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Date:   Fri, 8 Feb 2019 22:57:31 +0000
From:   "Derrick, Jonathan" <jonathan.derrick@...el.com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "zub@...ux.fjfi.cvut.cz" <zub@...ux.fjfi.cvut.cz>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "sbauer@...donthack.me" <sbauer@...donthack.me>,
        "axboe@...nel.dk" <axboe@...nel.dk>
CC:     "jonas.rabenstein@...dium.uni-erlangen.de" 
        <jonas.rabenstein@...dium.uni-erlangen.de>
Subject: Re: [PATCH v4 04/16] block: sed-opal: close parameter list in
 cmd_finalize

Normally I wouldn't like decreasing the readability (having a STARTLIST
without an ENDLIST in the same function), but this makes a lot of sense
with 5/16

Acked-by: Jon Derrick <jonathan.derrick@...el.com>

On Fri, 2019-02-01 at 21:50 +0100, David Kozub wrote:
> Every step ends by calling cmd_finalize (via finalize_and_send)
> yet every step adds the token OPAL_ENDLIST on its own. Moving
> this into cmd_finalize decreases code duplication.
> 
> Co-authored-by: Jonas Rabenstein <jonas.rabenstein@...dium.uni-erlangen.de>
> Signed-off-by: David Kozub <zub@...ux.fjfi.cvut.cz>
> Signed-off-by: Jonas Rabenstein <jonas.rabenstein@...dium.uni-erlangen.de>
> Reviewed-by: Scott Bauer <sbauer@...donthack.me>
> ---
>  block/sed-opal.c | 25 +++----------------------
>  1 file changed, 3 insertions(+), 22 deletions(-)
> 
> diff --git a/block/sed-opal.c b/block/sed-opal.c
> index 980705681806..35b1747b650f 100644
> --- a/block/sed-opal.c
> +++ b/block/sed-opal.c
> @@ -661,6 +661,9 @@ static int cmd_finalize(struct opal_dev *cmd, u32 hsn, u32 tsn)
>  	struct opal_header *hdr;
>  	int err = 0;
>  
> +	/* close parameter list */
> +	add_token_u8(&err, cmd, OPAL_ENDLIST);
> +
>  	add_token_u8(&err, cmd, OPAL_ENDOFDATA);
>  	add_token_u8(&err, cmd, OPAL_STARTLIST);
>  	add_token_u8(&err, cmd, 0);
> @@ -1079,7 +1082,6 @@ static int gen_key(struct opal_dev *dev, void *data)
>  	add_token_bytestring(&err, dev, opalmethod[OPAL_GENKEY],
>  			     OPAL_UID_LENGTH);
>  	add_token_u8(&err, dev, OPAL_STARTLIST);
> -	add_token_u8(&err, dev, OPAL_ENDLIST);
>  
>  	if (err) {
>  		pr_debug("Error building gen key command\n");
> @@ -1142,7 +1144,6 @@ static int get_active_key(struct opal_dev *dev, void *data)
>  	add_token_u8(&err, dev, 10); /* ActiveKey */
>  	add_token_u8(&err, dev, OPAL_ENDNAME);
>  	add_token_u8(&err, dev, OPAL_ENDLIST);
> -	add_token_u8(&err, dev, OPAL_ENDLIST);
>  	if (err) {
>  		pr_debug("Error building get active key command\n");
>  		return err;
> @@ -1188,7 +1189,6 @@ static int generic_lr_enable_disable(struct opal_dev *dev,
>  
>  	add_token_u8(&err, dev, OPAL_ENDLIST);
>  	add_token_u8(&err, dev, OPAL_ENDNAME);
> -	add_token_u8(&err, dev, OPAL_ENDLIST);
>  	return err;
>  }
>  
> @@ -1254,8 +1254,6 @@ static int setup_locking_range(struct opal_dev *dev, void *data)
>  
>  		add_token_u8(&err, dev, OPAL_ENDLIST);
>  		add_token_u8(&err, dev, OPAL_ENDNAME);
> -		add_token_u8(&err, dev, OPAL_ENDLIST);
> -
>  	}
>  	if (err) {
>  		pr_debug("Error building Setup Locking range command.\n");
> @@ -1295,7 +1293,6 @@ static int start_generic_opal_session(struct opal_dev *dev,
>  
>  	switch (auth) {
>  	case OPAL_ANYBODY_UID:
> -		add_token_u8(&err, dev, OPAL_ENDLIST);
>  		break;
>  	case OPAL_ADMIN1_UID:
>  	case OPAL_SID_UID:
> @@ -1308,7 +1305,6 @@ static int start_generic_opal_session(struct opal_dev *dev,
>  		add_token_bytestring(&err, dev, opaluid[auth],
>  				     OPAL_UID_LENGTH);
>  		add_token_u8(&err, dev, OPAL_ENDNAME);
> -		add_token_u8(&err, dev, OPAL_ENDLIST);
>  		break;
>  	default:
>  		pr_debug("Cannot start Admin SP session with auth %d\n", auth);
> @@ -1406,7 +1402,6 @@ static int start_auth_opal_session(struct opal_dev *dev, void *data)
>  	add_token_u8(&err, dev, 3);
>  	add_token_bytestring(&err, dev, lk_ul_user, OPAL_UID_LENGTH);
>  	add_token_u8(&err, dev, OPAL_ENDNAME);
> -	add_token_u8(&err, dev, OPAL_ENDLIST);
>  
>  	if (err) {
>  		pr_debug("Error building STARTSESSION command.\n");
> @@ -1429,7 +1424,6 @@ static int revert_tper(struct opal_dev *dev, void *data)
>  	add_token_bytestring(&err, dev, opalmethod[OPAL_REVERT],
>  			     OPAL_UID_LENGTH);
>  	add_token_u8(&err, dev, OPAL_STARTLIST);
> -	add_token_u8(&err, dev, OPAL_ENDLIST);
>  	if (err) {
>  		pr_debug("Error building REVERT TPER command.\n");
>  		return err;
> @@ -1463,7 +1457,6 @@ static int internal_activate_user(struct opal_dev *dev, void *data)
>  	add_token_u8(&err, dev, OPAL_ENDNAME);
>  	add_token_u8(&err, dev, OPAL_ENDLIST);
>  	add_token_u8(&err, dev, OPAL_ENDNAME);
> -	add_token_u8(&err, dev, OPAL_ENDLIST);
>  
>  	if (err) {
>  		pr_debug("Error building Activate UserN command.\n");
> @@ -1490,7 +1483,6 @@ static int erase_locking_range(struct opal_dev *dev, void *data)
>  	add_token_bytestring(&err, dev, opalmethod[OPAL_ERASE],
>  			     OPAL_UID_LENGTH);
>  	add_token_u8(&err, dev, OPAL_STARTLIST);
> -	add_token_u8(&err, dev, OPAL_ENDLIST);
>  
>  	if (err) {
>  		pr_debug("Error building Erase Locking Range Command.\n");
> @@ -1521,7 +1513,6 @@ static int set_mbr_done(struct opal_dev *dev, void *data)
>  	add_token_u8(&err, dev, OPAL_ENDNAME);
>  	add_token_u8(&err, dev, OPAL_ENDLIST);
>  	add_token_u8(&err, dev, OPAL_ENDNAME);
> -	add_token_u8(&err, dev, OPAL_ENDLIST);
>  
>  	if (err) {
>  		pr_debug("Error Building set MBR Done command\n");
> @@ -1553,7 +1544,6 @@ static int set_mbr_enable_disable(struct opal_dev *dev, void *data)
>  	add_token_u8(&err, dev, OPAL_ENDNAME);
>  	add_token_u8(&err, dev, OPAL_ENDLIST);
>  	add_token_u8(&err, dev, OPAL_ENDNAME);
> -	add_token_u8(&err, dev, OPAL_ENDLIST);
>  
>  	if (err) {
>  		pr_debug("Error Building set MBR done command\n");
> @@ -1585,7 +1575,6 @@ static int generic_pw_cmd(u8 *key, size_t key_len, u8 *cpin_uid,
>  	add_token_u8(&err, dev, OPAL_ENDNAME);
>  	add_token_u8(&err, dev, OPAL_ENDLIST);
>  	add_token_u8(&err, dev, OPAL_ENDNAME);
> -	add_token_u8(&err, dev, OPAL_ENDLIST);
>  
>  	return err;
>  }
> @@ -1694,7 +1683,6 @@ static int add_user_to_lr(struct opal_dev *dev, void *data)
>  	add_token_u8(&err, dev, OPAL_ENDNAME);
>  	add_token_u8(&err, dev, OPAL_ENDLIST);
>  	add_token_u8(&err, dev, OPAL_ENDNAME);
> -	add_token_u8(&err, dev, OPAL_ENDLIST);
>  
>  	if (err) {
>  		pr_debug("Error building add user to locking range command.\n");
> @@ -1755,7 +1743,6 @@ static int lock_unlock_locking_range(struct opal_dev *dev, void *data)
>  
>  	add_token_u8(&err, dev, OPAL_ENDLIST);
>  	add_token_u8(&err, dev, OPAL_ENDNAME);
> -	add_token_u8(&err, dev, OPAL_ENDLIST);
>  
>  	if (err) {
>  		pr_debug("Error building SET command.\n");
> @@ -1843,11 +1830,8 @@ static int activate_lsp(struct opal_dev *dev, void *data)
>  		}
>  		add_token_u8(&err, dev, OPAL_ENDLIST);
>  		add_token_u8(&err, dev, OPAL_ENDNAME);
> -		add_token_u8(&err, dev, OPAL_ENDLIST);
> -
>  	} else {
>  		add_token_u8(&err, dev, OPAL_STARTLIST);
> -		add_token_u8(&err, dev, OPAL_ENDLIST);
>  	}
>  
>  	if (err) {
> @@ -1904,7 +1888,6 @@ static int get_lsp_lifecycle(struct opal_dev *dev, void *data)
>  	add_token_u8(&err, dev, 6); /* Lifecycle Column */
>  	add_token_u8(&err, dev, OPAL_ENDNAME);
>  
> -	add_token_u8(&err, dev, OPAL_ENDLIST);
>  	add_token_u8(&err, dev, OPAL_ENDLIST);
>  
>  	if (err) {
> @@ -1964,8 +1947,6 @@ static int get_msid_cpin_pin(struct opal_dev *dev, void *data)
>  	add_token_u8(&err, dev, 4); /* End Column */
>  	add_token_u8(&err, dev, 3); /* Lifecycle Column */
>  	add_token_u8(&err, dev, OPAL_ENDNAME);
> -
> -	add_token_u8(&err, dev, OPAL_ENDLIST);
>  	add_token_u8(&err, dev, OPAL_ENDLIST);
>  
>  	if (err) {
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