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https://github.com/freebsd/freebsd-src
synced 2024-11-05 18:22:52 +00:00
Argl!, finally found this bummer. The code testing for a write-
protected drive at open() time has been *totally bogus*! The guy who submitted it didn't understand all the implications of calling set_motor(), and the `who' who included the patch into the tree did it blindly... Pleeeeze, don't commit code to this driver unless you are really going to understand what it does! This one caused me to pull out even more hears, and those who know me do know that i ain't got too many o'them. :-)
This commit is contained in:
Joerg Wunsch
parent
d5453ba5c4
commit
dac0f2dbc1
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=5552
3 changed files with 30 additions and 108 deletions
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@ -43,7 +43,7 @@
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* SUCH DAMAGE.
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*
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* from: @(#)fd.c 7.4 (Berkeley) 5/25/91
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* $Id: fd.c,v 1.16.1.2 1995/01/10 23:49:30 j Exp $
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* $Id: fd.c,v 1.48 1995/01/11 16:13:01 joerg Exp $
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*
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*/
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@ -971,33 +971,6 @@ Fdopen(dev_t dev, int flags)
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}
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}
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}
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/* select it */
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set_motor(fdc->fdcu, fd_data[fdu].fdsu, TURNON);
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if (flags & FWRITE) {
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/*
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* Check to make sure the diskette is writable:
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*/
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int err = 0;
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if (fd_sense_drive_status(fdc, &st3) != 0)
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err = EIO;
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else if ( (st3 & NE7_ST3_WP) )
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{
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/* XXX should be tprintf() */
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printf("fd%d: drive is write protected.\n", fdu);
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err = EIO;
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}
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if (err) {
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set_motor(fdc->fdcu, fd_data[fdu].fdsu, TURNOFF);
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return err;
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}
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}
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set_motor(fdc->fdcu, fd_data[fdu].fdsu, TURNOFF);
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fd_data[fdu].ft = fd_types + type - 1;
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fd_data[fdu].flags |= FD_OPEN;
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kdc_fd[fdu].kdc_state = DC_BUSY;
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@ -1597,14 +1570,8 @@ fdstate(fdcu_t fdcu, fdc_p fdc)
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return(1); /* will return immediatly */
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default:
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printf("fdc%d: Unexpected FD int->", fdcu);
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if (fd_sense_int(fdc, &st0, &cyl) != 0)
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{
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printf("[controller is dead now]\n");
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return(0);
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}
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printf("ST0 = %x, PCN = %x\n", st0, cyl);
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if (fd_read_status(fdc, fd->fdsu) == 0)
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printf("FDC status :%lx %lx %lx %lx %lx %lx %lx\n",
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printf("FDC status :%lx %lx %lx %lx %lx %lx %lx ",
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fdc->status[0],
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fdc->status[1],
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fdc->status[2],
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@ -1613,9 +1580,16 @@ fdstate(fdcu_t fdcu, fdc_p fdc)
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fdc->status[5],
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fdc->status[6] );
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else
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printf("No status available\n");
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printf("No status available ");
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if (fd_sense_int(fdc, &st0, &cyl) != 0)
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{
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printf("[controller is dead now]\n");
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return(0);
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}
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printf("ST0 = %x, PCN = %x\n", st0, cyl);
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return(0);
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}
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/*XXX confusing: some branches return immediately, others end up here*/
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return(1); /* Come back immediatly to new state */
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}
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@ -43,7 +43,7 @@
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* SUCH DAMAGE.
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*
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* from: @(#)fd.c 7.4 (Berkeley) 5/25/91
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* $Id: fd.c,v 1.16.1.2 1995/01/10 23:49:30 j Exp $
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* $Id: fd.c,v 1.48 1995/01/11 16:13:01 joerg Exp $
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*
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*/
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@ -971,33 +971,6 @@ Fdopen(dev_t dev, int flags)
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}
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}
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}
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/* select it */
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set_motor(fdc->fdcu, fd_data[fdu].fdsu, TURNON);
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if (flags & FWRITE) {
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/*
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* Check to make sure the diskette is writable:
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*/
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int err = 0;
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if (fd_sense_drive_status(fdc, &st3) != 0)
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err = EIO;
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else if ( (st3 & NE7_ST3_WP) )
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{
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/* XXX should be tprintf() */
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printf("fd%d: drive is write protected.\n", fdu);
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err = EIO;
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}
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if (err) {
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set_motor(fdc->fdcu, fd_data[fdu].fdsu, TURNOFF);
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return err;
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}
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}
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set_motor(fdc->fdcu, fd_data[fdu].fdsu, TURNOFF);
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fd_data[fdu].ft = fd_types + type - 1;
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fd_data[fdu].flags |= FD_OPEN;
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kdc_fd[fdu].kdc_state = DC_BUSY;
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@ -1597,14 +1570,8 @@ fdstate(fdcu_t fdcu, fdc_p fdc)
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return(1); /* will return immediatly */
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default:
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printf("fdc%d: Unexpected FD int->", fdcu);
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if (fd_sense_int(fdc, &st0, &cyl) != 0)
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{
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printf("[controller is dead now]\n");
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return(0);
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}
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printf("ST0 = %x, PCN = %x\n", st0, cyl);
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if (fd_read_status(fdc, fd->fdsu) == 0)
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printf("FDC status :%lx %lx %lx %lx %lx %lx %lx\n",
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printf("FDC status :%lx %lx %lx %lx %lx %lx %lx ",
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fdc->status[0],
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fdc->status[1],
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fdc->status[2],
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@ -1613,9 +1580,16 @@ fdstate(fdcu_t fdcu, fdc_p fdc)
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fdc->status[5],
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fdc->status[6] );
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else
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printf("No status available\n");
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printf("No status available ");
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if (fd_sense_int(fdc, &st0, &cyl) != 0)
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{
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printf("[controller is dead now]\n");
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return(0);
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}
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printf("ST0 = %x, PCN = %x\n", st0, cyl);
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return(0);
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}
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/*XXX confusing: some branches return immediately, others end up here*/
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return(1); /* Come back immediatly to new state */
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}
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46
sys/isa/fd.c
46
sys/isa/fd.c
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@ -43,7 +43,7 @@
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* SUCH DAMAGE.
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*
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* from: @(#)fd.c 7.4 (Berkeley) 5/25/91
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* $Id: fd.c,v 1.16.1.2 1995/01/10 23:49:30 j Exp $
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* $Id: fd.c,v 1.48 1995/01/11 16:13:01 joerg Exp $
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*
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*/
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@ -971,33 +971,6 @@ Fdopen(dev_t dev, int flags)
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}
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}
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}
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/* select it */
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set_motor(fdc->fdcu, fd_data[fdu].fdsu, TURNON);
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if (flags & FWRITE) {
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/*
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* Check to make sure the diskette is writable:
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*/
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int err = 0;
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if (fd_sense_drive_status(fdc, &st3) != 0)
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err = EIO;
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else if ( (st3 & NE7_ST3_WP) )
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{
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/* XXX should be tprintf() */
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printf("fd%d: drive is write protected.\n", fdu);
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err = EIO;
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}
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if (err) {
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set_motor(fdc->fdcu, fd_data[fdu].fdsu, TURNOFF);
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return err;
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}
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}
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set_motor(fdc->fdcu, fd_data[fdu].fdsu, TURNOFF);
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fd_data[fdu].ft = fd_types + type - 1;
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fd_data[fdu].flags |= FD_OPEN;
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kdc_fd[fdu].kdc_state = DC_BUSY;
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@ -1597,14 +1570,8 @@ fdstate(fdcu_t fdcu, fdc_p fdc)
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return(1); /* will return immediatly */
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default:
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printf("fdc%d: Unexpected FD int->", fdcu);
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if (fd_sense_int(fdc, &st0, &cyl) != 0)
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{
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printf("[controller is dead now]\n");
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return(0);
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}
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printf("ST0 = %x, PCN = %x\n", st0, cyl);
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if (fd_read_status(fdc, fd->fdsu) == 0)
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printf("FDC status :%lx %lx %lx %lx %lx %lx %lx\n",
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printf("FDC status :%lx %lx %lx %lx %lx %lx %lx ",
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fdc->status[0],
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fdc->status[1],
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fdc->status[2],
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@ -1613,9 +1580,16 @@ fdstate(fdcu_t fdcu, fdc_p fdc)
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fdc->status[5],
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fdc->status[6] );
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else
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printf("No status available\n");
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printf("No status available ");
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if (fd_sense_int(fdc, &st0, &cyl) != 0)
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{
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printf("[controller is dead now]\n");
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return(0);
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}
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printf("ST0 = %x, PCN = %x\n", st0, cyl);
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return(0);
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}
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/*XXX confusing: some branches return immediately, others end up here*/
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return(1); /* Come back immediatly to new state */
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}
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