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target: Handle 0 correctly in transport_get_sectors_6()

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commit 9b5cd7f37e upstream.

SBC-3 says:

    A TRANSFER LENGTH field set to zero specifies that 256 logical
    blocks shall be written.  Any other value specifies the number
    of logical blocks that shall be written.

The old code was always just returning the value in the TRANSFER LENGTH
byte.  Fix this to return 256 if the byte is 0.

Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Roland Dreier
2011-11-22 13:51:33 -08:00
committed by Greg Kroah-Hartman
parent 43dd6e6faf
commit 6764359b3a
1 changed files with 7 additions and 2 deletions
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9
drivers/target/target_core_transport.c
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@@ -2562,10 +2562,15 @@ static inline u32 transport_get_sectors_6(
/*
* Everything else assume TYPE_DISK Sector CDB location.
* Use 8-bit sector value.
* Use 8-bit sector value. SBC-3 says:
*
* A TRANSFER LENGTH field set to zero specifies that 256
* logical blocks shall be written. Any other value
* specifies the number of logical blocks that shall be
* written.
*/
type_disk:
return (u32)cdb[4];
return cdb[4] ? : 256;
}
static inline u32 transport_get_sectors_10(