From: James Smart <jsmart2021@gmail.com>

Date: Fri, 3 Dec 2021 16:26:43 -0800

Subject: scsi: lpfc: Add additional debugfs support for CMF

Patch-mainline: Queued in subsystem maintainer repository

Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi.git

Git-commit: 6014a2468f0e49194f612b1f09f99eacee0a409a

References: bsc1192145

Dump raw CMF parameter information in debugfs cgn_buffer.

Link: https://lore.kernel.org/r/20211204002644.116455-9-jsmart2021@gmail.com

Co-developed-by: Justin Tee <justin.tee@broadcom.com>

Signed-off-by: Justin Tee <justin.tee@broadcom.com>

Signed-off-by: James Smart <jsmart2021@gmail.com>

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Acked-by: Daniel Wagner <dwagner@suse.de>

---

 drivers/scsi/lpfc/lpfc_debugfs.c |   13 ++++++++++++-

 1 file changed, 12 insertions(+), 1 deletion(-)

--- a/drivers/scsi/lpfc/lpfc_debugfs.c

+++ b/drivers/scsi/lpfc/lpfc_debugfs.c

@@ -5491,7 +5491,7 @@ lpfc_cgn_buffer_read(struct file *file,

 		if (len > (LPFC_CGN_BUF_SIZE - LPFC_DEBUG_OUT_LINE_SZ)) {

 			len += scnprintf(buffer + len, LPFC_CGN_BUF_SIZE - len,

 					 "Truncated . . .\n");

-			break;

+			goto out;

 		}

 		len += scnprintf(buffer + len, LPFC_CGN_BUF_SIZE - len,

 				 "%03x: %08x %08x %08x %08x "

@@ -5502,6 +5502,17 @@ lpfc_cgn_buffer_read(struct file *file,

 		cnt += 32;

 		ptr += 8;

 	}

+	if (len > (LPFC_CGN_BUF_SIZE - LPFC_DEBUG_OUT_LINE_SZ)) {

+		len += scnprintf(buffer + len, LPFC_CGN_BUF_SIZE - len,

+				 "Truncated . . .\n");

+		goto out;

+	}

+	len += scnprintf(buffer + len, LPFC_CGN_BUF_SIZE - len,

+			 "Parameter Data\n");

+	ptr = (uint32_t *)&phba->cgn_p;

+	len += scnprintf(buffer + len, LPFC_CGN_BUF_SIZE - len,

+			 "%08x %08x %08x %08x\n",

+			 *ptr, *(ptr + 1), *(ptr + 2), *(ptr + 3));

 out:

 	return simple_read_from_buffer(buf, nbytes, ppos, buffer, len);

 }