len is unsigned, so take care not to subtract below 0.
Signed-off-by: Roel Kluin <roel.kluin@xxxxxxxxx>
---
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index ddfbea4..23447a0 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -916,7 +916,10 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
xferfunc(drive, NULL, ptr, blen);
thislen -= blen;
- len -= blen;
+ if (blen > len)
+ len -= blen;
+ else
+ len = 0;
if (blk_fs_request(rq)) {
rq->buffer += blen;
--
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