Remove adapter from adapter list before freeing data structure in
error path.
Signed-off-by: NHannes Hering <hering2@de.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NKay Sievers <kay.sievers@vrfy.org>
Acked-by: NGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Reworked receive queue fill policies to make the driver more tolerant
in low memory conditions.
Signed-off-by: NThomas Klein <tklein@de.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

PAGE_SIZE allocations via slab are not guaranteed to be page-aligned. Fixed
all memory allocations where page alignment is required by firmware.
Signed-off-by: NThomas Klein <tklein@de.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Adapt to lately introduced net_device_ops structure.
Signed-off-by: NThomas Klein <tklein@de.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Following the removal of the unused struct net_device * parameter from
the NAPI functions named *netif_rx_* in commit 908a7a16, they are
exactly equivalent to the corresponding *napi_* functions and are
therefore redundant.
Signed-off-by: NBen Hutchings <bhutchings@solarflare.com>
Acked-by: NNeil Horman <nhorman@tuxdriver.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

These are powerpc specific drivers.
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Acked-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

The flags field of struct ehea_port is only used with test_bit(),
clear_bit() and set_bit() and these interfaces only work on
"unsigned long"s, so change the field to be an "unsigned long".  Also,
this field only has two bits defined for it (0 and 1) so will still be
fine if someone builds this driver for a 32 bit arch (at least as far as
this flags field is concerned).

Also note that ehea_driver_flags is only used in ehca_main.c, so make it
static in there.
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Commit 908a7a16 ("net: Remove unused
netdev arg from some NAPI interfaces") missed two spots.
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

When the napi api was changed to separate its 1:1 binding to the net_device
struct, the netif_rx_[prep|schedule|complete] api failed to remove the now
vestigual net_device structure parameter.  This patch cleans up that api by
properly removing it..
Signed-off-by: NNeil Horman <nhorman@tuxdriver.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The generic packet receive code takes care of setting
netdev->last_rx when necessary, for the sake of the
bonding ARP monitor.

Drivers need not do it any more.

Some cases had to be skipped over because the drivers
were making use of the ->last_rx value themselves.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch implements the memory notifier to update the busmap
instantly instead of rebuilding the whole map. This is necessary
because walk_memory_resource provides different information than
required during memory hotplug.
Signed-off-by: NHannes Hering <hering2@de.ibm.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

This reverts commit 2eefbd63.

On request by driver author and Jeff Garzik.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

  Looks like to me that the ehea_fw_handles.lock mutex and the
ehea_bcmc_regs.lock spinlock are taken much longer than necessary and could
as well be pushed inside the functions that need them
(ehea_update_firmware_handles() and ehea_update_bcmc_registrations())
rather than at each callsite.
Signed-off-by: NSebastien Dugue <sebastien.dugue@bull.net>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

The mutex is released on a successful return, so it would seem that it
should be released on an error return as well.

The semantic patch finds this problem is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@@
expression l;
@@

mutex_lock(l);
... when != mutex_unlock(l)
    when any
    when strict
(
if (...) { ... when != mutex_unlock(l)
+   mutex_unlock(l);
    return ...;
}
|
mutex_unlock(l);
)
// </smpl>
Signed-off-by: NJulia Lawall <julia@diku.dk>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

iph->tot_len is stored in network byte order, so access it using
ntohs().  This doesn't have any real world impact on ehea, since ehea
only exists for big-endian platfroms (at the moment at least) but fixing
this gets rid of a sparse warning and avoids having a bad example in the
tree.
Signed-off-by: NRoland Dreier <rolandd@cisco.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

When ehea_stop is called the function
cancel_work_sync(&port->reset_task) is used to ensure
that the reset task is not running anymore. We need an
additional flag to ensure that it can not be scheduled
after this call again for a certain time.
Signed-off-by: NJan-Bernd Themann <themann@de.ibm.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Required to allow distros to easily detect when ehea
module needs to be loaded
Signed-off-by: NJan-Bernd Themann <themann@de.ibm.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

A mutex has to be replaced by spinlocks as it can be called from
a context which does not allow sleeping.
The kzalloc flag GFP_KERNEL has to be replaced by GFP_ATOMIC
for the same reason.
Signed-off-by: NJan-Bernd Themann <themann@de.ibm.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

If the RTNL is held when we invoke flush_scheduled_work() we could
deadlock.  One such case is linkwatch, it is a work struct which tries
to grab the RTNL semaphore.

The most common case are net driver ->stop() methods.  The
simplest conversion is to instead use cancel_{delayed_}work_sync()
explicitly on the various work struct the driver uses.

This is an OK transformation because these work structs are doing
things like resetting the chip, restarting link negotiation, and so
forth.  And if we're bringing down the device, we're about to turn the
chip off and reset it anways.  So if we cancel a pending work event,
that's fine here.

Some drivers were working around this deadlock by using a msleep()
polling loop of some sort, and those cases are converted to instead
use cancel_{delayed_}work_sync() as well.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

eHEA has to call firmware functions in order to change the mac address
of a logical port. This patch checks if the logical port is up
when calling the register / deregister mac address calls. If the port
is down these firmware calls would fail and are therefore not executed.
Signed-off-by: NJan-Bernd Themann <themann@de.ibm.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Fixes the following use after free oops:

ehea: Reboot: freeing all eHEA resources
Unable to handle kernel paging request for data at address 0x6b6b6b6b6b6b6c5b
Faulting instruction address: 0xd000000000354488
cpu 0x0: Vector: 300 (Data Access) at [c00000002ec6f310]
    pc: d000000000354488: .ehea_shutdown_single_port+0x50/0x78 [ehea]
    lr: d00000000035447c: .ehea_shutdown_single_port+0x44/0x78 [ehea]
    sp: c00000002ec6f590
   msr: 8000000000009032
   dar: 6b6b6b6b6b6b6c5b
 dsisr: 40000000
  current = 0xc0000000281412e0
  paca    = 0xc0000000006df300
    pid   = 10930, comm = reboot
enter ? for help
[c00000002ec6f590] d00000000035d64c .ehea_remove+0x44/0x124 [ehea] (unreliable)
[c00000002ec6f630] c000000000319f88 .of_platform_device_remove+0x40/0x58
[c00000002ec6f6a0] c000000000291018 .__device_release_driver+0xb0/0xf0
[c00000002ec6f730] c000000000291120 .driver_detach+0xc8/0xfc
[c00000002ec6f7c0] c00000000028fe24 .bus_remove_driver+0xb4/0x114
[c00000002ec6f850] c000000000291768 .driver_unregister+0x54/0x74
[c00000002ec6f8e0] c00000000031a0c8 .of_unregister_driver+0x14/0x28
[c00000002ec6f950] c000000000023ba0 .ibmebus_unregister_driver+0x10/0x24
[c00000002ec6f9c0] d000000000354180 .ehea_reboot_notifier+0x30/0x4c [ehea]
[c00000002ec6fa40] c0000000003c95a8 .notifier_call_chain+0x5c/0xcc
[c00000002ec6fae0] c000000000082cd4 .__blocking_notifier_call_chain+0x70/0xb0
[c00000002ec6fb90] c000000000075cf8 .kernel_restart_prepare+0x24/0x58
[c00000002ec6fc10] c000000000075f0c .kernel_restart+0x20/0x6c
[c00000002ec6fc90] c000000000078674 .sys_reboot+0x1d4/0x290
[c00000002ec6fe30] c0000000000086ac syscall_exit+0x0/0x40
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

The eHEA driver uses the recently modified walk_memory_resource for powerpc
functionality to detect the memory layout. It further uses the memory hotplug
notifiers to catch memory hotplug events.
Signed-off-by: NHannes Hering <hering2@de.ibm.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

ehea_flush_sq() and ehea_purge_sq() should be static.

Cc: Jeff Garzik <jeff@garzik.org>
Cc: Thomas Klein <osstklei@de.ibm.com>
Cc: Thomas Klein <tklein@de.ibm.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

This patch fixes two weaknesses in send/receive packet handling which may
lead to kernel panics during DLPAR memory add operations.
Signed-off-by: NThomas Klein <tklein@de.ibm.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Convert the port_lock to a mutex.  There is also some additional cleanup.  The
line length inside the ehea_rereg_mrs was getting long so I made some
adjustments to shorten them.

[akpm@linux-foundation.org: dec99ification]
Signed-off-by: NDaniel Walker <dwalker@mvista.com>
Cc: Christoph Raisch <raisch@de.ibm.com>
Cc: Jan-Bernd Themann <themann@de.ibm.com>
Cc: Thomas Klein <tklein@de.ibm.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Convert the ehea_bcmc_regs.lock to a mutex.
Signed-off-by: NDaniel Walker <dwalker@mvista.com>
Cc: Christoph Raisch <raisch@de.ibm.com>
Cc: Jan-Bernd Themann <themann@de.ibm.com>
Cc: Thomas Klein <tklein@de.ibm.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Nested locks always need to be taken in the same order.  This change factors
out the ehea_fw_handles.lock to make the locking order consistent.
Signed-off-by: NDaniel Walker <dwalker@mvista.com>
Cc: Christoph Raisch <raisch@de.ibm.com>
Cc: Jan-Bernd Themann <themann@de.ibm.com>
Cc: Thomas Klein <tklein@de.ibm.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Converted the ehea_fw_handles.lock to a mutex.
Signed-off-by: NDaniel Walker <dwalker@mvista.com>
Cc: Christoph Raisch <raisch@de.ibm.com>
Cc: Jan-Bernd Themann <themann@de.ibm.com>
Cc: Thomas Klein <tklein@de.ibm.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Converted the dlpar_mem_lock.  With a bit of cleanup, I converted to
DEFINE_MUTEX() instead of a runtime init.  I also made the lock static.
Signed-off-by: NDaniel Walker <dwalker@mvista.com>
Cc: Christoph Raisch <raisch@de.ibm.com>
Acked-by: NJan-Bernd Themann <themann@de.ibm.com>
Cc: Thomas Klein <tklein@de.ibm.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Indicate that HEA calculates IPv4 checksums only
Signed-off-by: NThomas Klein <tklein@de.ibm.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

This patch adds kdump support to the ehea driver. As the firmware doesn't free
resource handles automatically, the driver has to run an as simple as possible
free resource function in case of a crash shutdown. The function iterates over
two arrays freeing all resource handles which are stored there. The arrays are
kept up-to-date during normal runtime. The crash handler fn is triggered by the
recently introduced PPC crash shutdown reg/unreg functions.
Signed-off-by: NThomas Klein <tklein@de.ibm.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Due to changes in the struct device_driver there is no direct
access to its kobj any longer. The kobj was used to create
sysfs links between eHEA ethernet devices and the driver.
This patch removes the affected sysfs links to resolve
the build problems.
Signed-off-by: NJan-Bernd Themann <themann@de.ibm.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Cc: Jan-Bernd Themann <themann@de.ibm.com>
Signed-off-by: NDoug Maxey <dwm@austin.ibm.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Prevent driver from brawly logging packet checksum errors.
Signed-off-by: NThomas Klein <tklein@de.ibm.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Using own tx_packets counter instead of firmware counters.
Signed-off-by: NThomas Klein <tklein@de.ibm.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

eHEA resources that are allocated via H_CALLs have a unique identifier each.
These identifiers are necessary to free the resources. A reboot notifier
is used to free all eHEA resources before the indentifiers get lost, i.e
before kexec starts a new kernel.
Signed-off-by: NJan-Bernd Themann <themann@de.ibm.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

napi_disable / napi_enable must be applied on all ehea queues.
Signed-off-by: NJan-Bernd Themann <themann@de.ibm.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Found these while looking at printk uses.

Add missing newlines to dev_<level> uses
Add missing KERN_<level> prefixes to multiline dev_<level>s
Fixed a wierd->weird spelling typo
Added a newline to a printk
Signed-off-by: NJoe Perches <joe@perches.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: Mark M. Hoffman <mhoffman@lightlink.com>
Cc: Roland Dreier <rolandd@cisco.com>
Cc: Tilman Schmidt <tilman@imap.cc>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: Stephen Hemminger <shemminger@linux-foundation.org>
Cc: Greg KH <greg@kroah.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Cc: James Smart <James.Smart@Emulex.Com>
Cc: Andrew Vasquez <andrew.vasquez@qlogic.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Jaroslav Kysela <perex@suse.cz>
Cc: Takashi Iwai <tiwai@suse.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>