - - - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Thu Aug 23 2001 - 21:00:55 EST