[PATCH] 2.5.14 IDE CD-ROM PIO mode

Osamu Tomita (tomita@cinet.co.jp)
Tue, 07 May 2002 17:51:18 +0900

I could not use CD-ROM drive [PIO mode] on 2.5.14.
Error messeges are follows.

May 7 11:05:03 sarah kernel: hdc: cdrom_read_intr: data underrun (4294967292 blocks)
May 7 11:05:03 sarah kernel: end_request: I/O error, dev 16:00, sector 92
May 7 11:05:03 sarah kernel: Buffer I/O error on device ide1(22,0), logical block 22

This patch works fine for me. Please check it.

--- linux/drivers/ide/ide-cd.c.orig Mon May 6 12:38:01 2002
+++ linux/drivers/ide/ide-cd.c Tue May 7 16:43:51 2002
@@ -962,7 +962,7 @@

/* First, figure out if we need to bit-bucket
any of the leading sectors. */
- nskip = MIN(rq->current_nr_sectors - bio_sectors(rq->bio), sectors_to_transfer);
+ nskip = MIN((int)(rq->current_nr_sectors - bio_sectors(rq->bio)), sectors_to_transfer);

while (nskip > 0) {
/* We need to throw away a sector. */

-- 
Osamu Tomita
E-mail: tomita@cinet.co.jp
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