Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=8c6628...
Commit: 8c662852d1aa35ed370942ef2740759cd334d2d5
Parent: 5317464dccd0c03026d60f1e9968de4f9cd23f69
Author: Borislav Petkov <petkovbb@googlemail.com>
AuthorDate: Fri Jan 2 16:12:54 2009 +0100
Committer: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
CommitDate: Fri Jan 2 16:12:54 2009 +0100
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>
---
drivers/ide/ide-atapi.c | 14 +++++++++++++-
1 files changed, 13 insertions(+), 1 deletions(-)
diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
index d412bd2..5fdcb95 100644
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -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;
}
--
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