lrbp->cmd is set only for SCSI commands. Use this knowledge to simplify two
boolean expressions.
Link: https://lore.kernel.org/r/20200123035637.21848-4-bvanassche@acm.org
Cc: Alim Akhtar <alim.akhtar@samsung.com>
Cc: Tomas Winkler <tomas.winkler@intel.com>
Cc: Bean Huo <beanhuo@micron.com>
Cc: Can Guo <cang@codeaurora.org>
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Asutosh Das <asutoshd@codeaurora.org>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This patch does not change any functionality but makes the next patch in
this series easier to read.
Link: https://lore.kernel.org/r/20200123035637.21848-3-bvanassche@acm.org
Cc: Tomas Winkler <tomas.winkler@intel.com>
Cc: Stanley Chu <stanley.chu@mediatek.com>
Cc: Bean Huo <beanhuo@micron.com>
Cc: Can Guo <cang@codeaurora.org>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
The current behavior of the SCSI core is to clear driver-private data
before preparing a request for submission to the SCSI LLD. Make it possible
for SCSI LLDs to disable clearing of driver-private data.
These hooks will be used by a later patch, namely "scsi: ufs: Let the SCSI
core allocate per-command UFS data".
Link: https://lore.kernel.org/r/20200123035637.21848-2-bvanassche@acm.org
Cc: Tomas Winkler <tomas.winkler@intel.com>
Cc: Stanley Chu <stanley.chu@mediatek.com>
Cc: Bean Huo <beanhuo@micron.com>
Cc: Avri Altman <avri.altman@wdc.com>
Cc: Can Guo <cang@codeaurora.org>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: Johannes Thumshirn <jth@kernel.org>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Remove cmd_list functionality; no users left. With that the
scsi_put_command() becomes empty, so remove that one, too.
Link: https://lore.kernel.org/r/20200228075318.91255-14-hare@suse.de
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart van Assche <bvanassche@acm.org>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Use the SCSI midlayer helper to traverse the number of outstanding
commands. This also eliminates the last usage for the cmd_list
functionality so we can drop it.
Link: https://lore.kernel.org/r/20200228075318.91255-13-hare@suse.de
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Balsundar P <balsundar.p@microchip.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Instead of traversing the list of possible commands by hands we should be
using scsi_host_busy_iter() to figure out if there are outstanding
commands.
Link: https://lore.kernel.org/r/20200228075318.91255-12-hare@suse.de
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Balsundar P < Balsundar.P@microchip.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Add an iterator scsi_host_busy_iter() to traverse all busy commands. If
locking against concurrent command completions is required, it has to be
provided by the caller.
Link: https://lore.kernel.org/r/20200228075318.91255-11-hare@suse.de
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Use scsi_host_block() and scsi_host_unblock() instead of
scsi_block_requests()/scsi_unblock_requests() to block and unblock I/O.
This has the advantage that the block layer will stop sending I/O to the
adapter instead of having the SCSI midlayer requeueing I/O internally.
Link: https://lore.kernel.org/r/20200228075318.91255-10-hare@suse.de
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Balsundar P < Balsundar.P@microchip.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Add helper functions to call scsi_internal_device_block()/
scsi_internal_device_unblock() for all attached devices on a SCSI host.
Link: https://lore.kernel.org/r/20200228075318.91255-9-hare@suse.de
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
_aac_reset_adapter() only has one caller, and that one already calls
scsi_block_requests(). Move the calls out of _aac_reset_adapter() to avoid
calling scsi_block_requests() twice.
Link: https://lore.kernel.org/r/20200228075318.91255-8-hare@suse.de
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Balsundar P < Balsundar.P@microchip.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Use the midlayer helper scsi_host_complete_all_commands() to flush all
outstanding commands.
Link: https://lore.kernel.org/r/20200228075318.91255-7-hare@suse.de
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: Balsundar P <balsundar.p@microchip.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Use scsi_host_complete_all_commands() to terminate all outstanding commands
and change the command result for terminated commands to the more common
'DID_RESET' instead of 'QUEUE_FULL'.
Link: https://lore.kernel.org/r/20200228075318.91255-6-hare@suse.de
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: Balsundar P <balsundar.p@microchip.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
There is no need to wait for outstanding write commands on synchronize
cache; the block layer is responsible for I/O scheduling, no need to
out-guess it in the driver layer.
Link: https://lore.kernel.org/r/20200228075318.91255-5-hare@suse.de
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Balsundar P <balsundar.b@microchip.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Rather than traversing all outstanding commands manually, use the
scsi_host_complete_all_commands() helper to terminate all commands during
reset. With that we can drop the cmd_list usage from the midlayer.
Link: https://lore.kernel.org/r/20200228075318.91255-4-hare@suse.de
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Add a helper scsi_host_complete_all_commands() to terminate all outstanding
commands on a SCSI host.
Link: https://lore.kernel.org/r/20200228075318.91255-3-hare@suse.de
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Rename the badly named function into adpt_i2o_scsi_complete(), and make it
a void function as the return value is never used. This also fixes a
potential use-after-free as the return value might be evaluated from the
command result after the command has been freed.
Link: https://lore.kernel.org/r/20200228075318.91255-2-hare@suse.de
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Use kobj_to_dev to instead of open-coding it.
Link: https://lore.kernel.org/r/20200225100411.10250-1-guosongsu@gmail.com
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Guosong Su <suguosong@xiaomi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Some delays may be required either after gating or before ungating
reference clock for device according to vendor requirements.
Note that in UFS 3.0, the delay time after gating reference
clock can be defined by attribute bRefClkGatingWaitTime. Use the
formal value instead if it can be queried from device.
Link: https://lore.kernel.org/r/20200220134848.8807-2-stanley.chu@mediatek.com
Reviewed-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Western Digital UFS devices require host's PA_TACTIVATE to be lower than
device's PA_TACTIVATE, otherwise it may get stuck during hibern8 sequence.
Link: https://lore.kernel.org/r/1582517363-11536-3-git-send-email-cang@codeaurora.org
Reviewed-by: Asutosh Das <asutoshd@codeaurora.org>
Acked-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Currently ufshcd_vops_apply_dev_quirks() comes after all UniPro parameters
have been tuned. Move it up so that vendors have a chance to apply device
quirks in advance.
Link: https://lore.kernel.org/r/1582517363-11536-2-git-send-email-cang@codeaurora.org
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Use an enum to specify the various quirks instead of #defines inside the
structure definition.
[mkp: fix typo]
Link: https://lore.kernel.org/r/20200221140812.476338-3-hch@lst.de
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Remove various quirks that don't have users, as well as the dead code keyed
off them.
Link: https://lore.kernel.org/r/20200221140812.476338-2-hch@lst.de
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
When transitioning from loop to N2N, stale NPort ID is not
re-assigned. Stale ID can collide with remote device. This patch will
re-assign NPort ID on N2N is detected.
Link: https://lore.kernel.org/r/20200226224022.24518-18-hmadhani@marvell.com
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Certain state flags bit combinations are not checked and not handled
correctly. Plus, do not log a normal underrun situation where there is
no frame drop.
Link: https://lore.kernel.org/r/20200226224022.24518-17-hmadhani@marvell.com
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Arun Easi <aeasi@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
T10-PI and FC-NVMe are not mutually exclusive. This patch removes
restrictions where if FC-NVMe is enabled T10-PI defaults to disabled.
Link: https://lore.kernel.org/r/20200226224022.24518-16-hmadhani@marvell.com
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
For N2N, fc_port struct is created during report id acquisition. At
later time, the loop resync (fabric, n2n, loop) would trigger the rest
of the login using the created fc_port struct. The loop resync logic
can trigger another fc_port allocation if the 1st allocation was not
able to execute. This patch prevents the 2nd allocation trigger.
Link: https://lore.kernel.org/r/20200226224022.24518-15-hmadhani@marvell.com
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
NPIV re-enable code was blocked after FW had been initialized. The
blocking check was too broad. Reduce the check to make sure if FW is
initialized or not.
Link: https://lore.kernel.org/r/20200226224022.24518-14-hmadhani@marvell.com
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
RPD information failed to display by switch cli command. This is
caused by driver failure to properly format RDP response data with
data descriptor to allow switch to parse it correctly.
Link: https://lore.kernel.org/r/20200226224022.24518-13-hmadhani@marvell.com
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
For single port 28XX adapter, the second core can still run in the
background. The flash semaphore can be held by the non-active core.
This patch tell MPI FW to check for this case and clear the semaphore
from the non-active core.
Link: https://lore.kernel.org/r/20200226224022.24518-12-hmadhani@marvell.com
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Per FW request, MB 1-7 should be logged for 8002 error.
Link: https://lore.kernel.org/r/20200226224022.24518-11-hmadhani@marvell.com
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
commit e4e3a2ce95 ("scsi: qla2xxx: Add ability to autodetect SFP
type") takes a heavy handed approach to BPM (Buffer Plus Management)
enablement:
1) During hardware initialization, if an LR-capable transceiver is
recognized, the driver schedules a disruptive post-initialization
chip-reset (ISP-ABORT) to allow the BPM settings to be sent to the
firmware. This chip-reset will result in (short-term) path-loss to
all fc-rports and their attached SCSI devices.
2) LR-detection is triggered during any link-up event, resulting in a
refresh and potential chip-reset
Based on firmware-team guidance, upon LR-capable transceiver
recognition, the driver's hardware initialization code will now
re-execute firmware with the new BPM settings, then continue on with
driver initialization. To address the second issue, the driver
performs LR-capable detection upon the driver receiving a
transceiver-insertion asynchronous event from firmware. No short-term
path loss is needed with this new semantic.
Link: https://lore.kernel.org/r/20200226224022.24518-10-hmadhani@marvell.com
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Andrew Vasquez <andrewv@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This patch fixes issue where current and original exchanges count
were swapped for intiator and targets.
Also fix IOCB count for current and original which were swapped.
Link: https://lore.kernel.org/r/20200226224022.24518-9-hmadhani@marvell.com
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
There's no point checking flags.disable_msix_handshake in the
interrupt handler hot-path. Instead perform the check during
queue-pair instantiation and use the proper interrupt handler.
Link: https://lore.kernel.org/r/20200226224022.24518-8-hmadhani@marvell.com
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Andrew Vasquez <andrewv@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This patch ensures flash updates API calls return possible failure
status through BSG interface to the application.
Link: https://lore.kernel.org/r/20200226224022.24518-7-hmadhani@marvell.com
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Michael Hernandez <mhernandez@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This patch improved message for Secure Flash support. No
functionality has been changed.
Link: https://lore.kernel.org/r/20200226224022.24518-6-hmadhani@marvell.com
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Michael Hernandez <mhernandez@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This patch fixes issue where incorrect flag was used for sending
switch commands.
Link: https://lore.kernel.org/r/20200226224022.24518-5-hmadhani@marvell.com
Fixes: e8c72ba51a ("[SCSI] qla2xxx: Use GFF_ID to check FCP-SCSI FC4 type before logging into Nx_Ports")
Fixes: a4239945b8 ("scsi: qla2xxx: Add switch command to simplify fabric discovery")
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This patch uses generic firmware update options for FCoE based
adapters as well to reduce code duplication.
Link: https://lore.kernel.org/r/20200226224022.24518-4-hmadhani@marvell.com
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Giridhar Malavali <gmalavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This patch moves ql2xrdpenable check earlier to avoids setting
fw_option once again before exiting qla24xx_update_fw_options.
Link: https://lore.kernel.org/r/20200226224022.24518-3-hmadhani@marvell.com
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Giridhar Malavali <gmalavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This patch allows sparse to verify the endianness of the arguments passed
to make_handle().
Link: https://lore.kernel.org/r/20200220043441.20504-5-bvanassche@acm.org
Cc: Roman Bolshakov <r.bolshakov@yadro.com>
Cc: Daniel Wagner <dwagner@suse.de>
Cc: Martin Wilck <mwilck@suse.com>
Cc: Quinn Tran <qutran@marvell.com>
Reviewed-by: Daniel Wagner <dwagner@suse.de>
Reviewed-by: Roman Bolshakov <r.bolshakov@yadro.com>
Acked-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This patch fixes the following sparse warnings:
drivers/scsi/qla2xxx/qla_mbx.c:120:21: warning: restricted pci_channel_state_t degrades to integer
drivers/scsi/qla2xxx/qla_mbx.c:120:37: warning: restricted pci_channel_state_t degrades to integer
>From include/linux/pci.h:
enum pci_channel_state {
/* I/O channel is in normal state */
pci_channel_io_normal = (__force pci_channel_state_t) 1,
/* I/O to channel is blocked */
pci_channel_io_frozen = (__force pci_channel_state_t) 2,
/* PCI card is dead */
pci_channel_io_perm_failure = (__force pci_channel_state_t) 3,
};
Link: https://lore.kernel.org/r/20200220043441.20504-4-bvanassche@acm.org
Cc: Roman Bolshakov <r.bolshakov@yadro.com>
Cc: Martin Wilck <mwilck@suse.com>
Cc: Quinn Tran <qutran@marvell.com>
Reviewed-by: Daniel Wagner <dwagner@suse.de>
Reviewed-by: Roman Bolshakov <r.bolshakov@yadro.com>
Acked-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Instead of changing endianness in-place, write the data in CPU endian
format in another buffer and copy that buffer back. This patch does not
change any functionality but silences some sparse endianness warnings.
Link: https://lore.kernel.org/r/20200220043441.20504-3-bvanassche@acm.org
Cc: Roman Bolshakov <r.bolshakov@yadro.com>
Cc: Martin Wilck <mwilck@suse.com>
Cc: Quinn Tran <qutran@marvell.com>
Reviewed-by: Daniel Wagner <dwagner@suse.de>
Reviewed-by: Roman Bolshakov <r.bolshakov@yadro.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Since the SCSI core does not reuse the tag of the SCSI command that is
being aborted by .eh_abort() before .eh_abort() has finished it is not
necessary to check from inside that callback whether or not the SCSI
command has already completed. Instead, rely on the firmware to return an
error code when attempting to abort a command that has already
completed. Additionally, rely on the firmware to return an error code when
attempting to abort an already aborted command.
In qla2x00_abort_srb(), use blk_mq_request_started() instead of
sp->completed and sp->aborted.
Link: https://lore.kernel.org/r/20200220043441.20504-2-bvanassche@acm.org
Cc: Martin Wilck <mwilck@suse.com>
Cc: Quinn Tran <qutran@marvell.com>
Reviewed-by: Daniel Wagner <dwagner@suse.de>
Reviewed-by: Roman Bolshakov <r.bolshakov@yadro.com>
Acked-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
There is a spelling mistake in a lpfc_printf_vlog info message. Fix it.
[mkp: fix spelling mistake in commit description]
Link: https://lore.kernel.org/linux-scsi/20200221154841.77791-1-colin.king@canonical.com
Reviewed-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This kernel configuration is basically enabling/disabling sr driver quirks
detection. While these quirks are for fairly rare devices (very old CD
burners, and a glucometer), the additional detection of these models is a
very minimal amount of code.
The logic behind the quirks is always built into the sr driver.
This also removes the config from all the defconfig files that are enabling
this already.
Link: https://lore.kernel.org/r/20200223191144.726-1-flameeyes@flameeyes.com
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Diego Elio Pettenò <flameeyes@flameeyes.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
ch_mutex() was introduced with a mechanical conversion, but as we now have
correct locking we can remove it altogether.
Link: https://lore.kernel.org/r/20200213153207.123357-4-hare@suse.de
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
The 'ch' device node is created before the configuration is being read in,
which leads to a race window when ch_open() is called before that.
To avoid any races we should be taking the device mutex during
ch_readconfig() and ch_init_elem(), and also during ch_open().
That ensures ch_probe is finished before ch_open() completes.
Link: https://lore.kernel.org/r/20200213153207.123357-3-hare@suse.de
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
