Patch "scsi: bfa: fix type conversion warning" has been added to the 4.14-stable tree

This is a note to let you know that I've just added the patch titled

scsi: bfa: fix type conversion warning

to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
scsi-bfa-fix-type-conversion-warning.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Arnd Bergmann <[email protected]>
Date: Wed, 6 Dec 2017 15:14:18 +0100
Subject: scsi: bfa: fix type conversion warning

From: Arnd Bergmann <[email protected]>

commit 48d83282db077f93b2cf40de120f4d6f29eb293b upstream.

A regression fix introduced a harmless type mismatch warning:

drivers/scsi/bfa/bfad_bsg.c: In function 'bfad_im_bsg_vendor_request':
drivers/scsi/bfa/bfad_bsg.c:3137:35: error: initialization of 'struct bfad_im_port_s *' from 'long unsigned int' makes pointer from integer without a cast [-Werror=int-conversion]

  struct bfad_im_port_s *im_port = shost->hostdata[0];
                                   ^~~~~

drivers/scsi/bfa/bfad_bsg.c: In function 'bfad_im_bsg_els_ct_request':
drivers/scsi/bfa/bfad_bsg.c:3353:35: error: initialization of 'struct bfad_im_port_s *' from 'long unsigned int' makes pointer from integer without a cast [-Werror=int-conversion]
struct bfad_im_port_s *im_port = shost->hostdata[0];

This changes the code back to shost_priv() once more, but encapsulates it in an inline function to document the rather unusual way of using the private data only as a pointer to the previously allocated structure.

I did not try to get rid of the extra indirection level entirely, which would have been rather invasive and required reworking the entire initialization sequence.

---
 drivers/scsi/bfa/bfad_bsg.c |    4 ++--
 drivers/scsi/bfa/bfad_im.c  |    6 ++++--
 drivers/scsi/bfa/bfad_im.h  |   10 ++++++++++
 3 files changed, 16 insertions(+), 4 deletions(-)

@@ -3136,7 +3136,7 @@ bfad_im_bsg_vendor_request(struct bsg_jo
 	struct fc_bsg_reply *bsg_reply = job->reply;
 	uint32_t vendor_cmd = bsg_request->rqst_data.h_vendor.vendor_cmd[0];
 	struct Scsi_Host *shost = fc_bsg_to_shost(job);
-	struct bfad_im_port_s *im_port = shost->hostdata[0];
+	struct bfad_im_port_s *im_port = bfad_get_im_port(shost);
 	struct bfad_s *bfad = im_port->bfad;
 	struct request_queue *request_q = job->req->q;
 	void *payload_kbuf;

@@ -3359,7 +3359,7 @@ bfad_im_bsg_els_ct_request(struct bsg_jo
 {
 	struct bfa_bsg_data *bsg_data;
 	struct Scsi_Host *shost = fc_bsg_to_shost(job);
-	struct bfad_im_port_s *im_port = shost->hostdata[0];
+	struct bfad_im_port_s *im_port = bfad_get_im_port(shost);
 	struct bfad_s *bfad = im_port->bfad;
 	bfa_bsg_fcpt_t *bsg_fcpt;
 	struct bfad_fcxp    *drv_fcxp;

@@ -546,6 +546,7 @@ int
 bfad_im_scsi_host_alloc(struct bfad_s *bfad, struct bfad_im_port_s *im_port,
 			struct device *dev)
 {
+	struct bfad_im_port_pointer *im_portp;
 	int error = 1;
 
 	mutex_lock(&bfad_mutex);

@@ -564,7 +565,8 @@ bfad_im_scsi_host_alloc(struct bfad_s *b
 		goto out_free_idr;
 	}
 
-	im_port->shost->hostdata[0] = (unsigned long)im_port;
+	im_portp = shost_priv(im_port->shost);
+	im_portp->p = im_port;
 	im_port->shost->unique_id = im_port->idr_id;
 	im_port->shost->this_id = -1;
 	im_port->shost->max_id = MAX_FCP_TARGET;

@@ -748,7 +750,7 @@ bfad_scsi_host_alloc(struct bfad_im_port
 
 	sht->sg_tablesize = bfad->cfg_data.io_max_sge;
 
-	return scsi_host_alloc(sht, sizeof(unsigned long));
+	return scsi_host_alloc(sht, sizeof(struct bfad_im_port_pointer));
 }
 
 void

@@ -69,6 +69,16 @@ struct bfad_im_port_s {
 	struct fc_vport *fc_vport;
 };
 
+struct bfad_im_port_pointer {
+	struct bfad_im_port_s *p;
+};
+
+static inline struct bfad_im_port_s *bfad_get_im_port(struct Scsi_Host *host)
+{
+	struct bfad_im_port_pointer *im_portp = shost_priv(host);
+	return im_portp->p;
+}
+
 enum bfad_itnim_state {
 	ITNIM_STATE_NONE,
 	ITNIM_STATE_ONLINE,

Patches currently in stable-queue which might be from [email protected] are

queue-4.14/staging-fsl-mc-fix-build-testing-on-x86.patch queue-4.14/scsi-bfa-fix-type-conversion-warning.patch queue-4.14/asoc-ux500-add-module_license-tag.patch queue-4.14/video-fbdev-mmp-add-module_license.patch queue-4.14/arm64-dts-add-cooling-cells-to-cpu-nodes.patch queue-4.14/arm-8743-1-bl_switcher-add-module_license-tag.patch