[PATCH] Permit READ_BUFFER_CAPACITY in SG_IO command table

[Daniel Drake]

Hi,

While burning CD's on 2.6.9 with cdrdao, I noticed it complaining repeatedly:
 ERROR: Read buffer capacity failed.

It tries to read the buffer capacity (MMC command 0x5c) in order to produce a 
percentage reading of how full the buffer is.

This patch permits the READ_BUFFER_CAPACITY command again. Please apply.

Signed-off-by: Daniel Drake <dsd@xxxxxxxxxx>
diff -X dontdiff -urNp linux-2.6.9-gentoo-r2/drivers/block/scsi_ioctl.c linux-dsd/drivers/block/scsi_ioctl.c
--- linux-2.6.9-gentoo-r2/drivers/block/scsi_ioctl.c	2004-11-03 21:26:28.000000000 +0000
+++ linux-dsd/drivers/block/scsi_ioctl.c	2004-11-03 22:05:07.635578808 +0000
@@ -139,6 +139,7 @@ static int verify_command(struct file *f
 		safe_for_read(GPCMD_PAUSE_RESUME),
 
 		/* CD/DVD data reading */
+		safe_for_read(GPCMD_READ_BUFFER_CAPACITY),
 		safe_for_read(GPCMD_READ_CD),
 		safe_for_read(GPCMD_READ_CD_MSF),
 		safe_for_read(GPCMD_READ_DISC_INFO),
diff -X dontdiff -urNp linux-2.6.9-gentoo-r2/include/linux/cdrom.h linux-dsd/include/linux/cdrom.h
--- linux-2.6.9-gentoo-r2/include/linux/cdrom.h	2004-11-03 17:08:47.000000000 +0000
+++ linux-dsd/include/linux/cdrom.h	2004-11-03 22:01:15.858814232 +0000
@@ -452,6 +452,7 @@ struct cdrom_generic_command
 #define GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL  0x1e
 #define GPCMD_READ_10			    0x28
 #define GPCMD_READ_12			    0xa8
+#define GPCMD_READ_BUFFER_CAPACITY	    0x5c
 #define GPCMD_READ_CDVD_CAPACITY	    0x25
 #define GPCMD_READ_CD			    0xbe
 #define GPCMD_READ_CD_MSF		    0xb9