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Tony Battersby f8d8e5799b libata: increase 128 KB / cmd limit for ATAPI tape drives 
Commands sent to ATAPI tape drives via the SCSI generic (sg) driver are
limited in the amount of data that they can transfer by the max_sectors
value.  The max_sectors value is currently calculated according to the
command set for disk drives, which doesn't apply to tape drives.  The
default max_sectors value of 256 limits ATAPI tape drive commands to
128 KB.  This patch against 2.6.24-rc1 increases the max_sectors value
for tape drives to 65535, which permits tape drive commands to transfer
just under 32 MB.

Tested with a SuperMicro PDSME motherboard, AHCI, and a Sony SDX-570V
SATA tape drive.

Note that some of the chipset drivers also set their own max_sectors
value, which may override the value set in libata-core.  I don't have
any of these chipsets to test, so I didn't go messing with them.  Also,
ATAPI devices other than tape drives may benefit from similar changes,
but I have only tape drives and disk drives to test.

Signed-off-by: Tony Battersby <tonyb@cybernetics.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-11-03 08:46:54 -04:00
..
acorn/char unicode diacritics support 2007-10-17 08:42:52 -07:00
acpi Pull documentation into release branch 2007-10-29 17:31:01 -04:00
amba Driver core: change add_uevent_var to use a struct 2007-10-12 14:51:01 -07:00
ata libata: increase 128 KB / cmd limit for ATAPI tape drives 2007-11-03 08:46:54 -04:00
atm Eliminate pointless casts from void* in a few driver irq handlers. 2007-10-23 19:53:16 -04:00
auxdisplay
base Revert "Driver core: remove class_device_*_bin_file" 2007-10-31 12:51:29 -07:00
block cciss: update copyright notices 2007-10-29 11:33:05 +01:00
bluetooth [Bluetooth] Add generic driver for Bluetooth USB devices 2007-10-22 02:59:46 -07:00
cdrom SG: audit of drivers that use blk_rq_map_sg() 2007-10-24 13:21:21 +02:00
char x86 gart: rename CONFIG_IOMMU to CONFIG_GART_IOMMU 2007-10-30 00:22:22 +01:00
clocksource
connector [CONNECTOR]: Fix a spurious kfree_skb() call 2007-10-30 21:29:47 -07:00
cpufreq Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6 2007-10-12 15:49:37 -07:00
cpuidle cpuidle: remove unused exports 2007-10-29 17:27:50 -04:00
crypto [CRYPTO] users: Fix up scatterlist conversion errors 2007-10-27 00:52:07 -07:00
dca I/OAT: Add DCA services 2007-10-16 09:43:09 -07:00
dio
dma Remove bogus default y for DMAR and NET_DMA 2007-10-30 08:06:55 -07:00
edac NULL terminate the pci_device_ids in pasemi_edac 2007-10-19 11:53:56 -07:00
eisa signedness: module_param_array nump argument 2007-10-14 12:41:52 -07:00
firewire firewire: Fix pci resume to not pass in a __be32 config rom. 2007-10-31 19:02:19 +01:00
firmware define global BIT macro 2007-10-19 11:53:42 -07:00
hid HID: Don't access input_dev->private directly 2007-10-31 13:30:35 +01:00
hwmon Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial 2007-10-19 20:36:17 -07:00
i2c typo fixes 2007-10-20 01:34:40 +02:00
ide Merge git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6 2007-10-28 12:03:14 -07:00
ieee1394 ieee1394: ieee1394_transactions.c: remove dead code 2007-10-31 19:02:19 +01:00
infiniband Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband 2007-10-30 15:26:56 -07:00
input Use i8253.c lock for PC speaker on MIPS, too. 2007-11-02 19:39:18 -07:00
isdn [ISDN] capidrv: address two longstanding warnings 2007-10-29 04:45:06 -04:00
kvm Consolidate host virtualization support under Virtualization menu 2007-10-23 15:49:47 +10:00
leds fix typo "sort" -> "short" 2007-10-20 01:55:58 +02:00
lguest lguest: documentation update 2007-10-25 15:02:50 +10:00
macintosh Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial 2007-10-19 20:36:17 -07:00
mca
md x86 merge fallout: uml 2007-10-29 07:41:32 -07:00
media [MEDIA] IVTV: exit_ivtv_i2c() cannot be __devexit 2007-10-31 07:48:21 -07:00
message SG: audit of drivers that use blk_rq_map_sg() 2007-10-24 13:21:21 +02:00
mfd typo fixes 2007-10-20 01:34:40 +02:00
misc fujitsu-laptop.c: remove dead code 2007-10-25 17:43:46 -04:00
mmc [ARM] Fix pxamci regression 2007-10-31 15:21:39 +00:00
mtd Eliminate pointless casts from void* in a few driver irq handlers. 2007-10-23 19:53:16 -04:00
net Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6 2007-11-01 15:07:29 -07:00
nubus
of [SPARC/64]: Consolidate of_register_driver 2007-10-17 21:17:42 -07:00
oprofile
parisc parisc: fix sg_page() fallout 2007-10-23 09:49:31 +02:00
parport [PARPORT] Remove unused 'irq' argument from parport irq functions 2007-10-23 19:53:16 -04:00
pci intel-iommu: Fix array overflow 2007-10-30 08:06:55 -07:00
pcmcia remove asm/bitops.h includes 2007-10-19 11:53:41 -07:00
pnp PNP: add debug message for adding new device 2007-10-17 08:43:04 -07:00
power Merge git://git.infradead.org/battery-2.6 2007-10-22 19:20:52 -07:00
ps3 remove asm/bitops.h includes 2007-10-19 11:53:41 -07:00
rapidio
rtc s3c-rtc: remove unused variable 2007-10-30 08:06:55 -07:00
s390 SG: s390-scsi: missing size parameter in zfcp_address_to_sg() 2007-10-29 09:18:03 +01:00
sbus vfc_dev conversion to mutex: fallout 2007-10-20 15:04:06 -07:00
scsi [ARM] Fix an rpc_defconfig regression 2007-10-31 15:21:35 +00:00
serial serial: fix serial_txx9 console initialization 2007-10-30 08:06:55 -07:00
sh
sn
spi fix abuses of ptrdiff_t 2007-10-29 07:41:33 -07:00
ssb [PATCH] ssb: fix build failure 2007-10-16 21:04:11 -04:00
tc lk201: remove obsolete driver 2007-10-17 08:42:57 -07:00
telephony kconfig: syntax cleanup - drop support for "depends/requires/def_boolean" 2007-10-12 21:20:32 +02:00
uio
usb x86 gart: rename CONFIG_IOMMU to CONFIG_GART_IOMMU 2007-10-30 00:22:22 +01:00
video Kbuild/doc: fix links to Documentation files 2007-10-30 14:26:30 -07:00
virtio Virtio helper routines for a descriptor ringbuffer implementation 2007-10-23 15:49:55 +10:00
w1 Kbuild/doc: fix links to Documentation files 2007-10-30 14:26:30 -07:00
watchdog Merge git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog 2007-11-02 19:36:26 -07:00
xen Add missing newlines to some uses of dev_<level> messages 2007-10-18 14:37:28 -07:00
zorro Convert files to UTF-8 and some cleanups 2007-10-19 23:21:04 +02:00
Kconfig Virtio interface 2007-10-23 15:49:54 +10:00
Makefile Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2007-10-23 16:37:29 -07:00