[PATCH] lightnvm: fix some WARN() messages

[PATCH] lightnvm: fix some WARN() messages

[Dan Carpenter]

WARN_ON() takes a condition, not an error message.  I slightly tweaked
some conditions so hopefully it's more clear.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

diff --git a/drivers/lightnvm/pblk-read.c b/drivers/lightnvm/pblk-read.c
index eff0982c076f..bce7ed5fc73f 100644
--- a/drivers/lightnvm/pblk-read.c
+++ b/drivers/lightnvm/pblk-read.c
@@ -49,8 +49,8 @@ static void pblk_read_ppalist_rq(struct pblk *pblk, struct nvm_rq *rqd,
 	int i, j = 0;
 
 	/* logic error: lba out-of-bounds. Ignore read request */
-	if (!(blba + nr_secs < pblk->rl.nr_secs)) {
-		WARN_ON("pblk: read lbas out of bounds\n");
+	if (blba + nr_secs >= pblk->rl.nr_secs) {
+		WARN(1, "pblk: read lbas out of bounds\n");
 		return;
 	}
 
@@ -254,8 +254,8 @@ static void pblk_read_rq(struct pblk *pblk, struct nvm_rq *rqd,
 	sector_t lba = pblk_get_lba(bio);
 
 	/* logic error: lba out-of-bounds. Ignore read request */
-	if (!(lba < pblk->rl.nr_secs)) {
-		WARN_ON("pblk: read lba out of bounds\n");
+	if (lba >= pblk->rl.nr_secs) {
+		WARN(1, "pblk: read lba out of bounds\n");
 		return;
 	}
 
@@ -411,8 +411,8 @@ static int read_rq_gc(struct pblk *pblk, struct nvm_rq *rqd,
 	int valid_secs = 0;
 
 	/* logic error: lba out-of-bounds */
-	if (!(lba < pblk->rl.nr_secs)) {
-		WARN_ON("pblk: read lba out of bounds\n");
+	if (lba >= pblk->rl.nr_secs) {
+		WARN(1, "pblk: read lba out of bounds\n");
 		goto out;
 	}
 
diff --git a/drivers/lightnvm/pblk-write.c b/drivers/lightnvm/pblk-write.c
index 02c415b957d4..56547ca87926 100644
--- a/drivers/lightnvm/pblk-write.c
+++ b/drivers/lightnvm/pblk-write.c
@@ -141,7 +141,7 @@ static void pblk_end_w_fail(struct pblk *pblk, struct nvm_rq *rqd)
 
 		/* Logic error */
 		if (bit > c_ctx->nr_valid) {
-			WARN_ON_ONCE("pblk: corrupted write request\n");
+			WARN_ONCE(1, "pblk: corrupted write request\n");
 			goto out;
 		}
 
diff --git a/drivers/lightnvm/pblk-recovery.c b/drivers/lightnvm/pblk-recovery.c
index 0d50f415cfde..f8f85087cd3c 100644
--- a/drivers/lightnvm/pblk-recovery.c
+++ b/drivers/lightnvm/pblk-recovery.c
@@ -167,7 +167,7 @@ static int pblk_recov_l2p_from_emeta(struct pblk *pblk, struct pblk_line *line)
 		if (le64_to_cpu(lba_list[i]) = ADDR_EMPTY) {
 			spin_lock(&line->lock);
 			if (test_and_set_bit(i, line->invalid_bitmap))
-				WARN_ON_ONCE("pblk: rec. double invalidate:\n");
+				WARN_ONCE(1, "pblk: rec. double invalidate:\n");
 			else
 				line->vsc--;
 			spin_unlock(&line->lock);

Re: [PATCH] lightnvm: fix some WARN() messages

[Matias Bjørling]

On 04/13/2017 09:36 PM, Dan Carpenter wrote:
> WARN_ON() takes a condition, not an error message.  I slightly tweaked
> some conditions so hopefully it's more clear.
>
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
>
> diff --git a/drivers/lightnvm/pblk-read.c b/drivers/lightnvm/pblk-read.c
> index eff0982c076f..bce7ed5fc73f 100644
> --- a/drivers/lightnvm/pblk-read.c
> +++ b/drivers/lightnvm/pblk-read.c
> @@ -49,8 +49,8 @@ static void pblk_read_ppalist_rq(struct pblk *pblk, struct nvm_rq *rqd,
>  	int i, j = 0;
>
>  	/* logic error: lba out-of-bounds. Ignore read request */
> -	if (!(blba + nr_secs < pblk->rl.nr_secs)) {
> -		WARN_ON("pblk: read lbas out of bounds\n");
> +	if (blba + nr_secs >= pblk->rl.nr_secs) {
> +		WARN(1, "pblk: read lbas out of bounds\n");
>  		return;
>  	}
>
> @@ -254,8 +254,8 @@ static void pblk_read_rq(struct pblk *pblk, struct nvm_rq *rqd,
>  	sector_t lba = pblk_get_lba(bio);
>
>  	/* logic error: lba out-of-bounds. Ignore read request */
> -	if (!(lba < pblk->rl.nr_secs)) {
> -		WARN_ON("pblk: read lba out of bounds\n");
> +	if (lba >= pblk->rl.nr_secs) {
> +		WARN(1, "pblk: read lba out of bounds\n");
>  		return;
>  	}
>
> @@ -411,8 +411,8 @@ static int read_rq_gc(struct pblk *pblk, struct nvm_rq *rqd,
>  	int valid_secs = 0;
>
>  	/* logic error: lba out-of-bounds */
> -	if (!(lba < pblk->rl.nr_secs)) {
> -		WARN_ON("pblk: read lba out of bounds\n");
> +	if (lba >= pblk->rl.nr_secs) {
> +		WARN(1, "pblk: read lba out of bounds\n");
>  		goto out;
>  	}
>
> diff --git a/drivers/lightnvm/pblk-write.c b/drivers/lightnvm/pblk-write.c
> index 02c415b957d4..56547ca87926 100644
> --- a/drivers/lightnvm/pblk-write.c
> +++ b/drivers/lightnvm/pblk-write.c
> @@ -141,7 +141,7 @@ static void pblk_end_w_fail(struct pblk *pblk, struct nvm_rq *rqd)
>
>  		/* Logic error */
>  		if (bit > c_ctx->nr_valid) {
> -			WARN_ON_ONCE("pblk: corrupted write request\n");
> +			WARN_ONCE(1, "pblk: corrupted write request\n");
>  			goto out;
>  		}
>
> diff --git a/drivers/lightnvm/pblk-recovery.c b/drivers/lightnvm/pblk-recovery.c
> index 0d50f415cfde..f8f85087cd3c 100644
> --- a/drivers/lightnvm/pblk-recovery.c
> +++ b/drivers/lightnvm/pblk-recovery.c
> @@ -167,7 +167,7 @@ static int pblk_recov_l2p_from_emeta(struct pblk *pblk, struct pblk_line *line)
>  		if (le64_to_cpu(lba_list[i]) = ADDR_EMPTY) {
>  			spin_lock(&line->lock);
>  			if (test_and_set_bit(i, line->invalid_bitmap))
> -				WARN_ON_ONCE("pblk: rec. double invalidate:\n");
> +				WARN_ONCE(1, "pblk: rec. double invalidate:\n");
>  			else
>  				line->vsc--;
>  			spin_unlock(&line->lock);
>

Hehe, yep. That was slightly misused. Thanks for pointing it out. I've 
applied it for 4.12.