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Permit READ_BUFFER_CAPACITY in SG_IO command table

PATCH In review Daniel Drake 2 participants 2 messages Nov 3, 2004 – Nov 4, 2004

Subsystems (2)
Block layer Uniform cdrom driver
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Daniel Drake

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#0 lore raw

PATCH 1/1 Permit READ_BUFFER_CAPACITY in SG_IO command table

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 <[email protected]>
drivers/block/scsi_ioctl.c +1 -0
diff -X dontdiff -urNp linux-2.6.9-gentoo-r2/drivers/block/scsi_ioctl.c linux-dsd/drivers/block/scsi_ioctl.c
@@ -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),
include/linux/cdrom.h +1 -0
diff -X dontdiff -urNp linux-2.6.9-gentoo-r2/include/linux/cdrom.h linux-dsd/include/linux/cdrom.h
@@ -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
#1 lore raw
Quoted 11 lines · 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 <[email protected]>

Looks fine, thanks!

Signature · 1 line
Jens Axboe