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ide-atapi: compute cmd_len based on device type in ide_transfer_pc 

There should be no functionality change resulting from this patch.

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
[bart: move cmd_len check closer to ->output_data() call]
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Borislav Petkov 2009-01-02 16:12:54 +01:00 committed by Bartlomiej Zolnierkiewicz
parent 5317464dcc
commit 8c662852d1
1 changed files with 13 additions and 1 deletions
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14
drivers/ide/ide-atapi.c
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@ -15,6 +15,8 @@
#define debug_log(fmt, args...) do {} while (0)
#endif
#define ATAPI_MIN_CDB_BYTES 12
static inline int dev_is_idecd(ide_drive_t *drive)
{
return drive->media == ide_cdrom || drive->media == ide_optical;
@ -492,6 +494,7 @@ static ide_startstop_t ide_transfer_pc(ide_drive_t *drive)
struct request *rq = hwif->hwgroup->rq;
ide_expiry_t *expiry;
unsigned int timeout;
int cmd_len;
ide_startstop_t startstop;
u8 ireason;
@ -513,9 +516,18 @@ static ide_startstop_t ide_transfer_pc(ide_drive_t *drive)
if ((ireason & ATAPI_COD) == 0 || (ireason & ATAPI_IO)) {
printk(KERN_ERR "%s: (IO,CoD) != (0,1) while issuing "
"a packet command\n", drive->name);
return ide_do_reset(drive);
}
if (dev_is_idecd(drive)) {
/* ATAPI commands get padded out to 12 bytes minimum */
cmd_len = COMMAND_SIZE(rq->cmd[0]);
if (cmd_len < ATAPI_MIN_CDB_BYTES)
cmd_len = ATAPI_MIN_CDB_BYTES;
} else
cmd_len = ATAPI_MIN_CDB_BYTES;
/*
* If necessary schedule the packet transfer to occur 'timeout'
* miliseconds later in ide_delayed_transfer_pc() after the device
@ -541,7 +553,7 @@ static ide_startstop_t ide_transfer_pc(ide_drive_t *drive)
/* Send the actual packet */
if ((drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) == 0)
hwif->tp_ops->output_data(drive, NULL, rq->cmd, 12);
hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len);
return ide_started;
}