[PATCH 2/6] cxlflash: Cache owning adapter within context

Matthew R. Ochs mrochs at linux.vnet.ibm.com
Wed Aug 10 09:39:30 AEST 2016

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 at 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;
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;

More information about the Linuxppc-dev mailing list