patch-2.1.126 linux/include/linux/blk.h

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diff -u --recursive --new-file v2.1.125/linux/include/linux/blk.h linux/include/linux/blk.h
@@ -147,13 +147,13 @@
 #define DEVICE_ON(device)
 #define DEVICE_OFF(device)
 
-#elif (MAJOR_NR == SCSI_DISK_MAJOR)
+#elif (SCSI_DISK_MAJOR(MAJOR_NR))
 
 #define DEVICE_NAME "scsidisk"
 #define DEVICE_INTR do_sd  
 #define TIMEOUT_VALUE (2*HZ)
 #define DEVICE_REQUEST do_sd_request
-#define DEVICE_NR(device) (MINOR(device) >> 4)
+#define DEVICE_NR(device) (((MAJOR(device) & SD_MAJOR_MASK) << (8 - 4)) + (MINOR(device) >> 4))
 #define DEVICE_ON(device)
 #define DEVICE_OFF(device)
 

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