aboutsummaryrefslogtreecommitdiff
path: root/drivers/usb/host
AgeCommit message (Collapse)Author
2008-06-11USB: isp1760: Assign resource fields before adding hcdNate Case
This fixes the bogus "io mem 0x00000000" message printed during driver init due to hcd->rsrc_start being assigned after the call to usb_add_hcd(). Signed-off-by: Nate Case <ncase@xes-inc.com> Acked-by: Sebastian Siewior <bigeasy@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-06-09usb: r8a66597-hcd: Add support for SH7723 USB hostYoshihiro Shimoda
R8A66597 is similar to SH7723 USB 2.0 Host/Function module. In addition, the USB of SH7366 is compatible with SH7723. It can support SH7723 USB host by changing Kconfig. Signed-off-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-06-04isp1760-if iomem annotationsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-05-29Revert "USB: EHCI: fix performance regression"Greg Kroah-Hartman
This reverts commit fa38dfcc56b5f6cce787f9aaa5d1830509213802. It wasn't really a regression and David and Alan are still working through the issues reported. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-05-29USB: EHCI: fix performance regressionAlan Stern
This patch (as1099) fixes a performance regression in ehci-hcd. The fundamental problem is that queue headers get removed from the schedule too quickly, since the code checks for a counter advancing rather than making an actual time-based check. The latency involved in removing the queue header and then relinking it can severely degrade certain kinds of workloads. The patch replaces a simple counter with a timestamp derived from the controller's uframe value. In addition, the delay for unlinking an idle queue header is increased from 5 ms to 10 ms; since some controllers (nVidia) have a latency of up to 1 ms for unlinking, this reduces the relative impact from 20% to 10%. Finally, a logical error left over from the IAA watchdog-timer conversion is corrected. Now the driver will always either unlink an idle queue header or set up a timer to unlink it later. The old code would sometimes fail to do either. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Cc: David Brownell <david-b@pacbell.net> Cc: Leonid <leonidv11@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-05-29USB: EHCI: fix bug in Iso schedulingAlan Stern
This patch (as1098) changes the way ehci-hcd schedules its periodic Iso transfers. That the current scheduling code is wrong is clear on the face of it: Sometimes it returns -EL2NSYNC (meaning that an URB couldn't be scheduled because it was submitted too late), but it does this even when the URB_ISO_ASAP flag is set (meaning the URB should be scheduled as soon as possible). The new code properly implements as-soon-as-possible scheduling, assigning the next unexpired slot as the URB's starting point. It also is more careful about checking for Iso URB completion: It doesn't bother to check for activity during frames that are already over, and it allows for the possibility that some of the URB's packets may have raced the hardware when they were submitted and so never got used (the packet status is set to -EXDEV). This fixes problems several people have experienced with USB video applications. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-05-29USB: EHCI: fix remote-wakeup regressionAlan Stern
This patch (as1097) fixes a bug in the remote-wakeup handling in ehci-hcd. The driver currently does not keep track of whether the change-suspend feature is enabled for each port; the feature is automatically reset the first time it is read. But recent changes to the hub driver require that the feature be read at least twice in order to work properly. A bit-vector is added for storing the change-suspend feature values. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-05-29USB: EHCI: suppress unwanted error messagesAlan Stern
This patch (as1096) fixes an annoying problem: When a full-speed or low-speed device is plugged into an EHCI controller, it fails to enumerate at high speed and then is handed over to the companion controller. But usbcore logs a misleading and unwanted error message when the high-speed enumeration fails. The patch adds a new HCD method, port_handed_over, which asks whether a port has been handed over to a companion controller. If it has, the error message is suppressed. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: David Brownell <david-b@pacbell.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-05-29USB: EHCI: fix up root-hub TT messAlan Stern
This patch (as1095) cleans up the HCD glue and several of the EHCI bus-glue files. The ehci->is_tdi_rh_tt flag is redundant, since it means the same thing as the hcd->has_tt flag, so it is removed and the other flag used in its place. Some of the bus-glue files didn't get the relinquish_port method added to their hc_driver structures. Although that routine currently doesn't do anything for controllers with an integrated TT, in the future it might. So the patch adds it where it is missing. Lastly, some of the bus-glue files have erroneous entries for their hc_driver's suspend and resume methods. These method pointers are specific to PCI and shouldn't be used otherwise. (The patch also includes an invisible whitespace fix.) Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Acked-by: David Brownell <dbrownell@users.sourceforge.net>
2008-05-20USB: ehci-orion: the Orion EHCI root hub does have a Transaction TranslatorLennert Buytenhek
Commit 7329e211b987a493cbcfca0e98c60eb108ab42df ("USB: root hubs don't lie about their number of TTs") requires the various platform EHCI glue modules to set ->has_tt if the root hub has a Transaction Translator. The Orion EHCI root hub does have a Transaction Translator, so set ->has_tt in ehci_orion_setup(). This fixes oopsing on plugging in a low speed device. Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Acked-by: Nicolas Pitre <nico@marvell.com> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-05-14usb: fix compile warning in isp1760Sebastian Siewior
drivers/usb/host/isp1760-if.c:275: warning: 'ret' is used uninitialized in this function Signed-off-by: Sebastian Siewior <bigeasy@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-05-14usb: fix integer as NULL pointer warnings found by sparseHarvey Harrison
drivers/usb/host/ohci-sm501.c:93:24: warning: Using plain integer as NULL pointer drivers/usb/gadget/amd5536udc.c:3254:9: warning: Using plain integer as NULL pointer drivers/usb/gadget/amd5536udc.c:3267:9: warning: Using plain integer as NULL pointer drivers/usb/gadget/amd5536udc.c:3277:9: warning: Using plain integer as NULL pointer drivers/usb/gadget/amd5536udc.c:3285:9: warning: Using plain integer as NULL pointer drivers/usb/gadget/amd5536udc.c:3293:9: warning: Using plain integer as NULL pointer Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-05-14USB: isp1760: fix printk formatRandy Dunlap
Fix printk format warnings in isp1760 (in linux-next): next-20080430/drivers/usb/host/isp1760-hcd.c:994: warning: format '%d' expects type 'int', but argument 6 has type 'size_t' next-20080430/drivers/usb/host/isp1760-hcd.c:1092: warning: format '%d' expects type 'int', but argument 3 has type 'size_t' Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-05-06usb: Sparc build fix, make USB_ISP1760_OF depend on PPC_OFDavid S. Miller
Sparc doesn't have some of the OF interfaces this driver wants to use. Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-05-02USB: UHCI: disable remote wakeup when it's not neededAlan Stern
This patch (as1084b) fixes the way uhci-hcd handles polling and remote wakeups for its root hubs. When remote wakeup is disabled, neither interrupts nor polling should be enabled during a root-hub suspend. Likewise, if interrupts are enabled during suspend then polling isn't needed. Furthermore the EGSM (Enter Global Suspend Mode) bit shouldn't be set in the Command register unless remote wakeup is enabled. Apparently some controllers will issue a remote-wakeup interrupt whenever EGSM is on, even if Resume-Detect interrupts are supposedly disabled. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-05-02USB: OHCI: work around bogus compiler warningAlan Stern
The patch (as1086) works around a bogus "uninitialized variable" warning generated by some versions of GCC. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-05-02USB: add Cypress c67x00 OTG controller HCD driverPeter Korsgaard
This patch adds HCD support for the Cypress c67x00 family of devices. Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-05-02USB: ISP1760 HCD driverSebastian Siewior
This driver has been written from scratch and supports the ISP1760. ISP1761 might (should) work as well but the OTG isn't supported. Also ISO packets are not. However, it works on my little PowerPC board. Signed-off-by: Sebastian Siewior <bigeasy@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-29usb: use get/put_unaligned_* helpersHarvey Harrison
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: David Brownell <dbrownell@users.sourceforge.net> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29usb: use non-racy method for proc entries creationDenis V. Lunev
Use proc_create()/proc_create_data() to make sure that ->proc_fops and ->data be setup before gluing PDE to main tree. Signed-off-by: Denis V. Lunev <den@openvz.org> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-28drivers/usb annotations and fixesAl Viro
* endianness annotations * endianness fixes * missing get_unaligned/put_unaligned It's pretty much all over the place, changes to different files are independent. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Serial-parts-Acked-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-24USB: replace remaining __FUNCTION__ occurrencesHarvey Harrison
__FUNCTION__ is gcc-specific, use __func__ Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24USB: fix compile problems in ehci-hcdAlan Stern
This patch (as1072) fixes some recently-introduced compile problems that show up in ehci-hcd when CONFIG_PM is turned off. PORT_WAKE_BITS needs to be defined always. ehci_port_power() is called during initialization by all the EHCI variants other than the PCI version, in which it is "defined but not used". So add a call to it. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24USB: ehci: qh_completions cleanup and bugfixDavid Brownell
Simplify processing of completed qtds, and correct handling of short reads, by removing two state variables: - "qtd_status" wasn't needed. The current URB's status is either OK (-EINPROGRESS) or some fault status. Once a fault appears, the queue halts and any later QTDs are immediately removed, so no temporary status is needed. (Or for typical short reads, it's not treated as a fault, so no queue halt is needed.) - "do_status" was erroneous. Because of how the queue is set up, short control reads can (and should!) be treated like full size reads, and cleaned up the usual way. The status stage will be executed transparently, and usbcore handles the choice of whether to report this status as unexected. The "do_status" problem caused a rather perplexing timing-dependent problem with usbtest case 10. Sometimes it would make the controller skip a dozen transactions while (wrongly) trying to clean up after a short transfer. Fortunately, removing a dcache contention issue made this become trivial to reproduce (on one test rig), so enough clues finally presented themselves ... I think this has been around for a very long time, but was worsened by recent urb->status changes. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24USB: don't explicitly reenable root-hub status interruptsAlan Stern
This patch (as1069b) changes the way OHCI root-hub status-change interrupts are enabled. Currently a special HCD method, hub_irq_enable(), is called when the hub driver is finished using a root hub. This approach turns out to be subject to races, resulting in unnecessary polling. The patch does away with the method entirely. Instead, the driver automatically enables the RHSC interrupt when no more status changes are present. This scheme is safe with controllers using level-triggered semantics for their interrupt flags. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24USB: OHCI: turn off RD when remote wakeup is disabledAlan Stern
This patch (as1068b) disables the RD interrupt flag when an OHCI root hub is suspended with remote wakeup disabled. Although the spec clearly states that this flag permits the controller to issue an interrupt when a resume request from downstream is detected and not when a local status change occurs, some controllers mistakenly use it for both types of event. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24USB: HCDs use the do_remote_wakeup flagAlan Stern
When a USB device is suspended, whether or not it is enabled for remote wakeup depends on the device_may_wakeup() setting. The setting is then saved in the do_remote_wakeup flag. Later on, however, the device_may_wakeup() value can change because of user activity. So when testing whether a suspended device is or should be enabled for remote wakeup, we should always test do_remote_wakeup instead of device_may_wakeup(). This patch (as1076) makes that change for root hubs in several places. The patch also adjusts uhci-hcd so that when an autostopped controller is suspended, the remote wakeup setting agrees with the value recorded in the root hub's do_remote_wakeup flag. And the patch adjusts ehci-hcd so that wakeup events on selectively suspended ports (i.e., the bus itself isn't suspended) don't turn on the PME# wakeup signal. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24USB: ehci: qh/qtd cleanup commentsDavid Brownell
Provide better comments about qh_completions() and QTD handling. That code can be *VERY* confusing, since it's evolved over a few years to cope with both hardware races and silicon quirks. Remove two unlikely() annotations that match the GCC defaults (and are thus pointless); add an "else" to highlight code flow. This patch doesn't change driver behavior. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24USB: r8a66597-hcd: Add support for SH7366 USB hostYoshihiro Shimoda
R8A66597 is similar to SH7366 USB 2.0 Host/Function module. It can support SH7366 USB host by changing several R8A66597 code. Signed-off-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24USB: r8a66597-hcd: fix usb device connection timingYoshihiro Shimoda
Fix the problem that enumeration of a USB device was slow. Signed-off-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24USB: r8a66597-hcd: fix interrupt transfer intervalYoshihiro Shimoda
This driver ignored the value of bInterval and revised the problem that performed interrupt transfer. ASIX USB Ethernet adapter comes to work with this host controller by applying this patch. Signed-off-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24USB: ehci shutdown refactoredSarah Sharp
This patch refactors some shutdown code so it can be shared between ehci_stop() and ehci_shutdown(). This also fixes a couple potential bugs: - ehci_shutdown() was not locking ehci->lock before halting the HC. - ehci_shutdown() didn't disable the watchdog and IAA timers. - ehci_stop() was resetting the host controller when it may have been running, which the EHCI spec says "may result in undefined behavior". ehci_stop() was calling port_power() to turn off the ports, which waited 20ms after applying the port change. The msleep was for the case where the HC might take 20ms to turn the ports on; since we're shutting them off, we can avoid the msleep and just use ehci_turn_off_ports(). ehci_stop() doesn't need to clear the intr_enable register or revert ownership of the companion controllers to the BIOS, because the host controller reset should have done that. There might be a buggy host controller that doesn't follow the reset rules, but for now we assume it's redundant code and remove it. [ A subsequent patch will cancel the timers later ... this version carries forward existing bugs where timers could get re-armed after they're canceled. ] Signed-off-by: Sarah Sharp <sarah.a.sharp@intel.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24USB: OHCI: host-controller resumes leave root hub suspendedAlan Stern
Drivers in the ohci-hcd family should perform certain tasks whenever their controller device is resumed. These include checking for loss of power during suspend, turning on port power, and enabling interrupt requests. Until now these jobs have been carried out when the root hub is resumed, not when the controller is. Many drivers work around the resulting awkwardness by automatically resuming their root hub whenever the controller is resumed. But this is wasteful and unnecessary. To simplify the situation, this patch (as1066) adds a new core routine, ohci_finish_controller_resume(), which can be used by all the OHCI-variant drivers. They can call the new routine instead of resuming their root hubs. And ohci-pci.c can call it instead of using its own special-purpose handler. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24USB: clarify usage of hcd->suspend/resume methodsAlan Stern
The .suspend and .resume method pointers in struct usb_hcd have not been fully understood by host-controller driver writers. They are meant for use with PCI controllers; other platform-specific drivers generally should not refer to them. To try and clarify matters, this patch (as1065) renames those methods to .pci_suspend and .pci_resume. It eliminates corresponding dead code and bogus references in the ohci-ssb and u132-hcd drivers. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24USB: root hubs don't lie about their number of TTsAlan Stern
Currently EHCI root hubs enumerate with a bDeviceProtocol code indicating that they possess a Transaction Translator. However the vast majority of controllers do not; they rely on a companion controller to handle full- and low-speed communications. This patch (as1064) changes the root-hub device descriptor to match the actual situation. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24USB: OHCI: fix bug in controller resumeAlan Stern
This patch (as1063) fixes a bug in the way ohci-hcd resumes its controllers. It leaves the Master Interrupt Enable bit turned off. If the root hub is resumed immediately this won't matter. But if the root hub is suspended (say because no devices are plugged in), it won't ever wake up by itself. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: David Brownell <david-b@pacbell.net> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24USB: test for NULL return from platform_get_resource() in ↵Jesper Juhl
ohci_hcd_sm501_drv_remove() platform_get_resource() may return null, so although it seems it will never do so here unless there's a bug elsewhere, it does no harm to be defensive and test. Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Acked-by: Magnus Damm <magnus.damm@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24usb: u132-hcd driver: semaphore to mutexDaniel Walker
Signed-off-by: Daniel Walker <dwalker@mvista.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24usb: u132-hcd driver style clean upDaniel Walker
I was converting a semaphore in this file to a mutex when I noticed that this file has some fairly rampant style problems. Practically every line has spaces instead of tabs .. Once I cleared that up, checkpatch.pl showed a number of other problem.. I think this file might be a good one to review for new style checks that could be added.. Below are the only two remaining which I didn't remove. #5083: FILE: drivers/usb/host/u132-hcd.c:2907: + error: WARNING: labels should not be indented #5087: FILE: drivers/usb/host/u132-hcd.c:2911: + stall: These labels are actually inside a switch statement, and they are right under "default:". "default:" appears to be exempt and these other label should be too, or default shouldn't be exempt. I also deleted a few lines due to single statements inside { } , if (is_error()) { return; } becomes, if (is_error()) return; with one line deleted. Signed-off-by: Daniel Walker <dwalker@mvista.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24USB: Remove EXPERIMENTAL designation from USB_EHCI_ROOT_HUB_TT.Robert P. J. Day
According to David Brownell, this feature doesn't require an experimental designation any longer. Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24USB: ehci: paranoia, reject large control transfersDavid Brownell
Some EHCI fault paths with large control transfers aren't coded. Avoid problems by rejecting transfers that may need two qTDs (16+ KB). This is mostly paranoia; even 4 KB transfers are rare, and most HCDs use lower limits (so it's unlikely anyone would ever try such a thing). Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24USB: remove dev->power.power_stateAlan Stern
power.power_state is scheduled for removal. This patch (as1053) removes all uses of that field from drivers/usb. Almost all of them were write-only, the most significant exceptions being sl811-hcd.c and u132-hcd.c. Part of this patch was written by Pavel Machek. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Cc: David Brownell <david-b@pacbell.net> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24USB: ehci: remove obsolete workaround for bogus IRQsDavid Brownell
It was pointed out that we found and fixed the cause of the "bogus" fatal IRQ reports some time ago ... this patch removes the code which was working around that bug ("status" got clobbered), and a comment which needlessly confused folk reading this code. This also includes a minor cleanup to the code which fixed that bug. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24USB: use DIV_ROUND_UPJulia Lawall
The kernel.h macro DIV_ROUND_UP performs the computation (((n) + (d) - 1) / (d)) but is perhaps more readable. An extract of the semantic patch that makes this change is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @haskernel@ @@ #include <linux/kernel.h> @depends on haskernel@ expression n,d; @@ ( - (n + d - 1) / d + DIV_ROUND_UP(n,d) | - (n + (d - 1)) / d + DIV_ROUND_UP(n,d) ) @depends on haskernel@ expression n,d; @@ - DIV_ROUND_UP((n),d) + DIV_ROUND_UP(n,d) @depends on haskernel@ expression n,d; @@ - DIV_ROUND_UP(n,(d)) + DIV_ROUND_UP(n,d) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24USB: minor ehci xITD simplificationsKarsten Wiese
Remove two (or one) conditional tests in per-urb isochronous transfer setup code paths. Signed-off-by: Karsten Wiese <fzu@wemgehoertderstaat.de> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24USB: EHCI: Refactor "if (handshake()) state = HC_STATE_HALT"Karsten Wiese
Refactor the EHCI "if (handshake()) state = HC_STATE_HALT" idiom, which appears 4 times, by replacing it with calls to a new function called handshake_on_error_set_halt(). Saves a few bytes too. Signed-off-by: Karsten Wiese <fzu@wemgehoertderstaat.de> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24USB: ehci minor SOC bus glue fixesDavid Brownell
Various minor fixes to some SOC bus glue for EHCI: - Remove a bogus copyright (by "me"!) which someone added to the FSL driver, and an irrelevant comment. - Un-break MODULE_ALIAS() directives after platform_bus hotplugging acquired a backwards-incompatible change. (Which didn't fix ANY of the in-tree drivers it prevented from hotplugging -- sigh.) - Remove some bogus assignments of platform_bus_type; that's done by the platform_bus code. - Add some FIXMEs for drivers with that pointless two-level idiom for probe() and remove() routines. ("Obfuscation" is a non-goal.) That should help avoid future bus glue which copies that idiom. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24USB: ehci tolerates some buggy devicesDavid Brownell
This teaches EHCI how to to work around bugs in certain high speed devices, by accomodating "bulk" packets that exceed the 512 byte constant value required by the USB 2.0 specification. (Have a look at section 5.8.3, paragraphs 1 and 3.) It also makes the descriptor parsing code warn when it encounters such bugs. (We've had reports of maybe two or three such devices, all pretty recent.) Such devices are nonconformant. The proper fix is have the vendors of those devices do the simple, obvious, and correct thing ... which will let them be used with USB hosts that don't have workarounds for this particular vendor bug. But unless/until they do, we can at least have one of the high speed HCDs work with such buggy devices. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24USB: ohci: port reset paranoia timeoutDavid Brownell
This limits how long the OHCI port reset loop waits for the hardware to do its job, if the controller either (a) dies, or (b) can't finish the reset. Such limits are always a good idea. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-04-24USB: ehci: minor cleanupsDavid Brownell
Minor cleanups to the EHCI code: revision history is what source code repositories should have. Switch to a more standard way to kick in verbose debugging -- don't be EHCI-specific. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>