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SubjectRe: linux-next: manual merge of the scsi tree with the staging tree
Hi all,

On Mon, 28 Aug 2017 16:41:27 +1000 Stephen Rothwell <sfr@canb.auug.org.au> wrote:
>
> Today's linux-next merge of the scsi tree got a conflict in:
>
> drivers/staging/unisys/visorhba/visorhba_main.c
>
> between commits:
>
> 781facd05eb9 ("staging: unisys: visorhba: visorhba_main.c: fixed comment formatting issues")
>
> from the staging tree and commit:
>
> 7bc4e528d9f6 ("scsi: visorhba: sanitze private device data allocation")
>
> from the scsi tree.
>
> I fixed it up (see below) and can carry the fix as necessary. This
> is now fixed as far as linux-next is concerned, but any non trivial
> conflicts should be mentioned to your upstream maintainer when your tree
> is submitted for merging. You may also want to consider cooperating
> with the maintainer of the conflicting tree to minimise any particularly
> complex conflicts.
>
> --
> Cheers,
> Stephen Rothwell
>
> diff --cc drivers/staging/unisys/visorhba/visorhba_main.c
> index 8567e447891e,ddce92552ff5..000000000000
> --- a/drivers/staging/unisys/visorhba/visorhba_main.c
> +++ b/drivers/staging/unisys/visorhba/visorhba_main.c
> @@@ -44,12 -44,11 +44,11 @@@ static struct visor_channeltype_descrip
> };
>
> MODULE_DEVICE_TABLE(visorbus, visorhba_channel_types);
> -MODULE_ALIAS("visorbus:" VISOR_VHBA_CHANNEL_UUID_STR);
> +MODULE_ALIAS("visorbus:" VISOR_VHBA_CHANNEL_GUID_STR);
>
> struct visordisk_info {
> + struct scsi_device *sdev;
> u32 valid;
> - /* Disk Path */
> - u32 channel, id, lun;
> atomic_t ios_threshold;
> atomic_t error_count;
> struct visordisk_info *next;
> @@@ -105,25 -101,19 +104,19 @@@ struct visorhba_devices_open
> struct visorhba_devdata *devdata;
> };
>
> - #define for_each_vdisk_match(iter, list, match) \
> - for (iter = &list->head; iter->next; iter = iter->next) \
> - if ((iter->channel == match->channel) && \
> - (iter->id == match->id) && \
> - (iter->lun == match->lun))
> -
> /*
> - * visor_thread_start - starts a thread for the device
> - * @threadfn: Function the thread starts
> - * @thrcontext: Context to pass to the thread, i.e. devdata
> - * @name: string describing name of thread
> + * visor_thread_start - Starts a thread for the device
> + * @threadfn: Function the thread starts
> + * @thrcontext: Context to pass to the thread, i.e. devdata
> + * @name: String describing name of thread
> *
> - * Starts a thread for the device.
> + * Starts a thread for the device.
> *
> - * Return the task_struct * denoting the thread on success,
> - * or NULL on failure
> + * Return: The task_struct * denoting the thread on success,
> + * or NULL on failure
> */
> -static struct task_struct *visor_thread_start
> -(int (*threadfn)(void *), void *thrcontext, char *name)
> +static struct task_struct *visor_thread_start(int (*threadfn)(void *),
> + void *thrcontext, char *name)
> {
> struct task_struct *task;
>
> @@@ -302,21 -280,19 +295,20 @@@ static void cleanup_scsitaskmgmt_handle
> }
>
> /*
> - * forward_taskmgmt_command - send taskmegmt command to the Service
> - * Partition
> - * @tasktype: Type of taskmgmt command
> - * @scsidev: Scsidev that issued command
> + * forward_taskmgmt_command - Send taskmegmt command to the Service
> + * Partition
> + * @tasktype: Type of taskmgmt command
> + * @scsidev: Scsidev that issued command
> *
> - * Create a cmdrsp packet and send it to the Serivce Partition
> - * that will service this request.
> - * Returns whether the command was queued successfully or not.
> + * Create a cmdrsp packet and send it to the Serivce Partition
> + * that will service this request.
> + *
> + * Return: Int representing whether command was queued successfully or not
> */
> static int forward_taskmgmt_command(enum task_mgmt_types tasktype,
> - struct scsi_cmnd *scsicmd)
> + struct scsi_device *scsidev)
> {
> struct uiscmdrsp *cmdrsp;
> - struct scsi_device *scsidev = scsicmd->device;
> struct visorhba_devdata *devdata =
> (struct visorhba_devdata *)scsidev->host->hostdata;
> int notifyresult = 0xffff;
> @@@ -607,24 -570,19 +604,21 @@@ static int visorhba_slave_alloc(struct
> struct visorhba_devdata *devdata;
> struct Scsi_Host *scsihost = (struct Scsi_Host *)scsidev->host;
>
> ++ /* already allocated return success */
> + if (scsidev->hostdata)
> - return 0; /* already allocated return success */
> ++ return 0;
> +
> + /* even though we errored, treat as success */
> devdata = (struct visorhba_devdata *)scsihost->hostdata;
> if (!devdata)
> - return 0; /* even though we errored, treat as success */
> + return 0;
>
> - /* already allocated return success */
> - for_each_vdisk_match(vdisk, devdata, scsidev)
> - return 0;
> -
> - tmpvdisk = kzalloc(sizeof(*tmpvdisk), GFP_ATOMIC);
> - if (!tmpvdisk)
> + vdisk = kzalloc(sizeof(*vdisk), GFP_ATOMIC);
> + if (!vdisk)
> return -ENOMEM;
>
> - tmpvdisk->channel = scsidev->channel;
> - tmpvdisk->id = scsidev->id;
> - tmpvdisk->lun = scsidev->lun;
> - vdisk->next = tmpvdisk;
> + vdisk->sdev = scsidev;
> + scsidev->hostdata = vdisk;
> return 0;
> }
>
> @@@ -814,16 -766,16 +802,15 @@@ static int visorhba_serverdown(struct v
> }
>
> /*
> - * do_scsi_linuxstat - scsi command returned linuxstat
> - * @cmdrsp: response from IOVM
> - * @scsicmd: Command issued.
> + * do_scsi_linuxstat - Scsi command returned linuxstat
> + * @cmdrsp: Response from IOVM
> + * @scsicmd: Command issued
> *
> - * Don't log errors for disk-not-present inquiries
> - * Returns void
> + * Don't log errors for disk-not-present inquiries.
> */
> -static void
> -do_scsi_linuxstat(struct uiscmdrsp *cmdrsp, struct scsi_cmnd *scsicmd)
> +static void do_scsi_linuxstat(struct uiscmdrsp *cmdrsp,
> + struct scsi_cmnd *scsicmd)
> {
> - struct visorhba_devdata *devdata;
> struct visordisk_info *vdisk;
> struct scsi_device *scsidev;
>

Just a reminder that the above conflict still exists.

--
Cheers,
Stephen Rothwell

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