mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-30 22:26:55 +00:00
Code Issues Releases Wiki Activity
linux-stable/drivers
History
Finn Thain 7398cee4c3 scsi: mac_scsi: Increase PIO/PDMA transfer length threshold 
Some targets introduce delays when handshaking the response to certain
commands. For example, a disk may send a 96-byte response to an INQUIRY
command (or a 24-byte response to a MODE SENSE command) too slowly.

Apparently the first 12 or 14 bytes are handshaked okay but then the system
bus error timeout is reached while transferring the next word.

Since the scsi bus phase hasn't changed, the driver then sets the target
borken flag to prevent further PDMA transfers. The driver also logs the
warning, "switching to slow handshake".

Raise the PDMA threshold to 512 bytes so that PIO transfers will be used
for these commands. This default is sufficiently low that PDMA will still
be used for READ and WRITE commands.

The existing threshold (16 bytes) was chosen more or less at random.
However, best performance requires the threshold to be as low as possible.
Those systems that don't need the PIO workaround at all may benefit from
mac_scsi.setup_use_pdma=1

Cc: Michael Schmitz <schmitzmic@gmail.com>
Cc: stable@vger.kernel.org # v4.14+
Fixes: 3a0f64bfa9 ("mac_scsi: Fix pseudo DMA implementation")
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Tested-by: Stan Johnson <userm57@yahoo.com>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-06-20 15:37:03 -04:00
..
accessibility
acpi One more patch to remove io.h from clk-provider.h. We used to need this 2019-05-16 19:05:35 -07:00
amba amba: tegra-ahb: Mark PM functions as __maybe_unused 2019-05-08 14:40:39 +02:00
android Char/Misc patches for 5.2-rc1 - part 2 2019-05-07 13:39:22 -07:00
ata for-5.2/block-post-20190516 2019-05-16 19:08:15 -07:00
atm
auxdisplay
base More power management updates for 5.2-rc1 2019-05-15 08:46:44 -07:00
bcma
block for-5.2/block-post-20190516 2019-05-16 19:08:15 -07:00
bluetooth Bluetooth: hci_qca: Rename STATE_<flags> to QCA_<flags> 2019-05-05 19:34:00 +02:00
bus ARM: SoC-related driver updates 2019-05-16 09:19:14 -07:00
cdrom
char Some minor cleanups for the IPMI driver. 2019-05-08 10:34:17 -07:00
clk One more patch to remove io.h from clk-provider.h. We used to need this 2019-05-16 19:05:35 -07:00
clocksource Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-05-19 11:11:20 -07:00
connector
counter
cpufreq One more patch to remove io.h from clk-provider.h. We used to need this 2019-05-16 19:05:35 -07:00
cpuidle
crypto ARM: SoC platform updates 2019-05-16 08:31:32 -07:00
dax libnvdimm fixes 5.2-rc1 2019-05-15 18:56:50 -07:00
dca
devfreq
dio
dma dmaengine updates for v5.2-rc1 2019-05-09 08:51:45 -07:00
dma-buf drm i915, amdgpu, nouveau, msm, panfrost, bridge, pl111 fixes 2019-05-16 07:22:42 -07:00
edac * Do not build mpc85_edac as a module (Michael Ellerman) 2019-05-16 11:55:35 -07:00
eisa
extcon Char/Misc patches for 5.2-rc1 - part 2 2019-05-07 13:39:22 -07:00
firewire drivers/firewire/core-iso.c: convert to use vm_map_pages_zero() 2019-05-14 09:47:50 -07:00
firmware Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-05-19 10:58:45 -07:00
fmc
fpga ARM: SoC-related driver updates 2019-05-16 09:19:14 -07:00
fsi
gnss Char/Misc patches for 5.2-rc1 - part 2 2019-05-07 13:39:22 -07:00
gpio Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-05-19 10:58:45 -07:00
gpu One more patch to remove io.h from clk-provider.h. We used to need this 2019-05-16 19:05:35 -07:00
hid treewide: prefix header search paths with $(srctree)/ 2019-05-18 11:49:57 +09:00
hsi
hv
hwmon Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 2019-05-16 16:16:18 -07:00
hwspinlock
hwtracing Char/Misc patches for 5.2-rc1 - part 2 2019-05-07 13:39:22 -07:00
i2c i2c: core: add device-managed version of i2c_new_dummy 2019-05-17 19:29:40 +02:00
i3c * Fix a shift wrap bug in the core 2019-05-07 08:50:40 -07:00
ide ide: officially deprecated the legacy IDE driver 2019-05-08 16:47:23 -07:00
idle
iio power supply and reset changes for the v5.2 series 2019-05-15 18:50:40 -07:00
infiniband scsi: RDMA/srp: Fix a sleep-in-invalid-context bug 2019-06-20 15:37:02 -04:00
input ARM: SoC platform updates 2019-05-16 08:31:32 -07:00
interconnect
iommu Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-05-19 10:58:45 -07:00
ipack
irqchip Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-05-19 10:58:45 -07:00
isdn Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2019-05-07 22:03:58 -07:00
leds - Core Frameworks 2019-05-14 10:39:08 -07:00
lightnvm lightnvm: pblk: use nvm_rq_to_ppa_list() 2019-05-06 10:19:19 -06:00
macintosh
mailbox One more patch to remove io.h from clk-provider.h. We used to need this 2019-05-16 19:05:35 -07:00
mcb
md - Improve DM snapshot target's scalability by using finer grained 2019-05-16 15:55:48 -07:00
media media: prefix header search paths with $(srctree)/ 2019-05-18 11:49:56 +09:00
memory One more patch to remove io.h from clk-provider.h. We used to need this 2019-05-16 19:05:35 -07:00
memstick MMC core: 2019-05-07 12:56:19 -07:00
message scsi: message: fusion: Use kmemdup instead of memcpy and kmalloc 2019-06-18 19:46:24 -04:00
mfd One more patch to remove io.h from clk-provider.h. We used to need this 2019-05-16 19:05:35 -07:00
misc Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-05-19 11:11:20 -07:00
mmc One more patch to remove io.h from clk-provider.h. We used to need this 2019-05-16 19:05:35 -07:00
mtd treewide: replace #include <asm/sizes.h> with #include <linux/sizes.h> 2019-05-14 19:52:52 -07:00
mux
net treewide: prefix header search paths with $(srctree)/ 2019-05-18 11:49:57 +09:00
nfc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2019-05-07 22:03:58 -07:00
ntb
nubus
nvdimm libnvdimm fixes 5.2-rc1 2019-05-15 18:56:50 -07:00
nvme for-5.2/block-post-20190516 2019-05-16 19:08:15 -07:00
nvmem ARM: SoC-related driver updates 2019-05-16 09:19:14 -07:00
of of_net: Fix missing of_find_device_by_node ref count drop 2019-05-13 08:52:37 -07:00
opp
oprofile
parisc parisc: Skip registering LED when running in QEMU 2019-05-03 23:47:39 +02:00
parport DMA mapping updates for 5.2 2019-05-09 08:40:55 -07:00
pci pci-v5.2-changes 2019-05-14 10:30:10 -07:00
pcmcia treewide: replace #include <asm/sizes.h> with #include <linux/sizes.h> 2019-05-14 19:52:52 -07:00
perf
phy USB/PHY patches for 5.2-rc1 2019-05-08 10:03:52 -07:00
pinctrl - Core Frameworks 2019-05-14 10:39:08 -07:00
platform - Core Frameworks 2019-05-14 10:39:08 -07:00
pnp
power power supply and reset changes for the v5.2 series 2019-05-15 18:50:40 -07:00
powercap
pps pps: pps-gpio PPS ECHO implementation 2019-05-14 19:52:51 -07:00
ps3
ptp ptp_qoriq: fix NULL access if ptp dt node missing 2019-05-09 09:19:26 -07:00
pwm Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-05-19 11:11:20 -07:00
rapidio rapidio: fix a NULL pointer dereference when create_workqueue() fails 2019-05-14 19:52:50 -07:00
ras
regulator Merge branch 'regulator-5.2' into regulator-next 2019-05-06 22:52:14 +09:00
remoteproc
reset ARM: SoC-related driver updates 2019-05-16 09:19:14 -07:00
rpmsg
rtc ARM: SoC-related driver updates 2019-05-16 09:19:14 -07:00
s390 s390 updates for the 5.2 merge window #2 2019-05-17 10:08:59 -07:00
sbus mm/gup: change GUP fast to use flags rather than a write 'bool' 2019-05-14 09:47:46 -07:00
scsi scsi: mac_scsi: Increase PIO/PDMA transfer length threshold 2019-06-20 15:37:03 -04:00
sfi
sh treewide: replace #include <asm/sizes.h> with #include <linux/sizes.h> 2019-05-14 19:52:52 -07:00
siox
slimbus
sn
soc Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-05-19 10:58:45 -07:00
soundwire
spi ARM: SoC-related driver updates 2019-05-16 09:19:14 -07:00
spmi
ssb Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2019-05-07 22:03:58 -07:00
staging media updates for v5.2-rc1 2019-05-16 11:57:16 -07:00
target scsi: tcmu: Simplify tcmu_update_uio_info() 2019-06-20 15:37:02 -04:00
tc
tee ARM: SoC-related driver updates 2019-05-16 09:19:14 -07:00
thermal Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 2019-05-16 16:16:18 -07:00
thunderbolt Char/Misc patches for 5.2-rc1 - part 2 2019-05-07 13:39:22 -07:00
tty RISC-V Patches for the 5.2 Merge Window, Part 1 v3 2019-05-19 09:56:36 -07:00
uio
usb treewide: prefix header search paths with $(srctree)/ 2019-05-18 11:49:57 +09:00
uwb
vfio mm/gup: change GUP fast to use flags rather than a write 'bool' 2019-05-14 09:47:46 -07:00
vhost virtio: fixes, features 2019-05-14 14:12:59 -07:00
video fbdev/efifb: Ignore framebuffer memmap entries that lack any memory types 2019-05-17 11:07:42 +02:00
virt drivers/virt/fsl_hypervisor.c: prevent integer overflow in ioctl 2019-05-14 19:52:52 -07:00
virtio virtio/virtio_ring: do some comment fixes 2019-05-12 13:11:35 -04:00
visorbus
vlynq
vme
w1 Char/Misc patches for 5.2-rc1 - part 2 2019-05-07 13:39:22 -07:00
watchdog ARM: SoC platform updates 2019-05-16 08:31:32 -07:00
xen xen: fixes and features for 5.2-rc1 2019-05-15 18:44:52 -07:00
zorro
Kconfig
Makefile