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Fix read for /kern/xen/xenbus: ignore offset.

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This commit is contained in:
bouyer 2006-05-07 21:49:56 +00:00
parent 61ebbef433
commit 621b16009d
1 changed files with 5 additions and 9 deletions
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14
sys/arch/xen/xenbus/xenbus_dev.c
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@ -1,4 +1,4 @@
/* $NetBSD: xenbus_dev.c,v 1.4 2006/05/07 10:18:28 bouyer Exp $ */
/* $NetBSD: xenbus_dev.c,v 1.5 2006/05/07 21:49:56 bouyer Exp $ */
/*
* xenbus_dev.c
*
@ -31,7 +31,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: xenbus_dev.c,v 1.4 2006/05/07 10:18:28 bouyer Exp $");
__KERNEL_RCSID(0, "$NetBSD: xenbus_dev.c,v 1.5 2006/05/07 21:49:56 bouyer Exp $");
#include "opt_xen.h"
@ -136,24 +136,20 @@ xenbus_dev_read(void *v)
if (err)
goto end;
}
if (uio->uio_offset != 0) {
err = EINVAL;
goto end;
}
offset = 0;
offset = uio->uio_offset;
if (u->read_cons > u->read_prod) {
err = uiomove(&u->read_buffer[MASK_READ_IDX(u->read_cons)],
0U - u->read_cons, uio);
if (err)
goto end;
u->read_cons += uio->uio_offset;
u->read_cons += (uio->uio_offset - offset);
offset = uio->uio_offset;
}
err = uiomove(&u->read_buffer[MASK_READ_IDX(u->read_cons)],
u->read_prod - u->read_cons, uio);
if (err == 0)
u->read_cons += uio->uio_offset - offset;
u->read_cons += (uio->uio_offset - offset);
end:
splx(s);