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Original code incorrectly assumed only status-type-0
IOCBs would be queued to the response-queue, and thus all
entries would safely reference a VHA from the IOCB
'handle.'
Cc: stable@kernel.org
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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Yinghai has reported a lockdep warning on qla2xxx:
[ 77.965784] WARNING: at kernel/lockdep.c:2332
trace_hardirqs_on_caller+0xc6/0x14b()
[ 77.977492] Hardware name: Sun
[ 77.979485] Modules linked in:
[ 77.994337] Pid: 0, comm: swapper Not tainted
2.6.33-rc4-tip-yh-03949-g3a8e3f5-dirty #64
[ 78.000120] Call Trace:
[ 78.013298] <IRQ> [<ffffffff81076b54>] warn_slowpath_common+0x7c/0x94
[ 78.017746] [<ffffffff81cd712c>] ? _raw_spin_unlock_irq+0x30/0x36
[ 78.035171] [<ffffffff81076b80>] warn_slowpath_null+0x14/0x16
[ 78.040152] [<ffffffff810a2ae8>] trace_hardirqs_on_caller+0xc6/0x14b
[ 78.055400] [<ffffffff810a2b7a>] trace_hardirqs_on+0xd/0xf
[ 78.058951] [<ffffffff81cd712c>] _raw_spin_unlock_irq+0x30/0x36
[ 78.074889] [<ffffffff816461ef>] qla24xx_msix_default+0x243/0x281
[ 78.091598] [<ffffffff810a5752>] ? __lock_release+0xa5/0xae
[ 78.096799] [<ffffffff810c02ae>] handle_IRQ_event+0x53/0x113
[ 78.111568] [<ffffffff810c2061>] handle_edge_irq+0xf3/0x13b
[ 78.116255] [<ffffffff81035109>] handle_irq+0x24/0x2f
[ 78.132063] [<ffffffff81cdc4b4>] do_IRQ+0x5c/0xc3
[ 78.134684] [<ffffffff81cd7393>] ret_from_intr+0x0/0xf
[ 78.137903] <EOI> [<ffffffff81039a56>] ? mwait_idle+0xaf/0xbb
[ 78.155674] [<ffffffff81039a4d>] ? mwait_idle+0xa6/0xbb
[ 78.158600] [<ffffffff81031c7c>] cpu_idle+0x61/0xa1
[ 78.174333] [<ffffffff81c85d7a>] rest_init+0x7e/0x80
[ 78.178122] [<ffffffff82832d1f>] start_kernel+0x316/0x31d
[ 78.193623] [<ffffffff82832297>] x86_64_start_reservations+0xa7/0xab
[ 78.198924] [<ffffffff8283237f>] x86_64_start_kernel+0xe4/0xeb
[ 78.214540] ---[ end trace be4529f30a2e4ef5 ]---
This was happened when qla2xxx msix interrupt handler is trying to enable
IRQs by spin_unlock_irq(). We should make interrupt handler safe for IRQs,
use spin_lock_irqsave/spin_unlock_irqrestore, this will not break the IRQs
status in interrupt handler.
Reported-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Xiaotian Feng <dfeng@redhat.com>
Acked-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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address alignment.
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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The driver did not account for non-tape devices needing to employ
proper FCP2 recovery. Driver now checks the FCP2-capable flag
only, rather than using a midlayer-determined flag (TYPE_TAPE).
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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Added fundamental reset and pci save state.
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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Hold the hardware lock while do the response completion in work queue threads as
it involves sharing a common request queue among multiple threads.
Signed-off-by: Anirban Chakraborty <anirban.chakraborty@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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When the hba port gets logged out of the fabric, or other
such transitional state when the physical link is still present,
the driver doesn't receive a loop up asyn event (where the link
data rate currently gets set). Hence send a explicit mailbox command
to get the link rate in such conditions.
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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Fix to accommodate a hardware bug in multiqueue mode that does not
work properly when acknowledgement of MSIX Interrupts is disabled.
Signed-off-by: Anirban Chakraborty <anirban.chakraborty@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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Removed the module parameters ql2xqfulltracking and ql2xqfullrampup
since the queue depth ramp up/down functionality is moved to scsi-ml.
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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Fix crash in qla2x00_fdmi_register() due to the dpc
thread executing before the scsi host has been fully
added.
Unable to handle kernel NULL pointer dereference (address 00000000000001d0)
qla2xxx_7_dpc[4140]: Oops 8813272891392 [1]
Call Trace:
[<a000000100016910>] show_stack+0x50/0xa0
sp=e00000b07c59f930 bsp=e00000b07c591400
[<a000000100017180>] show_regs+0x820/0x860
sp=e00000b07c59fb00 bsp=e00000b07c5913a0
[<a00000010003bd60>] die+0x1a0/0x2e0
sp=e00000b07c59fb00 bsp=e00000b07c591360
[<a0000001000681a0>] ia64_do_page_fault+0x8c0/0x9e0
sp=e00000b07c59fb00 bsp=e00000b07c591310
[<a00000010000c8e0>] ia64_native_leave_kernel+0x0/0x270
sp=e00000b07c59fb90 bsp=e00000b07c591310
[<a000000207197350>] qla2x00_fdmi_register+0x850/0xbe0 [qla2xxx]
sp=e00000b07c59fd60 bsp=e00000b07c591290
[<a000000207171570>] qla2x00_configure_loop+0x1930/0x34c0 [qla2xxx]
sp=e00000b07c59fd60 bsp=e00000b07c591128
[<a0000002071732b0>] qla2x00_loop_resync+0x1b0/0x2e0 [qla2xxx]
sp=e00000b07c59fdf0 bsp=e00000b07c5910c0
[<a000000207166d40>] qla2x00_do_dpc+0x9a0/0xce0 [qla2xxx]
sp=e00000b07c59fdf0 bsp=e00000b07c590fa0
[<a0000001000d5bb0>] kthread+0x110/0x140
sp=e00000b07c59fe00 bsp=e00000b07c590f68
[<a000000100014a30>] kernel_thread_helper+0xd0/0x100
sp=e00000b07c59fe30 bsp=e00000b07c590f40
[<a00000010000a4c0>] start_kernel_thread+0x20/0x40
sp=e00000b07c59fe30 bsp=e00000b07c590f40
crash> dis a000000207197350
0xa000000207197350 <qla2x00_fdmi_register+2128>: [MMI] ld1 r45=[r14];;
crash> scsi_qla_host.host 0xe00000b058c73ff8
host = 0xe00000b058c73be0,
crash> Scsi_Host.shost_data 0xe00000b058c73be0
shost_data = 0x0, <<<<<<<<<<<
The fc_transport fc_* workqueue threads have yet to be created.
crash> ps | grep _7
3891 2 2 e00000b075c80000 IN 0.0 0 0 [scsi_eh_7]
4140 2 3 e00000b07c590000 RU 0.0 0 0 [qla2xxx_7_dpc]
The thread creating adding the Scsi_Host is blocked due to other
activity in sysfs.
crash> bt 3762
PID: 3762 TASK: e00000b071e70000 CPU: 3 COMMAND: "modprobe"
#0 [BSP:e00000b071e71548] schedule at a000000100727e00
#1 [BSP:e00000b071e714c8] __mutex_lock_slowpath at a0000001007295a0
#2 [BSP:e00000b071e714a8] mutex_lock at a000000100729830
#3 [BSP:e00000b071e71478] sysfs_addrm_start at a0000001002584f0
#4 [BSP:e00000b071e71440] create_dir at a000000100259350
#5 [BSP:e00000b071e71410] sysfs_create_subdir at a000000100259510
#6 [BSP:e00000b071e713b0] internal_create_group at a00000010025c880
#7 [BSP:e00000b071e71388] sysfs_create_group at a00000010025cc50
#8 [BSP:e00000b071e71368] dpm_sysfs_add at a000000100425050
#9 [BSP:e00000b071e71310] device_add at a000000100417d90
#10 [BSP:e00000b071e712d8] scsi_add_host at a00000010045a380
#11 [BSP:e00000b071e71268] qla2x00_probe_one at a0000002071be950
#12 [BSP:e00000b071e71248] local_pci_probe at a00000010032e490
#13 [BSP:e00000b071e71218] pci_device_probe at a00000010032ecd0
#14 [BSP:e00000b071e711d8] driver_probe_device at a00000010041d480
#15 [BSP:e00000b071e711a8] __driver_attach at a00000010041d6e0
#16 [BSP:e00000b071e71170] bus_for_each_dev at a00000010041c240
#17 [BSP:e00000b071e71150] driver_attach at a00000010041d0a0
#18 [BSP:e00000b071e71108] bus_add_driver at a00000010041b080
#19 [BSP:e00000b071e710c0] driver_register at a00000010041dea0
#20 [BSP:e00000b071e71088] __pci_register_driver at a00000010032f610
#21 [BSP:e00000b071e71058] (unknown) at a000000207200270
#22 [BSP:e00000b071e71018] do_one_initcall at a00000010000a9c0
#23 [BSP:e00000b071e70f98] sys_init_module at a0000001000fef00
#24 [BSP:e00000b071e70f98] ia64_ret_from_syscall at a00000010000c740
So, it appears that qla2xxx dpc thread is moving forward before the
scsi host has been completely added.
This patch moves the setting of the init_done (and online) flag to
after the call to scsi_add_host() to hold off the dpc thread.
Found via large lun count testing using 2.6.31.
Signed-off-by: Michael Reed <mdr@sgi.com>
Acked-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Cc: stable@kernel.org
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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Some of our virtual SCSI hosts don't have a proper bus parent at the
top, which can be a problem for doing DMA on them
This patch makes the host device cache a pointer to the physical bus
device and provides an extra API for setting it (the normal API picks
it up from the parent). This patch also modifies the qla2xxx and lpfc
vport logic to use the new DMA host setting API.
Acked-By: James Smart <james.smart@emulex.com>
Cc: Stable Tree <stable@kernel.org>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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Move the duplicated code from FC LLDs to SCSI FC transport class.
Acked-by: James Smart <james.smart@emulex.com>
Acked-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Acked-by: Abhijeet Joglekar <abjoglek@cisco.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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This patch modifies scsi_host_template->change_queue_depth so that
it takes an argument indicating why it is being called. This will be
used so that if a LLD needs to do some extra processing when
handling queue fulls or later ramp ups, it can do so.
This is a simple port of the drivers setting a change_queue_depth
callback. In the patch I just have these LLDs adjust the queue depth
if the user was requesting it.
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
[Vasu.Dev: v2
Also converted pmcraid_change_queue_depth and then verified
all modules compile using "make allmodconfig" for any new build
warnings on X86_64.
Updated original description after combing two original
patches from Mike to make this patch git bisectable.]
Signed-off-by: Vasu Dev <vasu.dev@intel.com>
[jejb: fixed up 53c700]
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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Correct issues where the lower scsi-status would be improperly
cleared, instead, allow the midlayer to process the status after
the proper residual-count checks are performed. Finally,
validate firmware status flags prior to assigning values from the
FCP_RSP frame.
Signed-off-by: Lalit Chandivade <lalit.chandivade@qlogic.com>
Signed-off-by: Michael Hernandez <michael.hernandez@qlogic.com>
Signed-off-by: Ravi Anand <ravi.anand@qlogic.com>
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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link disruptions.
Original code would not register FC4 nor FDMI information after a
logical tear-down of an VFC link. Code now triggers registration
date during processing of a 'Report ID Acquisition IOCB', which
is submitted after a FLOGI or FDISC completes.
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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Original code discarded response-info field information and
assumed the command completed successfully without verifying the
target's status within the FCP_RSP packet.
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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parameters to 4K.
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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In some case, the MPI and PHY versions when retrieved after the
Execute-FW mailbox-command are incorrect (255.255.255.255).
Instead, query the information after the check for firmware ready
is done in the abort ISP path.
Signed-off-by: Lalit Chandivade <lalit.chandivade@qlogic.com>
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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The mailbox register values may assist in debugging efforts.
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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Current code attempts to clean up resources when queue create fails and there it
invokes queue free call with a (NULL) pointer to the queue which could not be
allocated in the first place. Fix it by returning directly without invoking the
queue free call as no resources has been allocated at that point of time.
Reported-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Anirban Chakraborty <anirban.chakraborty@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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Original code would inadvertently skip the deferred
fc_remote_port_delete() call for rports hanging off any vport.
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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* Consolidate vport-count processing.
* Correct vp_idx restrictions during RSCN processing.
* Push topology verification check to qla2x00_do_dpc_all_vps().
* Don't skip vport full-login-lip/lip-reset mailbox handling.
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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Original code would break-out of loop after only one iteration.
Signed-off-by: Lalit Chandivade <lalit.chandivade@qlogic.com>
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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In fabric-login based on iop BIT_8 firmware notifies presence of
a FCP2 device and not necessarily a TAPE device. So instead of
setting FCF_TAPE_PRESENT flag there we set it using
scsi_device->type after mid-layer scan recognises "type" of the
device.
It also adds a new flag FCF_FCP2_DEVICE for any future use.
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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ISPs which support this feature include 23xx and above.
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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Lay groundwork for adding alternative asynchronous operations by
generalize and extending the SRB structure. This allows for
follow-on patches to add support for:
- Asynchronous logins.
- ELS/CT passthru requests.
- Loopback requests.
- Non-blocking mailbox commands (ABTS, Task Management, etc).
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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multiqueue fails
When the multiqueue mode fails to work, the driver falls back on single
queue mode. This ensures that the firmware is reinitialized with single
queue options and all the resources are readjusted accordingly.
Signed-off-by: Anirban Chakraborty <anirban.chakraborty@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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base queue
The interrupt handler clears the interrupt status register for response
updates in the base queue while working in the multique mode. This could lead
to missing interrupt for async events, mail box completions etc. as these are
also handled in the base queue. The fix ensures that the interrupt bit is not
cleared for response updates in the ISR when the driver is working in
multiqueue mode.
Signed-off-by: Anirban Chakraborty <anirban.chakraborty@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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One byte added to make the IOCB structure satisfy
size requirements.
Signed-off-by: Shyam Sundar <shyam.sundar@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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Signed-off-by: Santosh Vernekar <santosh.vernekar@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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If vports are created and topology is changed to Loop only, the
driver continuously gets a LIP reset occurred and keeps trying to
enable the vport. Only manage requests during F_Port.
Signed-off-by: Lalit Chandivade <lalit.chandivade@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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Signed-off-by: Santosh Vernekar <santosh.vernekar@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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The RSCN processing is skipped if the event received is global and vha is not recipient.
Signed-off-by: Santosh Vernekar <santosh.vernekar@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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Treat a global port-unavailable PORT_UPDATE (8014h) AEN as a
loop-down event. For this case, within the FCoE domain, the
'logical' interface has been terminated, but the driver will
not receive the classic LOOP_DOWN AEN.
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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Signed-off-by: Ravi Anand <ravi.anand@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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On ppc64, gcc 4.4 spews lots of..
drivers/scsi/qla2xxx/qla_def.h:1485:7: warning: "__LITTLE_ENDIAN" is not defined
Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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* Remove smp_lock.h from files which don't need it (including some headers!)
* Add smp_lock.h to files which do need it
* Make smp_lock.h include conditional in hardirq.h
It's needed only for one kernel_locked() usage which is under CONFIG_PREEMPT
This will make hardirq.h inclusion cheaper for every PREEMPT=n config
(which includes allmodconfig/allyesconfig, BTW)
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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