[PATCH 2.6.20-rc3] fix broken retval test in sr_block_ioctl

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With recent kernels (and possibly much older ones, too),
ioctl() calls for ATAPI devices never make it to the driver layers.

The reason for this is a borked return code test in drivers/scsi/sr.c.
This patch fixes it.

Signed-off-by:  Mark Lord <mlord@xxxxxxxxx>

---
--- old/drivers/scsi/sr.c	2006-11-29 16:57:37.000000000 -0500
+++ linux/drivers/scsi/sr.c	2007-01-02 16:40:33.000000000 -0500
@@ -468,7 +468,7 @@
 	}
 
 	ret = cdrom_ioctl(file, &cd->cdi, inode, cmd, arg);
-	if (ret != ENOSYS)
+	if (ret != -ENOSYS)
 		return ret;
 
 	/*
-
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