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Panic if DMA with odd length attempted on a 16-bit channel.

This commit is contained in:
mycroft 1993-10-16 03:55:59 +00:00
parent 1016b2b626
commit c73d85d341
2 changed files with 4 additions and 4 deletions
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4
sys/arch/i386/isa/dma.c
View File

@ -35,7 +35,7 @@
* SUCH DAMAGE.
*
* from: @(#)isa.c 7.2 (Berkeley) 5/13/91
* $Id: dma.c,v 1.1 1993/10/14 05:22:57 mycroft Exp $
* $Id: dma.c,v 1.2 1993/10/16 03:55:59 mycroft Exp $
*/
/*
@ -123,7 +123,7 @@ at_dma(read, addr, nbytes, chan)
if (chan > 7 ||
(chan < 4 && nbytes > (1<<16)) ||
(chan >= 4 && (nbytes > (1<<17) || (u_int)addr & 1)))
(chan >= 4 && (nbytes > (1<<17) || nbytes & 1 || (u_int)addr & 1)))
panic("at_dma: impossible request");
if (at_dma_rangecheck((vm_offset_t)addr, nbytes, chan)) {

4
sys/dev/isa/isadma.c
View File

@ -35,7 +35,7 @@
* SUCH DAMAGE.
*
* from: @(#)isa.c 7.2 (Berkeley) 5/13/91
* $Id: isadma.c,v 1.1 1993/10/14 05:22:57 mycroft Exp $
* $Id: isadma.c,v 1.2 1993/10/16 03:55:59 mycroft Exp $
*/
/*
@ -123,7 +123,7 @@ at_dma(read, addr, nbytes, chan)
if (chan > 7 ||
(chan < 4 && nbytes > (1<<16)) ||
(chan >= 4 && (nbytes > (1<<17) || (u_int)addr & 1)))
(chan >= 4 && (nbytes > (1<<17) || nbytes & 1 || (u_int)addr & 1)))
panic("at_dma: impossible request");
if (at_dma_rangecheck((vm_offset_t)addr, nbytes, chan)) {