1
linux/drivers
Zhu Yi 5a66926aa9 iwlwifi: delay firmware loading from pci_probe to network interface open
This patch moves the firmware loading (read firmware from disk and load
it into the device SRAM) from pci_probe time to the first network
interface open time. There are two reasons for doing this:

1. To support kernel buildin iwlwifi drivers. Because kernel initializes
   network devices subsystem before hard disk and SATA subsystem, it is
   impossible to get the firmware image from hard disk in the PCI probe
   handler. Thus delaying the firmware loading into the network
   interface open time is the way to go. Note, we only read the firmware
   image from hard disk the first time the interface is open. After this
   is succeeded, we cache the firmware image into the host memory. This
   is a performance gain when user open and close the interface multiple
   times and is necessary for device suspend and resume.

2. For better power saving. When the iwlwifi modules are loaded (or
   buildin the kernel) but the wireless network interface is not being
   used, it is a good practice the wireless device consumes as less
   power as possible. Unloading the firmware from the wireless device
   and unregister the driver's interrupt handler in the network
   interface close handler provides users a way to achieve this. User
   space network configuration tools (i.e NetworkManager) can also
   contribute here when it detects a wired cable is connected and
   close the wireless interface automatically.

This patch also includes the pci_save/restore_state() fixed by Ian Schram
upon the first version.

Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: Ian Schram <ischram@telenet.be>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-01-28 15:09:57 -08:00
..
acorn/char
acpi
amba
ata libata: Change "write_data" to "rw" for some function documentations 2008-01-29 08:48:17 +11:00
atm [ATM]: [he] fixing compilation when you define USE_RBPS_POOL/USE_RBPL_POOL 2008-01-28 15:00:15 -08:00
auxdisplay
base Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2008-01-25 17:19:08 -08:00
block Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6 2008-01-29 08:52:50 +11:00
bluetooth
cdrom Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6 2008-01-29 08:52:50 +11:00
char
clocksource
connector [NETNS]: Consolidate kernel netlink socket destruction. 2008-01-28 15:08:07 -08:00
cpufreq
cpuidle
crypto [S390] crypto: move s390 Kconfig options. 2008-01-26 14:11:17 +01:00
dca
dio
dma
edac
eisa
firewire
firmware
hid HID: ADS/Tech Radio si470x needs blacklist entry 2008-01-28 14:51:23 +01:00
hwmon
i2c Merge branch 'orion' into devel 2008-01-28 13:21:30 +00:00
ide blk_end_request: changing ide-cd (take 4) 2008-01-28 10:37:06 +01:00
ieee1394 Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2008-01-25 17:19:08 -08:00
infiniband [IPV4] drivers/infiniband: Use ipv4_is_<type> 2008-01-28 14:58:17 -08:00
input [ARM] 4737/1: Refactor corgi_lcd to improve readability + bugfix 2008-01-28 13:13:25 +00:00
isdn
kvm
leds
lguest
macintosh i2c: Kill rogue driver IDs 2008-01-27 18:14:47 +01:00
mca
md
media i2c: Drivers stop using the redundant client list 2008-01-27 18:14:51 +01:00
message blk_end_request: changing i2o_block (take 4) 2008-01-28 10:36:50 +01:00
mfd [ARM] Fix class_device damage caused by 0c55445f20 2008-01-28 10:59:09 +00:00
misc
mmc Merge branch 'blk-end-request' of git://git.kernel.dk/linux-2.6-block 2008-01-29 08:51:32 +11:00
mtd
net iwlwifi: delay firmware loading from pci_probe to network interface open 2008-01-28 15:09:57 -08:00
nubus
of
oprofile
parisc [PARISC]: Fix build after ipv4_is_*() changes. 2008-01-28 14:58:20 -08:00
parport
pci
pcmcia [ARM] pxa: move memory controller registers into pxa2xx-regs.h 2008-01-26 15:07:54 +00:00
pnp
power
ps3
rapidio
rtc Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6 2008-01-29 08:52:50 +11:00
s390 [VLAN]: Turn VLAN_DEV_INFO into inline function 2008-01-28 15:08:32 -08:00
sbus
scsi [NETNS]: Consolidate kernel netlink socket destruction. 2008-01-28 15:08:07 -08:00
serial Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6 2008-01-29 08:52:50 +11:00
sh
sn
spi [ARM] pxa: make pxa2xx_spi driver use ssp_request()/ssp_free() 2008-01-26 15:07:52 +00:00
ssb ssb: Add boardflags_hi field to the sprom data structure 2008-01-28 15:09:52 -08:00
tc
telephony
uio
usb Merge branch 'pxa-plat' into devel 2008-01-28 13:21:38 +00:00
video Merge branches 'at91', 'ep93xx', 'iop', 'kprobes', 'ks8695', 'misc', 'msm', 's3c2410', 'sa1100' and 'vfp' into devel 2008-01-28 13:21:21 +00:00
virtio
w1 i2c: normal_i2c can be made const (remaining drivers) 2008-01-27 18:14:47 +01:00
watchdog
xen
zorro
Kconfig
Makefile