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* potential compiler error, irqfunc caller sites updateYoann Padioleau2007-07-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In 7d12e780e003f93433d49ce78cfedf4b4c52adc5 David Howells performed this evolution: "IRQ: Maintain regs pointer globally rather than passing to IRQ handlers" He correctly updated many of the function definitions that were using this extra regs pointer parameter but forgot to update some caller sites of those functions. The reason the modifications was not properly done on all drivers is that some drivers were rarely compiled because they are for AMIGA, or that some code sites were inside #ifdefs where the option is not set or inside #if 0. Here is the semantic patch that found the occurences and fixed the problem. @ rule1 @ identifier fn; identifier irq, dev_id; typedef irqreturn_t; @@ static irqreturn_t fn(int irq, void *dev_id) { ... } @@ identifier rule1.fn; expression E1, E2, E3; @@ fn(E1, E2 - ,E3 ) Signed-off-by: Yoann Padioleau <padator@wanadoo.fr> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Garzik <jeff@garzik.org> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'merge' of ↵Linus Torvalds2007-07-05
|\ | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: [POWERPC] Update defconfigs [POWERPC] Uninline and export virq_to_hw() for the pasemi_mac driver [POWERPC] Fix PMI breakage in cbe_cbufreq driver [POWERPC] Disable old EMAC driver in arch/powerpc
| * [POWERPC] Disable old EMAC driver in arch/powerpcDavid Gibson2007-07-01
| | | | | | | | | | | | | | | | | | | | | | | | The EMAC driver, in drivers/net/ibm_emac, for the embedded Ethernet MAC found in PowerPC 4xx embedded chips is not suitable for arch/powerpc. It will not build because it relies on the old arch/ppc OCP mechanism. BenH has a new, device-tree aware version of the driver which will work in arch/powerpc, but until it's merged, this patch will disable the old, non-building version. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | Merge branch 'for-linus' of ↵Linus Torvalds2007-07-03
|\ \ | | | | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband * 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband: IPoIB/cm: Partial error clean up unmaps wrong address mlx4_core: Add new Mellanox device IDs
| * | mlx4_core: Add new Mellanox device IDsJack Morgenstein2007-07-02
| | | | | | | | | | | | | | | | | | | | | Add new IDs for PCIe gen2 devices. Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
* | | 3c589_cs: fix local_bh_enable warningPatrick McHardy2007-07-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Russell King wrote: > Having upgraded from 2.6.16 to 2.6.22-rc6, I'm now seeing the following. > > Looks like netfilter is calling local_bh_enable() with IRQs disabled, > which would appear to be illegal. Thankfully, this is a warn-once > warning. > > WARNING: at /home/rmk/git/linux-2.6-rmk/kernel/softirq.c:138 local_bh_enable() > [...] > [<c01447fc>] (nf_conntrack_destroy+0x0/0x2c) from [<c012c05c>] (__kfree_skb+0xd0/0x100) > [<c012bf8c>] (__kfree_skb+0x0/0x100) from [<c012c0d8>] (kfree_skb+0x4c/0x50) > r5:c12a3800 r4:00000300 > [<c012c08c>] (kfree_skb+0x0/0x50) from [<bf03cbb0>] (el3_start_xmit+0xb8/0xd0 [3c589_cs]) > [<bf03caf8>] (el3_start_xmit+0x0/0xd0 [3c589_cs]) from [<c01324dc>] (dev_hard_start_xmit+0x1a8/0x244) > r7:c12a3800 r6:c1a9aa00 r5:c1a9aa00 r4:c12a3800 > [<c0132334>] (dev_hard_start_xmit+0x0/0x244) from [<c013fcc0>] (__qdisc_run+0xb0/0x198) Thats a bug in the 3c589_cs driver. Patch attached. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* | | RESEND [PATCH 3/3] NetXen: Graceful teardown of interface and hardware upon ↵Dhananjay Phadke2007-07-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | module unload Resending patch 3/3 only. These changes allow driver close routine to be called during module unload, to clean-up buffers and other software resources, flush queues etc. Also, hardware is reset to pristine state. Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com> Signed-off-by: Milan Bag <mbag@netxen.com> Signed-off-by: Wen Xiong <wenxiong@us.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* | | drivers/net/ns83820.c: fix a check-after-useAdrian Bunk2007-07-02
| | | | | | | | | | | | | | | | | | | | | This patch fixes a check-after-use spotted by the Coverity checker. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* | | net/usb/cdc_ether minor sparse cleanupDavid Brownell2007-07-02
| | | | | | | | | | | | | | | | | | | | | Remove an "sparse" warning about a shadowed variable name. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* | | RESEND [PATCH 2/3] NetXen: Support per PCI-function interrupt mask registersdhananjay.phadke@gmail.com2007-07-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch updates the various access routines to access different control and status settings present in different register locations. This will fix problems related to working of different ports in multi Port card. Signed-off by: Dhananjay Phadke <dhananjay@netxen.com> Signed-off by: Milan Bag <mbag@netxen.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* | | RESEND [PATCH 1/3] NetXen: Fix issue of MSI not working correctlydhananjay.phadke@gmail.com2007-07-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | NetXen driver uses PCI function 0 to provide the functionality of MSI. The patch makes driver check the bus master bit for function 0 and enable it after the card initialization. Signed-off-by: Dhananjay Phadke<dhananjay@netxen.com> Signed-off-by: Milan Bag <mbag@netxen.com> Signed-off-by: Wen Xiong <wenxiong@us.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* | | dm9601: Return 0 from bind() on successPeter Korsgaard2007-07-02
| | | | | | | | | | | | | | | | | | | | | | | | Fixup dm9601_bind() so it returns 0 on success rather than just a positive number, as otherwise usbnet doesn't init the status handler. Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* | | usbnet: Zero padding byte if there is tail room in skbPeter Korsgaard2007-07-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Usbnet adds a padding byte if a 0 byte USB packet would be sent. Zero padding byte if there is tail room in skb. Signed-of-by: Peter Korsgaard <jacmet@sunsite.dk> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* | | dm9601: HW header size shouldn't be included in packet lengthPeter Korsgaard2007-07-02
| | | | | | | | | | | | | | | | | | | | | | | | The dm9601 driver was including the 2 byte hardware header in the packet length, causing the HW to send 2 extra bytes of garbage on tx. Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* | | starfire list alpha as 64 bit archmaximilian attems2007-07-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | instead of: "This driver has not been ported to this 64-bit architecture yet." the driver is said to work on alpha, see http://bugs.debian.org/305330 Signed-off-by: maximilian attems <max@stro.at> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* | | myri10ge: SET_NETDEV_DEV()Maik Hampel2007-07-02
| | | | | | | | | | | | | | | | | | | | | | | | SET_NETDEV_DEV() in myri10ge to create the "/sys/class/net/<if>/device" symlink. Signed-off-by: Maik Hampel <m.hampel@gmx.de> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* | | Merge branch 'for_linus' of ↵Jeff Garzik2007-07-02
|\ \ \ | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/galak/powerpc into upstream-fixes
| * | | gianfar: Fix typo bug introduced by move to udp_hdr()Kumar Gala2007-06-29
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In commit 4bedb45203eab92a87b4c863fe2d0cded633427f both the udp and tcp cases where changed to use udp_hdr() instead of leaving the tcp case alone and fixing with tcp_hdr(). This ended up causing random behavior with TCP connections because of looking for tcp_hdr()->check in the wrong place. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | | Merge branch 'libertas-fixes' of ↵Jeff Garzik2007-07-02
|\ \ \ | |_|/ |/| | | | | git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6 into upstream-fixes
| * | [PATCH] libertas: remove private ioctlsDan Williams2007-06-28
| | | | | | | | | | | | | | | | | | Signed-off-by: Christoph Hellwig <hch@infradead.org> Acked-by: Dan Williams <dcbw@redhat.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| * | [PATCH] libertas: fix WPA associations by handling ENABLE_RSN correctlyDan Williams2007-06-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | Don't clobber the firmware's internal state machine by setting ENABLE_RSN more than once during the 4-way handshake. Check what the ENABLE_RSN status is and only set if it should be changed. Signed-off-by: Dan Williams <dcbw@redhat.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| * | [PATCH] libertas: kill wlan_scan_process_resultsDan Williams2007-06-28
| | | | | | | | | | | | | | | | | | | | | Fold into wlan_scan_networks() and protect with debug defines. Signed-off-by: Dan Williams <dcbw@redhat.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| * | [PATCH] libertas: style fixesDan Williams2007-06-28
| | | | | | | | | | | | | | | Signed-off-by: Dan Williams <dcbw@redhat.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | | smsc-ircc2: bypass PNP detection until we get the quirks worked outBjorn Helgaas2007-07-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Don't use PNP detection by default yet. We have some PNP and BIOS issues to work out first. Sample problem on a Toshiba Portege 4000: the SMCf010 device is handed off disabled. We assign I/O ports originally assigned to the SMCf010 to a PCMCIA device instead. We enable the SMCf010, configuring it to use disjoint ports, but _SRS doesn't work correctly, so the device doesn't work. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: Andrey Borzenkov <arvidjaar@mail.ru> Cc: Adam Belay <ambx1@neo.rr.com> Cc: Michal Piotrowski <michal.k.k.piotrowski@gmail.com> Cc: Samuel Ortiz <samuel@sortiz.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | Merge branch 'master' of ↵Linus Torvalds2007-06-30
|\ \ \ | |_|/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 * 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6: [IRDA]: fix printk format [NETPOLL] netconsole: fix soft lockup when removing module [NETPOLL]: tx lock deadlock fix SCTP: lock_sock_nested in sctp_sock_migrate SCTP: Fix sctp_getsockopt_get_peer_addrs SCTP: update sctp_getsockopt helpers to allow oversized buffers
| * | [IRDA]: fix printk formatRandy Dunlap2007-06-29
| |/ | | | | | | | | | | | | | | | | Fix printk format warning: drivers/net/irda/irport.c:512: warning: format '%d' expects type 'int', but argument 5 has type 'long int' Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | Merge branch 'for_linus' of ↵Linus Torvalds2007-06-28
|\ \ | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/galak/powerpc * 'for_linus' of master.kernel.org:/pub/scm/linux/kernel/git/galak/powerpc: phy: Fix phy_id for Vitesse 824x PHY
| * | phy: Fix phy_id for Vitesse 824x PHYKumar Gala2007-06-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The phy_id specified for the Vitesse 824x PHY would never match because it was expecting bits to be set that would be masked by the phy_id_mask. Fix the phy_id so it will match properly, and changed the mdio_bus_match to mask both the driver and devices phy_id with the mask so we dont have this issue in the future. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | | Fix Kconfig dependency problems wrt boolean menuconfigsTrent Piepho2007-06-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If one has a dependency chain (tristate)FOO depends on (bool)BAR depends on (tristate)BAZ, build problems will result. If BAZ=m, then BAR can be set y, which allows FOO=y. It's possible to have FOO=y && BAZ=m, which wouldn't be allowed if FOO depended directly on BAZ. In effect, the bool promotes the tristate from m to y. This ends up causing a problem with several menuconfigs that look like: menuconfig BAR bool depends on BAZ [tristate] if BAR config FOO tristate endif The solution used here is to add the dependencies of BAR to the if statement, so that items in the if block will gain a direct non-bool-promoted dependency on BAZ. This is how it would work if a menu was used instead of an if block. Signed-off-by: Trent Piepho <xyzzy@speakeasy.org> Acked-by: Mauro Carvalho Chehab <mchehab@infradead.org> Cc: "David S. Miller" <davem@davemloft.net> Acked-by: Jeff Garzik <jeff@garzik.org> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Chas Williams <chas@cmf.nrl.navy.mil> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | smsc-ircc2: skip preconfiguration for PNP devicesBjorn Helgaas2007-06-28
|/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If we rely on the device resources from PNPBIOS, we also have to rely on the BIOS to configure any bridges on the way to the device. Using the PNPBIOS resources but changing the configuration of a bridge behind the back of the firmware is likely to make things inconsistent. This patch addresses part of the 2.6.22 regression: "no irda0 interface (2.6.21 was OK), smsc does not find chip" It fixes smsc-ircc2 PNP device detection on HP nx5000 laptops. Other laptops, including HP nc6000, HP nc8000, HP nw8000, and Toshiba Portege 4000, still need PNP quirks to make this work. With "smsc-ircc2.nopnp", we do the legacy device probe, including manual bridge preconfiguration, as before. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: Samuel Ortiz <samuel@sortiz.org> Acked-by: "Linus Walleij (LD/EAB)" <linus.walleij@ericsson.com> Cc: Andrey Borzenkov <arvidjaar@mail.ru> Cc: Michal Piotrowski <michal.k.k.piotrowski@gmail.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Adam Belay <ambx1@neo.rr.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | 2.6.22: ERROR: "__ucmpdi2" [drivers/net/s2io.ko] undefined!Olaf Hering2007-06-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On Tue, Jun 19, Stephen Hemminger wrote: > Olaf Hering <olaf@aepfle.de> wrote: > > What happend to __ucmpdi2 from David Woodhouse? > > google has a few hits about stuff like this on 32bit powerpc with gcc 4.1.2: > > > > ERROR: "__ucmpdi2" [drivers/net/s2io.ko] undefined! > > > > using the drivers/net/s2io* files from 2.6.21 with 2.6.22-rc5 fixes the > > compile. > > > > 25805dcf9d83098cf5492117ad2669cd14cc9b24 adds two u64 >>= 48 followed by > > a switch statement (line 2889 and 6816). > > Probably the "switch(err) {" needs a cast to a smaller type (like u8). This change removes the compiler-generated calls to __ucmpdi2. Signed-off-by: Olaf Hering <olaf@aepfle.de> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* | cxgb3 - fix register to stop bc/mc trafficDivy Le Ray2007-06-27
| | | | | | | | | | | | | | Use the right register to stop broadcast/multicast traffic. Signed-off-by: Divy Le Ray <divy@chelsio.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* | au1000_eth: Fix warnings.Ralf Baechle2007-06-27
|/ | | | | | | | | | | | Fixed by including <linux/dma-mapping.h>: CC drivers/net/au1000_eth.o drivers/net/au1000_eth.c: In function 'au1000_probe': drivers/net/au1000_eth.c:661: warning: implicit declaration of function 'dma_alloc_noncoherent' drivers/net/au1000_eth.c:802: warning: implicit declaration of function 'dma_free_noncoherent' Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [PPP]: Fix osize too small errors when decoding mppe.Konstantin Sharlaimov2007-06-24
| | | | | | | | | The mppe_decompress() function required a buffer that is 1 byte too small when receiving a message of mru size. This fixes buffer allocation to prevent this from occurring. Signed-off-by: Konstantin Sharlaimov <konstantin.sharlaimov@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [PPP]: Revert 606f585e363527da9feaed79465132c0c661fd9eDavid S. Miller2007-06-24
| | | | | | | | This can cause packet buffer overflows in certain cases, the real bug will be fixed differently in a followon changeset. Signed-off-by: David S. Miller <davem@davemloft.net>
* cxgb3 - MAC watchdog updateDivy Le Ray2007-06-20
| | | | | | | Fix variables initialization and usage in the MAC watchdog. Signed-off-by: Divy Le Ray <divy@chelsio.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* cxgb3 - Stop mac RX when changing MTUDivy Le Ray2007-06-20
| | | | | | | | | | Rx traffic needs to be halted when the MTU is changed to avoid a potential chip hang. Reset/restore MAC filters around a MTU change. Also fix the pause frames high materwark setting. Signed-off-by: Divy Le Ray <divy@chelsio.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* cxgb3 - Fix direct XAUI supportDivy Le Ray2007-06-20
| | | | | | | | Check all lanes for link status on direct XAUI cards. Don't assume that direct XAUI always uses XGMAC 1. Signed-off-by: Divy Le Ray <divy@chelsio.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* cxgb3 - fix netpoll hanlderDivy Le Ray2007-06-20
| | | | | | | Fix netpoll handler to work with line interrupt, msi and msi-x. Signed-off-by: Divy Le Ray <divy@chelsio.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* cxgb3 - fix skb->dev dereferenceDivy Le Ray2007-06-20
| | | | | | | | eth_type_trans() now sets skb->dev. References to skb->dev should happen after it is called. Signed-off-by: Divy Le Ray <divy@chelsio.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* natsemi irq flagsGregory Haskins2007-06-20
| | | | | | | The spinlock irq flags should be a unsigned long to properly support 64 bit Signed-off-by: Gregory Haskins <ghaskins@novell.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* forcedeth: use unicast receive mode for WoLTim Mann2007-06-20
| | | | | | | | | | | | | | | I happened to notice that a system with an NVidia NIC using the forcedeth driver won't wake-on-LAN if the interface was in promiscuous mode when you power off. By experiment, it looks like the hardware needs to have NvRegPacketFilterFlags set to NVREG_PFF_ALWAYS|NVREG_PFF_MYADDR (i.e., receive unicast packets to my address) in order for WoL to work. Jeff Garzik writes: "NVIDIA says the patch looks OK." I didn't venture to insert a signed-off-by line with his name on it, though. Signed-off-by: Tim Mann <mann@vmware.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* bonding: Fix 802.3ad no carrier on "no partner found" instanceJay Vosburgh2007-06-20
| | | | | | | | | | | | | | | | | Modify carrier state determination for 802.3ad mode to comply with section 43.3.9 of IEEE 802.3, which requires that "Links that are not successful candidates for aggregation (e.g., links that are attached to other devices that cannot perform aggregation or links that have been manually configured to be non-aggregatable) are enabled to operate as individual IEEE 802.3 links." Bug reported by Laurent Chavey <chavey@google.com>. This patch is an updated version of his patch that changes the wording of commentary and adds an update to the driver version. Signed-off-by: Jay Vosburgh <fubar@us.ibm.com> Signed-off-by: Laurent Chavey <chavey@google.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* bonding: Fix use after free in unregister pathJay Vosburgh2007-06-20
| | | | | | | | | | | | | | | | The following patch (based on a patch from Stephen Hemminger <shemminger@linux-foundation.org>) removes use after free conditions in the unregister path for the bonding master. Without this patch, an operation of the form "echo -bond0 > /sys/class/net/bonding_masters" would trigger a NULL pointer dereference in sysfs. I was not able to induce the failure with the non-sysfs code path, but for consistency I updated that code as well. I also did some testing of the bonding /proc file being open while the bond is being deleted, and didn't see any problems there. Signed-off-by: Jay Vosburgh <fubar@us.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* spidernet: checksum and ethtoolStephen Hemminger2007-06-20
| | | | | | | | | | | | | It doesn't look like spidernet hardware can really checksum all protocols, the code looks like it does IPV4 only. If so, it should use NETIF_F_IP_CSUM instead of NETIF_F_HW_CSUM. The driver doesn't need it's own get/set for ethtool tx csum, and it should use the standard ethtool_op_get_link. Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* spidernet: turn off descriptor chain end interrupt.Linas Vepstas2007-06-20
| | | | | | | | | | At some point, the transmit descriptor chain end interrupt (TXDCEINT) was turned on. This is a mistake; and it damages small packet transmit performance, as it results in a huge storm of interrupts. Turn it off. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* spidernet: silence the ramfull messagesLinas Vepstas2007-06-20
| | | | | | | | | | Although the previous patch resolved issues with hangs when the RX ram full interrupt is encountered, there are still situations where lots of RX ramfull interrupts arrive, resulting in a noisy log in syslog. There is no need for this. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* spidernet: Don't terminate the RX ringLinas Vepstas2007-06-20
| | | | | | | | | | | The terminated RX ring will cause trouble during the RX ram full conditions, leading to a hung driver, as the hardware can't find the next descr. There is no real reason to terminate the RX ring; it doesn't make the operation any smooother, and it does require an extra sync. So don't do it. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* spidernet: Cure RX ram full bugLinas Vepstas2007-06-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes a rare deadlock that can occur when the kernel is not able to empty out the RX ring quickly enough. Below follows a detailed description of the bug and the fix. As long as the OS can empty out the RX buffers at a rate faster than the hardware can fill them, there is no problem. If, for some reason, the OS fails to empty the RX ring fast enough, the hardware GDACTDPA pointer will catch up to the head, notice the not-empty condition, ad stop. However, RX packets may still continue arriving on the wire. The spidernet chip can save some limited number of these in local RAM. When this local ram fills up, the spider chip will issue an interrupt indicating this (GHIINT0STS will show ERRINT, and the GRMFLLINT bit will be set in GHIINT1STS). When te RX ram full condition occurs, a certain bug/feature is triggered that has to be specially handled. This section describes the special handling for this condition. When the OS finally has a chance to run, it will empty out the RX ring. In particular, it will clear the descriptor on which the hardware had stopped. However, once the hardware has decided that a certain descriptor is invalid, it will not restart at that descriptor; instead it will restart at the next descr. This potentially will lead to a deadlock condition, as the tail pointer will be pointing at this descr, which, from the OS point of view, is empty; the OS will be waiting for this descr to be filled. However, the hardware has skipped this descr, and is filling the next descrs. Since the OS doesn't see this, there is a potential deadlock, with the OS waiting for one descr to fill, while the hardware is waiting for a differen set of descrs to become empty. A call to show_rx_chain() at this point indicates the nature of the problem. A typical print when the network is hung shows the following: net eth1: Spider RX RAM full, incoming packets might be discarded! net eth1: Total number of descrs=256 net eth1: Chain tail located at descr=255 net eth1: Chain head is at 255 net eth1: HW curr desc (GDACTDPA) is at 0 net eth1: Have 1 descrs with stat=xa0800000 net eth1: HW next desc (GDACNEXTDA) is at 1 net eth1: Have 127 descrs with stat=x40800101 net eth1: Have 1 descrs with stat=x40800001 net eth1: Have 126 descrs with stat=x40800101 net eth1: Last 1 descrs with stat=xa0800000 Both the tail and head pointers are pointing at descr 255, which is marked xa... which is "empty". Thus, from the OS point of view, there is nothing to be done. In particular, there is the implicit assumption that everything in front of the "empty" descr must surely also be empty, as explained in the last section. The OS is waiting for descr 255 to become non-empty, which, in this case, will never happen. The HW pointer is at descr 0. This descr is marked 0x4.. or "full". Since its already full, the hardware can do nothing more, and thus has halted processing. Notice that descrs 0 through 254 are all marked "full", while descr 254 and 255 are empty. (The "Last 1 descrs" is descr 254, since tail was at 255.) Thus, the system is deadlocked, and there can be no forward progress; the OS thinks there's nothing to do, and the hardware has nowhere to put incoming data. This bug/feature is worked around with the spider_net_resync_head_ptr() routine. When the driver receives RX interrupts, but an examination of the RX chain seems to show it is empty, then it is probable that the hardware has skipped a descr or two (sometimes dozens under heavy network conditions). The spider_net_resync_head_ptr() subroutine will search the ring for the next full descr, and the driver will resume operations there. Since this will leave "holes" in the ring, there is also a spider_net_resync_tail_ptr() that will skip over such holes. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* spidernet: null out skb pointer after its been used.Linas Vepstas2007-06-20
| | | | | | | | | | | | Avoid kernel crash in mm/slab.c due to double-free of pointer. If the ethernet interface is brought down while there is still RX traffic in flight, the device shutdown routine can end up trying to double-free an skb, leading to a crash in mm/slab.c Avoid the double-free by nulling out the skb pointer. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
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