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<!-- subject="IRIX SCSI driver update for SANE 0.65/0.66" -->
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<title>sane-devel: IRIX SCSI driver update for SANE 0.65/0.66</title>
<h1>IRIX SCSI driver update for SANE 0.65/0.66</h1>
<b>Michael Sweet</b> (<a href="mailto:mike@easysw.com"><i>mike@easysw.com</i></a>)<br>
<i>Fri, 17 Oct 1997 11:12:10 -0400</i>
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<p>
OK, here is a unified diff patch that will fix the SCSI errors some<br>
users were experiencing.<br>
<p>
The problem was with the data directly following the SCSI command codes.<br>
Depending on the command this data could be misaligned. The updated<br>
code copies the command data (up to 64k worth) to a local buffer and<br>
uses the copy.<br>
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--
________________________________________________________________________
Mike Sweet Software for SGI and Sun Easy Software Products
(301) 373-9603 Workstations 44145 Airport View Drive
mike@easysw.com <a href="http://www.easysw.com">http://www.easysw.com</a> Hollywood, Maryland 20636
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--- sanei_scsi.c.orig Fri Oct 17 10:48:17 1997
+++ sanei_scsi.c Fri Oct 17 10:54:09 1997
@@ -1068,10 +1068,12 @@
sanei_scsi_cmd (int fd, const void *src, size_t src_size,
void *dst, size_t *dst_size)
{
- dsreq_t scsi_req; /* SCSI request */
- u_char sensebuf[1024]; /* Request sense buffer */
- size_t cdb_size; /* Size of SCSI command */
+ dsreq_t scsi_req; /* SCSI request */
+ u_char sensebuf[1024], /* Request sense buffer */
+ databuf[65536]; /* Command data buffer */
+ size_t cdb_size; /* Size of SCSI command */
+
cdb_size = CDB_SIZE(*(u_char *)src);
memset(&amp;scsi_req, 0, sizeof(scsi_req));
@@ -1099,10 +1101,16 @@
scsi_req.ds_time = 120 * 1000;
scsi_req.ds_cmdbuf = (caddr_t)src;
scsi_req.ds_cmdlen = cdb_size;
- scsi_req.ds_databuf = (caddr_t)src + cdb_size;
+ scsi_req.ds_databuf = (caddr_t)databuf;
scsi_req.ds_datalen = src_size - cdb_size;
scsi_req.ds_sensebuf = (caddr_t)sensebuf;
scsi_req.ds_senselen = sizeof (sensebuf);
+
+ /*
+ * Copy data portion to local buffer to ensure 32-bit alignment...
+ */
+
+ memcpy(databuf, ((u_char)src) + cdb_size, src_size - cdb_size);
}
if (ioctl (fd, DS_ENTER, &amp;scsi_req) &lt; 0)
return SANE_STATUS_IO_ERROR;
<p>
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