Commit graph

189699 commits

Author SHA1 Message Date
James Smart
cb5172eafd [SCSI] lpfc 8.3.11: SLI4 Improvements
- Correct all SLI4 code to work on big endian systems.
- Move read of sli4 params earlier so returned values are used correctly.

Signed-off-by: Alex Iannicelli <alex.iannicelli@emulex.com>
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:48 -05:00
James Smart
999d813f22 [SCSI] lpfc 8.3.11: FCF failover improvements
FCF failover improvements

- Add random FCF failover when there are multiple FCFs available.
- Prevent FCF log messages from being displayed for FC adapters.
- Separate the New FCF and Modified FCF log messages.

Signed-off-by: Alex Iannicelli <alex.iannicelli@emulex.com>
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:47 -05:00
Kei Tokunaga
65c054f235 [SCSI] mpt: modify mptctl_exit() to call proper deregister functions
This patch fixes some issues of mptctl_exit().

  1) It doesn't call mpt_deregister() for mptctl_taskmgmt_id
     => Insmoding/rmmoding mptctl.ko repeadtedly (up to
        MPT_MAX_PROTOCOL_DRIVERS-1 at most) can eat up all cb_idx,
        and that would cause a lack of MptCallbacks[], MptDriverClass[],
        and MptEvHandlers[].

  2) It doesn't call mpt_event_deregister() for mptctl_id
     => Need to call it.

  3) It calls mpt_reset_deregister() for mptctl_taskmgmt_id
     => This could accidentally deregister an innocent reset handler
        that you don't want to.

This patch also adds a check for mptctl_taskmgmt_id.

Signed-off-by: Kei Tokunaga <tokunaga.keiich@jp.fujitsu.com>
Acked-by: "Desai, Kashyap" <Kashyap.Desai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:45 -05:00
Joe Eykholt
f018b73af6 [SCSI] libfc, libfcoe, fcoe: use smp_processor_id() only when preempt disabled
When the kernel is configured for preemption, using smp_processor_id()
when preemption is enabled causes a warning backtrace and is wrong
since we could move off of that CPU as soon as we get the ID,
and we would be referencing the wrong CPU, and possibly an invalid one
if it could be hotswapped out.

Remove the fc_lport_get_stats() function and explicitly use per_cpu_ptr()
to get the statistics.  Where preemption has been disabled by holding
a _bh lock continue to use smp_processor_id(), but otherwise use
get_cpu()/put_cpu().

In fcoe_recv_frame() also changed the cases where we return in the
middle to do a goto to the code which bumps ErrorFrames and does
a put_cpu().  Two of these cases didn't bump ErrorFrames before, but
doing so is harmless because they "can't happen", due to prior length
checks.

Also rearranged code in fcoe_recv_frame() to have only one call to
fc_exch_recv().  It's just as efficient and saves a call to put_cpu().

In fc_fcp.c, adjusted a FIXME comment for code which doesn't need fixing.

Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:44 -05:00
Robert Love
b3ef990c15 [SCSI] libfc: Add debug statements when fc_fcp returns DID_ERROR to scsi-ml
DID_ERROR cases can be ambigouos. Debugging FCP error cases
will be much easier if we have debug statements when we hit
these error conditions.

This patch simply adds debug messages using the FC_FCP_DBG
macro when we return DID_ERROR to SCSI. This way if a DID_ERROR
is reproducible turning on debug_logging will give a clue
to developers as to what the problem might be.

Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:44 -05:00
Vasu Dev
5c12c418e9 [SCSI] libfc: fix fcp pkt recovery in fc_fcp_recv_data
Currently fc_fcp_recv_data calls fc_fcp_retry_cmd to
retry failed IO but in this case tgt is still sending
data frames, therefore exchange needs to be aborted
first before initiating retry. So this patch fixes
this by aborting exchange first then have retry.

Renames fc_timeout_error to fc_fcp_recovery since
fc_timeout_error is already called from several other
places beside from fcp timeout handler and then
used fc_fcp_recovery for abort & retry from
fc_fcp_recv_data, this rename also required renaming
FC_CMD_TIME_OUT status to FC_CMD_RECOVERY to be
consistent with new fc_fcp_recovery.

Data frames are not expected for an DDPed exchange and
potentially it could be tampered data frame, so does
recovery in this case by calling fc_fcp_recovery.

Signed-off-by: Vasu Dev <vasu.dev@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:42 -05:00
Vasu Dev
3e22760d4d [SCSI] libfc: use offload EM instance again instead jumping to next EM
Since use of offloads is more efficient than switching
to non-offload EM. However kept logic same to call em_match
if it is provided in the list of EMs.

Converted fc_exch_alloc to inline being now tiny a function
and already not an exported libfc API any more.

Signed-off-by: Vasu Dev <vasu.dev@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:41 -05:00
Vasu Dev
a104c84457 [SCSI] libfc: fixes unnecessary seq id jump
In some cases seq is incremented twice causing unnecessary
seq jump, for instance fc_exch_recv_seq_resp increments
seq id when fc_sof_is_init is true and that is true for
each incoming xfer ready but then fc_fcp_send_data does
another seq increment to send data for xfer ready.

This patch removes all such seq id jumps, at least it
eliminates few calls to fc_seq_start_next using ex_lock.

Also removes seq id update with incoming frame's seq id
as this is not needed since each end (I or T) just need
to send incremented their own seq id on each TSI from
other end & before sending new sequence within a
exchange.

Signed-off-by: Vasu Dev <vasu.dev@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:41 -05:00
Joe Eykholt
cc3593d388 [SCSI] libfc: fix sequence-initiative WARN in fc_seq_start_next
When starting a new response sequence in a multi-sequence
exchange, a warning was issued that sequence initiative
wasn't held.

The bug was that sequence initiative was cleared by the previous
sequence due to the END_SEQ flag being on.  The intent may have
been to check LAST_SEQ.  Change just to check SEQ_INIT.

Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:40 -05:00
Joe Eykholt
4291365784 [SCSI] libfcoe: eliminate unused link and last_link fields
The link and last_link fields in the fcoe_ctlr struct are no
longer useful, since they are always set to the same value,
and FIP always calls libfc to pass link information to the lport.

Eliminate those fields and rename link_work to timer_work, since
it no longer has any link change work to do.

Thanks to Brian Uchino for discovering this issue.

Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:38 -05:00
Joe Eykholt
50036bbae0 [SCSI] fcoe: remove an unused variable in fcoe_recv_frame()
Remove an unused variable, mac, in fcoe_recv_frame().

Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:38 -05:00
Joe Eykholt
ccfc309802 [SCSI] libfc: send point-to-poin FLOGI LS_ACC to assigned D_DID
The method we've been using for point-to-point mode requires
that the LS_ACC for the FLOGI uses the D_ID and S_ID assigned
to the remote port and local port, not those in the exchange.

This is not the correct method, but for now, it's what works
with the old target, as well as with new targets based on libfc.

This patch changes the addresses used accordingly.

Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:37 -05:00
Joe Eykholt
f4568b8b97 [SCSI] libfc: recognize incoming FLOGI for point-to-point mode
When receiving a FLOGI request from a point-to-point peer,
the D_ID of 0xfffffe was not recognized as belonging to one
of the lports, so it was dropped.

Change fc_vport_id_lookup() to treat d_id 0xfffffe as a match.

Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:37 -05:00
Joe Eykholt
7d65b0df6c [SCSI] fcoe: save gateway address when receiving FLOGI request
In point-to-point mode, we need to save the source MAC
from received FLOGI requests to use as the destination MAC
for all outgoing frames.  We stopped doing that at some point.

Use the lport_set_port_id method to catch incoming FLOGI frames
and pass them to fcoe_ctlr_recv_flogi() so it can save the source MAC.

Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:36 -05:00
Joe Eykholt
e49bf6145f [SCSI] libfcoe: fix debug message entering non-FIP mode
The debug message that indicated we are using non-FIP mode was
being printed only if we were already in non-FIP mode.
Also changed the message text to make it more clear the mode
is being set, not that the message is indicating how FLOGI
was received.

Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:35 -05:00
Joe Eykholt
9860eeb497 [SCSI] fcoe: call fcoe_ctlr_els_send even for ELS responses
In point-to-point mode, the destination MAC address for
the FLOGI response was zero because the LS_ACC for the FLOGI
wasn't getting intercepted by FIP.

Change to call fcoe_ctlr_els_send when sending any ELS,
not just requests.

Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:35 -05:00
Joe Eykholt
2f2ac4a0df [SCSI] libfc: fix oops in point-to-point mode
In point-to-point mode, if the PLOGI to the remote port times
out, it can get deleted by the remote port module.  Since there's
no reference by the local port, lport->ptp_data points to a freed
rport, and when the local port is reset and tries to logout again,
an oops occurs in mutex_lock_nested().

Hold a reference count on the point-to-point rdata.

Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:34 -05:00
Joe Eykholt
4dc7ccf7e9 [SCSI] libfc: add definition for task attribute mask
The FCP command header definition should define a mask for
the task attribute field.  This adds that #define.

Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:34 -05:00
Joe Eykholt
a2f6a024e1 [SCSI] libfc: recode incoming PRLI handling
Reduce indentation in fc_rport_recv_prli_req() using gotos.
Also add payload length checks.

Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:33 -05:00
Richard A Lary
fc193172e6 [SCSI] mpt2sas: use correct pci_resource_flag for comparison
This patch replaces incorrect base address space flag with correct IO
resource flag.  Also, performs check of memory resource to validate
resource before using.

Signed-off-by: Richard A Lary <rlary@linux.vnet.ibm.com>
Acked-by: "Desai, Kashyap" <Kashyap.Desai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:33 -05:00
Julia Lawall
4644efabde [SCSI] bfa: eliminate useless code
The variable bfa_itnim is initialized twice to the same (side effect-free)
expression.  Drop one initialization.

A simplified version of the semantic match that finds this problem is:
(http://coccinelle.lip6.fr/)

// <smpl>
@forall@
idexpression *x;
identifier f!=ERR_PTR;
@@

x = f(...)
... when != x
(
x = f(...,<+...x...+>,...)
|
* x = f(...)
)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: Jing Huang <huangj@brocade.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:32 -05:00
Roel Kluin
f3d6e1dcd2 [SCSI] pmcraid: redundant check in pmcraid_check_ioctl_buffer()
struct pmcraid_ioctl_header member buffer_length is unsigned, so this
check appears redundant.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Acked-by: Anil Ravindranath <anil_ravindranath@pmc-sierra.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:32 -05:00
Roel Kluin
6ce00cae68 [SCSI] gdth: fix buffer overflow
This allows i == MAXHA, which is out of range

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:31 -05:00
Julia Lawall
e05a9e7b18 [SCSI] pm8001: drop redundant memset
The region set by the call to memset is immediately overwritten by the
subsequent call to memcpy.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression e1,e2,e3,e4;
@@

- memset(e1,e2,e3);
  memcpy(e1,e4,e3);
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: Jack Wang <jack_wang@usish.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:30 -05:00
Kashyap, Desai
1278b11f46 [SCSI] mpt2sas : Device removal algorithm in interrupt context only
external host not connecting after controller reboot: The
problem is : devices are not coming back after having the cable
disconnected then reconnected. The problem is because the
driver/firmware device removal handshake is failing. Due to this failure,
the controller firmware is not sending out device add events when the target
is reconnected. This is root caused to a race in the driver/firmware device
removal algorithm. There is duplicate code in both interrupt and user
context; where target reset is being issue from user context path while
sas_iounit_control(OP_REMOVE) is being sent from interrupt context. An
active target_reset will fail the OP_REMOVE. To fix this problem, the
duplicate code has been removed from user context path.

Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:29 -05:00
Kashyap, Desai
40956059fb [SCSI] mpt2sas: Upgrading version to 04.100.01.02
Upgraded version string.

Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Reviewed-by: Eric Moore <eric.moore@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:29 -05:00
Kashyap, Desai
cd9843f8af [SCSI] mpt2sas: modified _scsih_sas_device_find_by_handle/sas_address
modified _scsih_sas_device_find_by_handle
so to handle the search on both list(device list and device_init_list)
Also, we moved the priority of the
search so the ioc->sas_device_list is done first.  The
"sas_device_init_list" is only used during the 1st port enable, so its
unlikely there’s devices on it.

Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Reviewed-by: Eric Moore <eric.moore@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:28 -05:00
Kashyap, Desai
f1c35e6aea [SCSI] mpt2sas: RESCAN Barrier work is added in case of HBA reset.
Add the cancel_pending_work flag from the fw_event_work structure, and then to
set the flag during host reset, check the flag later from work threads
context and if cancel_pending_work_flag is set ingore those events.

Now Rescan after host reset is changed.
Added special task MPT2SAS_RESCAN_AFTER_HOST_RESET. This task will be queued
at the time of HBA reset. this task is treated as barrier. All work after
MPT2SAS_RESCAN_AFTER_HOST_RESET will be treated as new work and will be
server by callback handle. If host_recovery is going on while running RESCAN
task, it will wait for shos_recovery_done completion which will be called
from HBA reset DONE context.

Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Reviewed-by: Eric Moore <eric.moore@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:27 -05:00
Hannes Reinecke
36dd288f0f [SCSI] scsi_transport_fc: Protect against overflow in dev_loss_tmo
The rport structure defines dev_loss_tmo as u32, which is
later multiplied with HZ to get the actual timeout value.
This might overflow for large dev_loss_tmo values. So we
should be better using u64 as intermediate variables here
to protect against overflow.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Acked-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:27 -05:00
FUJITA Tomonori
bb789d0162 [SCSI] mpt2sas: fix the incorrect scsi_dma_map error checking
scsi_dma_map() returns -1 if an error occurred (zero means that the
command has no data). So the following current code can't catch an
error:

sges_left = scsi_dma_map(scmd);
if (!sges_left) {
	sdev_printk(KERN_ERR, scmd->device, "pci_map_sg"
	" failed: request for %d bytes!\n", scsi_bufflen(scmd));
	return -ENOMEM;
}

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: "Desai, Kashyap" <Kashyap.Desai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:26 -05:00
adam radford
c4de0cebc5 [SCSI] 3ware maintainers update
This patch updates the 3ware maintainers in the MAINTAINERS file.

Signed-off-by: Adam Radford <aradford@gmail.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:26 -05:00
adam radford
4deedd845a [SCSI] 3w-xxxx, 3w-9xxx: force 60 second timeout
This small patch forces 60 second timeouts for the older 3w-xxxx &
3w-9xxx drivers for systems that don't contain the udev rule for
setting scsi timeouts to 60 seconds.

Signed-off-by: Adam Radford <aradford@gmail.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-11 09:23:25 -05:00
Jiri Slaby
bc0beb44f2 [SCSI] qla2xxx: fix lock imbalance
Stanse found that one error path in qla24xx_bsg_timeout omits to
unlock ha->hardware_lock. Fix that.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Acked-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-08 18:42:41 -04:00
Jiri Slaby
67221a4226 [SCSI] lpfc: fix lock imbalances
Stanse found that two error paths in lpfc_bsg_rport_els_cmp and
lpfc_issue_ct_rsp_cmp omits to unlock phba->ct_ev_lock. It is
because they wrongly unlock phba->hbalock instead. Fix that.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Acked-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-08 18:42:10 -04:00
Jiri Slaby
4ec3fdbef1 [SCSI] be2iscsi: fix lock imbalance
Stanse found that one error path in mgmt_invalidate_icds omits to unlock
ctrl->mbox_lock. Fix that.

Added in 756d29c8c7 (Enable async mode for mcc rings)
where the spinlock was moved.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Acked-by: Jayamohan Kallickal <jayamohank@serverengines.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-08 18:41:50 -04:00
Dan Carpenter
229bab6bac [SCSI] dpt_i2o: several use after free issues
adpt_i2o_delete_hba() calls kfree() so we have to save "pHba->next"
before calling it.  Also inside adpt_i2o_delete_hba() itself, there
was another use after free bug which I fixed by moving the kfree()
down a line.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-04-08 18:26:15 -04:00
Linus Torvalds
d620a7cf05 Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
  libata: Fix accesses at LBA28 boundary (old bug, but nasty) (v2)
2010-04-08 10:02:02 -07:00
Mark Lord
45c4d015a9 libata: Fix accesses at LBA28 boundary (old bug, but nasty) (v2)
Most drives from Seagate, Hitachi, and possibly other brands,
do not allow LBA28 access to sector number 0x0fffffff (2^28 - 1).
So instead use LBA48 for such accesses.

This bug could bite a lot of systems, especially when the user has
taken care to align partitions to 4KB boundaries. On misaligned systems,
it is less likely to be encountered, since a 4KB read would end at
0x10000000 rather than at 0x0fffffff.

Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2010-04-08 12:53:57 -04:00
Linus Torvalds
2aedd192f7 Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  sched: Fix sched_getaffinity()
2010-04-08 08:37:05 -07:00
Linus Torvalds
cf90bfe2eb Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide-2.6:
  ide: Fix IDE taskfile with cfq scheduler
  ide: Must hold queue lock when requeueing
  ide: Requeue request after DMA timeout
2010-04-08 07:45:36 -07:00
Linus Torvalds
0a2851b9a8 Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
  ACPI / PM: Move ACPI video resume to a PM notifier
  ACPI: Reduce ACPI resource conflict message to KERN_WARNING, printk cleanup
  ACPI: battery drivers should call power_supply_changed()
  ACPI: battery: Fix CONFIG_ACPI_SYSFS_POWER=n
  PNPACPI: truncate _CRS windows with _LEN > _MAX - _MIN + 1
  ACPI: Don't send KEY_UNKNOWN for random video notifications
  ACPI: NUMA: map pxms to low node ids
  ACPI: use _HID when supplied by root-level devices
  ACPI / ACPICA: Do not check reference counters in acpi_ev_enable_gpe()
  ACPI: fixes a false alarm from lockdep
  ACPI dock: support multiple ACPI dock devices
  ACPI: EC: Allow multibyte access to EC
2010-04-08 07:44:53 -07:00
Linus Torvalds
f5284e7635 Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus
* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
  hvc_console: Fix race between hvc_close and hvc_remove
  virtio: disable multiport console support.
  virtio: console makes incorrect assumption about virtio API
  virtio: console: Fix early_put_chars usage
  MAINTAINERS: Put the virtio-console entry in correct alphabetical order
2010-04-07 18:49:20 -07:00
Anton Blanchard
320718ee07 hvc_console: Fix race between hvc_close and hvc_remove
I don't claim to understand the tty layer, but it seems like hvc_open and
hvc_close should be balanced in their kref reference counting.

Right now we get a kref every call to hvc_open:

        if (hp->count++ > 0) {
                tty_kref_get(tty); <----- here
                spin_unlock_irqrestore(&hp->lock, flags);
                hvc_kick();
                return 0;
        } /* else count == 0 */

        tty->driver_data = hp;

        hp->tty = tty_kref_get(tty); <------ or here if hp->count was 0

But hvc_close has:

        tty_kref_get(tty);

        if (--hp->count == 0) {
...
                /* Put the ref obtained in hvc_open() */
                tty_kref_put(tty);
...
        }

        tty_kref_put(tty);

Since the outside kref get/put balance we only do a single kref_put when
count reaches 0.

The patch below changes things to call tty_kref_put once for every
hvc_close call, and with that my machine boots fine.

Signed-off-by: Anton Blanchard <anton@samba.org>
Acked-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-04-08 09:46:20 +09:30
Michael S. Tsirkin
b7a413015d virtio: disable multiport console support.
Move MULTIPORT feature and related config changes
out of exported headers, and disable the feature
at runtime.

At this point, it seems less risky to keep code around
until we can enable it than rip it out completely.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-04-08 09:46:19 +09:30
Rusty Russell
9ff4cfab82 virtio: console makes incorrect assumption about virtio API
The get_buf() API sets the second arg to the number of bytes *written*
by the other side; in this case it should be zero as these are output buffers.

lguest gets this right (obviously kvm's console doesn't), resulting in
continual buildup of console writes.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Amit Shah <amit.shah@redhat.com>
2010-04-08 09:46:17 +09:30
François Diakhaté
162a689a13 virtio: console: Fix early_put_chars usage
Currently early_put_chars is not used by virtio_console because it can
only be used once a port has been found, at which point it's too late
because it is no longer needed. This patch should fix it.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-04-08 09:46:15 +09:30
Amit Shah
9a82446bd2 MAINTAINERS: Put the virtio-console entry in correct alphabetical order
Move around the entry for virtio-console to keep the file sorted.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2010-04-08 09:46:14 +09:30
Kevin Hilman
3eac4abaa6 rwsem generic spinlock: use IRQ save/restore spinlocks
rwsems can be used with IRQs disabled, particularily in early boot
before IRQs are enabled.  Currently the spin_unlock_irq() usage in the
slow-patch will unconditionally enable interrupts and cause problems
since interrupts are not yet initialized or enabled.

This patch uses save/restore versions of IRQ spinlocks in the slowpath
to ensure interrupts are not unintentionally disabled.

Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-04-07 16:15:05 -07:00
Al Viro
04287f975e Have nfs ->d_revalidate() report errors properly
If nfs atomic open implementation ends up doing open request from
->d_revalidate() codepath and gets an error from server, return that error
to caller explicitly and don't bother with lookup_instantiate_filp() at all.
->d_revalidate() can return an error itself just fine...

See
	http://bugzilla.kernel.org/show_bug.cgi?id=15674
	http://marc.info/?l=linux-kernel&m=126988782722711&w=2

for original report.

Reported-by: Daniel J Blueman <daniel.blueman@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-04-07 16:10:16 -07:00
Linus Torvalds
48de8cb784 Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  perf, x86: Enable Nehalem-EX support
  perf kmem: Fix breakage introduced by 5a0e3ad slab.h script
2010-04-07 14:01:51 -07:00