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[PATCH] qla2xxx: Fix ql_dump_buffer

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  [PATCH] qla2xxx: Fix ql_dump_buffer Joe Perches <joe@perches.com> - 2017-03-03 02:20 +0100
    RE: [PATCH] qla2xxx: Fix ql_dump_buffer "Madhani, Himanshu" <Himanshu.Madhani@cavium.com> - 2017-03-03 20:30 +0100
    Re: [PATCH] qla2xxx: Fix ql_dump_buffer "Martin K. Petersen" <martin.petersen@oracle.com> - 2017-03-07 04:30 +0100

#1591600 — [PATCH] qla2xxx: Fix ql_dump_buffer

Recent printk changes for KERN_CONT cause this logging to be
defectively emitted on multiple lines.  Fix it.

Also reduces object size a trivial amount.

$ size drivers/scsi/qla2xxx/qla_dbg.o*
   text	   data	    bss	    dec	    hex	filename
  39125	      0	      0	  39125	   98d5	drivers/scsi/qla2xxx/qla_dbg.o.new
  39164	      0	      0	  39164	   98fc	drivers/scsi/qla2xxx/qla_dbg.o.old

Signed-off-by: Joe Perches <joe@perches.com>
---
 drivers/scsi/qla2xxx/qla_dbg.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_dbg.c b/drivers/scsi/qla2xxx/qla_dbg.c
index 21d9fb7fc887..51b4179469d1 100644
--- a/drivers/scsi/qla2xxx/qla_dbg.c
+++ b/drivers/scsi/qla2xxx/qla_dbg.c
@@ -2707,13 +2707,9 @@ ql_dump_buffer(uint32_t level, scsi_qla_host_t *vha, int32_t id,
 	    "%-+5d  0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F\n", size);
 	ql_dbg(level, vha, id,
 	    "----- -----------------------------------------------\n");
-	for (cnt = 0; cnt < size; cnt++, buf++) {
-		if (cnt % 16 == 0)
-			ql_dbg(level, vha, id, "%04x:", cnt & ~0xFU);
-		printk(" %02x", *buf);
-		if (cnt % 16 == 15)
-			printk("\n");
+	for (cnt = 0; cnt < size; cnt += 16) {
+		ql_dbg(level, vha, id, "%04x: ", cnt);
+		print_hex_dump(KERN_CONT, "", DUMP_PREFIX_NONE, 16, 1,
+			       buf + cnt, min(16U, size - cnt), false);
 	}
-	if (cnt % 16 != 0)
-		printk("\n");
 }
-- 
2.10.0.rc2.1.g053435c

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#1592242

> -----Original Message-----
> From: Joe Perches [mailto:joe@perches.com]
> Sent: Thursday, March 2, 2017 5:15 PM
> To: qla2xxx-upstream@qlogic.com
> Cc: James E.J. Bottomley <jejb@linux.vnet.ibm.com>; Martin K. Petersen
> <martin.petersen@oracle.com>; linux-scsi@vger.kernel.org; linux-
> kernel@vger.kernel.org
> Subject: [PATCH] qla2xxx: Fix ql_dump_buffer
> 
> Recent printk changes for KERN_CONT cause this logging to be defectively
> emitted on multiple lines.  Fix it.
> 
> Also reduces object size a trivial amount.
> 
> $ size drivers/scsi/qla2xxx/qla_dbg.o*
>    text	   data	    bss	    dec	    hex	filename
>   39125	      0	      0	  39125	   98d5	drivers/scsi/qla2xxx/qla_dbg.o.new
>   39164	      0	      0	  39164	   98fc	drivers/scsi/qla2xxx/qla_dbg.o.old
> 
> Signed-off-by: Joe Perches <joe@perches.com>
> ---
>  drivers/scsi/qla2xxx/qla_dbg.c | 12 ++++--------
>  1 file changed, 4 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/scsi/qla2xxx/qla_dbg.c b/drivers/scsi/qla2xxx/qla_dbg.c
> index 21d9fb7fc887..51b4179469d1 100644
> --- a/drivers/scsi/qla2xxx/qla_dbg.c
> +++ b/drivers/scsi/qla2xxx/qla_dbg.c
> @@ -2707,13 +2707,9 @@ ql_dump_buffer(uint32_t level, scsi_qla_host_t
> *vha, int32_t id,
>  	    "%-+5d  0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F\n", size);
>  	ql_dbg(level, vha, id,
>  	    "----- -----------------------------------------------\n");
> -	for (cnt = 0; cnt < size; cnt++, buf++) {
> -		if (cnt % 16 == 0)
> -			ql_dbg(level, vha, id, "%04x:", cnt & ~0xFU);
> -		printk(" %02x", *buf);
> -		if (cnt % 16 == 15)
> -			printk("\n");
> +	for (cnt = 0; cnt < size; cnt += 16) {
> +		ql_dbg(level, vha, id, "%04x: ", cnt);
> +		print_hex_dump(KERN_CONT, "", DUMP_PREFIX_NONE, 16,
> 1,
> +			       buf + cnt, min(16U, size - cnt), false);
>  	}
> -	if (cnt % 16 != 0)
> -		printk("\n");
>  }
> --
> 2.10.0.rc2.1.g053435c

Looks Good. 

Acked-by: Himanshu Madhani <himanshu.madhani@cavium.com>

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#1593875

>>>>> "Joe" == Joe Perches <joe@perches.com> writes:

Joe> Recent printk changes for KERN_CONT cause this logging to be
Joe> defectively emitted on multiple lines.  Fix it.

Applied to 4.11/scsi-fixes.

-- 
Martin K. Petersen	Oracle Linux Engineering

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