| Message ID | 1470785970-9192-1-git-send-email-mrochs@linux.vnet.ibm.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
Acked-by: Manoj N. Kumar <manoj@linux.vnet.ibm.com> On 8/9/2016 6:39 PM, Matthew R. Ochs wrote: > The context removal routine requires access to the owning adapter > structure to reset the context within the AFU as part of the tear > down sequence. In order to support kref adoption, the owning adapter > must be accessible from the release handler. As the kref framework > only provides the kref reference as the sole parameter, another means > is needed to derive the owning adapter. > > As a remedy, the owning adapter reference is saved off within the > context during initialization. > > Signed-off-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com> > --- > drivers/scsi/cxlflash/superpipe.c | 1 + > drivers/scsi/cxlflash/superpipe.h | 1 + > 2 files changed, 2 insertions(+) > > diff --git a/drivers/scsi/cxlflash/superpipe.c b/drivers/scsi/cxlflash/superpipe.c > index ab5c893..640c3a2 100644 > --- a/drivers/scsi/cxlflash/superpipe.c > +++ b/drivers/scsi/cxlflash/superpipe.c > @@ -804,6 +804,7 @@ static void init_context(struct ctx_info *ctxi, struct cxlflash_cfg *cfg, > ctxi->lfd = adap_fd; > ctxi->pid = current->tgid; /* tgid = pid */ > ctxi->ctx = ctx; > + ctxi->cfg = cfg; > ctxi->file = file; > ctxi->initialized = true; > mutex_init(&ctxi->mutex); > diff --git a/drivers/scsi/cxlflash/superpipe.h b/drivers/scsi/cxlflash/superpipe.h > index 5f9a091..61404f2 100644 > --- a/drivers/scsi/cxlflash/superpipe.h > +++ b/drivers/scsi/cxlflash/superpipe.h > @@ -107,6 +107,7 @@ struct ctx_info { > bool err_recovery_active; > struct mutex mutex; /* Context protection */ > struct cxl_context *ctx; > + struct cxlflash_cfg *cfg; > struct list_head luns; /* LUNs attached to this context */ > const struct vm_operations_struct *cxl_mmap_vmops; > struct file *file; >
diff --git a/drivers/scsi/cxlflash/superpipe.c b/drivers/scsi/cxlflash/superpipe.c index ab5c893..640c3a2 100644 --- a/drivers/scsi/cxlflash/superpipe.c +++ b/drivers/scsi/cxlflash/superpipe.c @@ -804,6 +804,7 @@ static void init_context(struct ctx_info *ctxi, struct cxlflash_cfg *cfg, ctxi->lfd = adap_fd; ctxi->pid = current->tgid; /* tgid = pid */ ctxi->ctx = ctx; + ctxi->cfg = cfg; ctxi->file = file; ctxi->initialized = true; mutex_init(&ctxi->mutex); diff --git a/drivers/scsi/cxlflash/superpipe.h b/drivers/scsi/cxlflash/superpipe.h index 5f9a091..61404f2 100644 --- a/drivers/scsi/cxlflash/superpipe.h +++ b/drivers/scsi/cxlflash/superpipe.h @@ -107,6 +107,7 @@ struct ctx_info { bool err_recovery_active; struct mutex mutex; /* Context protection */ struct cxl_context *ctx; + struct cxlflash_cfg *cfg; struct list_head luns; /* LUNs attached to this context */ const struct vm_operations_struct *cxl_mmap_vmops; struct file *file;
The context removal routine requires access to the owning adapter structure to reset the context within the AFU as part of the tear down sequence. In order to support kref adoption, the owning adapter must be accessible from the release handler. As the kref framework only provides the kref reference as the sole parameter, another means is needed to derive the owning adapter. As a remedy, the owning adapter reference is saved off within the context during initialization. Signed-off-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com> --- drivers/scsi/cxlflash/superpipe.c | 1 + drivers/scsi/cxlflash/superpipe.h | 1 + 2 files changed, 2 insertions(+)