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* [PATCH net-next] octeontx2-af: debugfs: delete dead code
@ 2020-12-02  6:57 Dan Carpenter
  2020-12-02  7:15 ` Sunil Kovvuri
  0 siblings, 1 reply; 3+ messages in thread
From: Dan Carpenter @ 2020-12-02  6:57 UTC (permalink / raw)
  To: Sunil Goutham
  Cc: Linu Cherian, Geetha sowjanya, Jerin Jacob, David S. Miller,
	Jakub Kicinski, netdev, linux-kernel, kernel-janitors

These debugfs never return NULL so all this code will never be run.

In the normal case, (and in this case particularly), the debugfs
functions are not supposed to be checked for errors so all this error
checking code can be safely deleted.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
 .../marvell/octeontx2/af/rvu_debugfs.c        | 255 ++++--------------
 1 file changed, 52 insertions(+), 203 deletions(-)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c
index c383efc6b90c..d27543c1a166 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_debugfs.c
@@ -1368,119 +1368,52 @@ RVU_DEBUG_SEQ_FOPS(nix_qsize, nix_qsize_display, nix_qsize_write);
 
 static void rvu_dbg_nix_init(struct rvu *rvu, int blkaddr)
 {
-	const struct device *dev = &rvu->pdev->dev;
 	struct nix_hw *nix_hw;
-	struct dentry *pfile;
 
 	if (!is_block_implemented(rvu->hw, blkaddr))
 		return;
 
 	if (blkaddr = BLKADDR_NIX0) {
 		rvu->rvu_dbg.nix = debugfs_create_dir("nix", rvu->rvu_dbg.root);
-		if (!rvu->rvu_dbg.nix) {
-			dev_err(rvu->dev, "create debugfs dir failed for nix\n");
-			return;
-		}
 		nix_hw = &rvu->hw->nix[0];
 	} else {
 		rvu->rvu_dbg.nix = debugfs_create_dir("nix1",
 						      rvu->rvu_dbg.root);
-		if (!rvu->rvu_dbg.nix) {
-			dev_err(rvu->dev,
-				"create debugfs dir failed for nix1\n");
-			return;
-		}
 		nix_hw = &rvu->hw->nix[1];
 	}
 
-	pfile = debugfs_create_file("sq_ctx", 0600, rvu->rvu_dbg.nix, nix_hw,
-				    &rvu_dbg_nix_sq_ctx_fops);
-	if (!pfile)
-		goto create_failed;
-
-	pfile = debugfs_create_file("rq_ctx", 0600, rvu->rvu_dbg.nix, nix_hw,
-				    &rvu_dbg_nix_rq_ctx_fops);
-	if (!pfile)
-		goto create_failed;
-
-	pfile = debugfs_create_file("cq_ctx", 0600, rvu->rvu_dbg.nix, nix_hw,
-				    &rvu_dbg_nix_cq_ctx_fops);
-	if (!pfile)
-		goto create_failed;
-
-	pfile = debugfs_create_file("ndc_tx_cache", 0600, rvu->rvu_dbg.nix,
-				    nix_hw, &rvu_dbg_nix_ndc_tx_cache_fops);
-	if (!pfile)
-		goto create_failed;
-
-	pfile = debugfs_create_file("ndc_rx_cache", 0600, rvu->rvu_dbg.nix,
-				    nix_hw, &rvu_dbg_nix_ndc_rx_cache_fops);
-	if (!pfile)
-		goto create_failed;
-
-	pfile = debugfs_create_file("ndc_tx_hits_miss", 0600, rvu->rvu_dbg.nix,
-				    nix_hw,
-				    &rvu_dbg_nix_ndc_tx_hits_miss_fops);
-	if (!pfile)
-		goto create_failed;
-
-	pfile = debugfs_create_file("ndc_rx_hits_miss", 0600, rvu->rvu_dbg.nix,
-				    nix_hw,
-				    &rvu_dbg_nix_ndc_rx_hits_miss_fops);
-	if (!pfile)
-		goto create_failed;
-
-	pfile = debugfs_create_file("qsize", 0600, rvu->rvu_dbg.nix, rvu,
-				    &rvu_dbg_nix_qsize_fops);
-	if (!pfile)
-		goto create_failed;
-
-	return;
-create_failed:
-	dev_err(dev,
-		"Failed to create debugfs dir/file for NIX blk\n");
-	debugfs_remove_recursive(rvu->rvu_dbg.nix);
+	debugfs_create_file("sq_ctx", 0600, rvu->rvu_dbg.nix, nix_hw,
+			    &rvu_dbg_nix_sq_ctx_fops);
+	debugfs_create_file("rq_ctx", 0600, rvu->rvu_dbg.nix, nix_hw,
+			    &rvu_dbg_nix_rq_ctx_fops);
+	debugfs_create_file("cq_ctx", 0600, rvu->rvu_dbg.nix, nix_hw,
+			    &rvu_dbg_nix_cq_ctx_fops);
+	debugfs_create_file("ndc_tx_cache", 0600, rvu->rvu_dbg.nix, nix_hw,
+			    &rvu_dbg_nix_ndc_tx_cache_fops);
+	debugfs_create_file("ndc_rx_cache", 0600, rvu->rvu_dbg.nix, nix_hw,
+			    &rvu_dbg_nix_ndc_rx_cache_fops);
+	debugfs_create_file("ndc_tx_hits_miss", 0600, rvu->rvu_dbg.nix, nix_hw,
+			    &rvu_dbg_nix_ndc_tx_hits_miss_fops);
+	debugfs_create_file("ndc_rx_hits_miss", 0600, rvu->rvu_dbg.nix, nix_hw,
+			    &rvu_dbg_nix_ndc_rx_hits_miss_fops);
+	debugfs_create_file("qsize", 0600, rvu->rvu_dbg.nix, rvu,
+			    &rvu_dbg_nix_qsize_fops);
 }
 
 static void rvu_dbg_npa_init(struct rvu *rvu)
 {
-	const struct device *dev = &rvu->pdev->dev;
-	struct dentry *pfile;
-
 	rvu->rvu_dbg.npa = debugfs_create_dir("npa", rvu->rvu_dbg.root);
-	if (!rvu->rvu_dbg.npa)
-		return;
-
-	pfile = debugfs_create_file("qsize", 0600, rvu->rvu_dbg.npa, rvu,
-				    &rvu_dbg_npa_qsize_fops);
-	if (!pfile)
-		goto create_failed;
-
-	pfile = debugfs_create_file("aura_ctx", 0600, rvu->rvu_dbg.npa, rvu,
-				    &rvu_dbg_npa_aura_ctx_fops);
-	if (!pfile)
-		goto create_failed;
-
-	pfile = debugfs_create_file("pool_ctx", 0600, rvu->rvu_dbg.npa, rvu,
-				    &rvu_dbg_npa_pool_ctx_fops);
-	if (!pfile)
-		goto create_failed;
 
-	pfile = debugfs_create_file("ndc_cache", 0600, rvu->rvu_dbg.npa, rvu,
-				    &rvu_dbg_npa_ndc_cache_fops);
-	if (!pfile)
-		goto create_failed;
-
-	pfile = debugfs_create_file("ndc_hits_miss", 0600, rvu->rvu_dbg.npa,
-				    rvu, &rvu_dbg_npa_ndc_hits_miss_fops);
-	if (!pfile)
-		goto create_failed;
-
-	return;
-
-create_failed:
-	dev_err(dev, "Failed to create debugfs dir/file for NPA\n");
-	debugfs_remove_recursive(rvu->rvu_dbg.npa);
+	debugfs_create_file("qsize", 0600, rvu->rvu_dbg.npa, rvu,
+			    &rvu_dbg_npa_qsize_fops);
+	debugfs_create_file("aura_ctx", 0600, rvu->rvu_dbg.npa, rvu,
+			    &rvu_dbg_npa_aura_ctx_fops);
+	debugfs_create_file("pool_ctx", 0600, rvu->rvu_dbg.npa, rvu,
+			    &rvu_dbg_npa_pool_ctx_fops);
+	debugfs_create_file("ndc_cache", 0600, rvu->rvu_dbg.npa, rvu,
+			    &rvu_dbg_npa_ndc_cache_fops);
+	debugfs_create_file("ndc_hits_miss", 0600, rvu->rvu_dbg.npa, rvu,
+			    &rvu_dbg_npa_ndc_hits_miss_fops);
 }
 
 #define PRINT_CGX_CUML_NIXRX_STATUS(idx, name)				\
@@ -1614,8 +1547,6 @@ RVU_DEBUG_SEQ_FOPS(cgx_stat, cgx_stat_display, NULL);
 
 static void rvu_dbg_cgx_init(struct rvu *rvu)
 {
-	const struct device *dev = &rvu->pdev->dev;
-	struct dentry *pfile;
 	int i, lmac_id;
 	char dname[20];
 	void *cgx;
@@ -1636,18 +1567,10 @@ static void rvu_dbg_cgx_init(struct rvu *rvu)
 			rvu->rvu_dbg.lmac  				debugfs_create_dir(dname, rvu->rvu_dbg.cgx);
 
-			pfile =	debugfs_create_file("stats", 0600,
-						    rvu->rvu_dbg.lmac, cgx,
-						    &rvu_dbg_cgx_stat_fops);
-			if (!pfile)
-				goto create_failed;
+			debugfs_create_file("stats", 0600, rvu->rvu_dbg.lmac,
+					    cgx, &rvu_dbg_cgx_stat_fops);
 		}
 	}
-	return;
-
-create_failed:
-	dev_err(dev, "Failed to create debugfs dir/file for CGX\n");
-	debugfs_remove_recursive(rvu->rvu_dbg.cgx_root);
 }
 
 /* NPC debugfs APIs */
@@ -1970,33 +1893,14 @@ RVU_DEBUG_SEQ_FOPS(npc_mcam_rules, npc_mcam_show_rules, NULL);
 
 static void rvu_dbg_npc_init(struct rvu *rvu)
 {
-	const struct device *dev = &rvu->pdev->dev;
-	struct dentry *pfile;
-
 	rvu->rvu_dbg.npc = debugfs_create_dir("npc", rvu->rvu_dbg.root);
-	if (!rvu->rvu_dbg.npc)
-		return;
 
-	pfile = debugfs_create_file("mcam_info", 0444, rvu->rvu_dbg.npc,
-				    rvu, &rvu_dbg_npc_mcam_info_fops);
-	if (!pfile)
-		goto create_failed;
-
-	pfile = debugfs_create_file("mcam_rules", 0444, rvu->rvu_dbg.npc,
-				    rvu, &rvu_dbg_npc_mcam_rules_fops);
-	if (!pfile)
-		goto create_failed;
-
-	pfile = debugfs_create_file("rx_miss_act_stats", 0444, rvu->rvu_dbg.npc,
-				    rvu, &rvu_dbg_npc_rx_miss_act_fops);
-	if (!pfile)
-		goto create_failed;
-
-	return;
-
-create_failed:
-	dev_err(dev, "Failed to create debugfs dir/file for NPC\n");
-	debugfs_remove_recursive(rvu->rvu_dbg.npc);
+	debugfs_create_file("mcam_info", 0444, rvu->rvu_dbg.npc, rvu,
+			    &rvu_dbg_npc_mcam_info_fops);
+	debugfs_create_file("mcam_rules", 0444, rvu->rvu_dbg.npc, rvu,
+			    &rvu_dbg_npc_mcam_rules_fops);
+	debugfs_create_file("rx_miss_act_stats", 0444, rvu->rvu_dbg.npc, rvu,
+			    &rvu_dbg_npc_rx_miss_act_fops);
 }
 
 /* CPT debugfs APIs */
@@ -2205,84 +2109,35 @@ RVU_DEBUG_SEQ_FOPS(cpt_pc, cpt_pc_display, NULL);
 
 static void rvu_dbg_cpt_init(struct rvu *rvu)
 {
-	const struct device *dev = &rvu->pdev->dev;
-	struct dentry *pfile;
-
 	if (!is_block_implemented(rvu->hw, BLKADDR_CPT0))
 		return;
 
 	rvu->rvu_dbg.cpt = debugfs_create_dir("cpt", rvu->rvu_dbg.root);
-	if (!rvu->rvu_dbg.cpt)
-		return;
 
-	pfile = debugfs_create_file("cpt_pc", 0600,
-				    rvu->rvu_dbg.cpt, rvu,
-				    &rvu_dbg_cpt_pc_fops);
-	if (!pfile)
-		goto create_failed;
-
-	pfile = debugfs_create_file("cpt_ae_sts", 0600,
-				    rvu->rvu_dbg.cpt, rvu,
-				    &rvu_dbg_cpt_ae_sts_fops);
-	if (!pfile)
-		goto create_failed;
-
-	pfile = debugfs_create_file("cpt_se_sts", 0600,
-				    rvu->rvu_dbg.cpt, rvu,
-				    &rvu_dbg_cpt_se_sts_fops);
-	if (!pfile)
-		goto create_failed;
-
-	pfile = debugfs_create_file("cpt_ie_sts", 0600,
-				    rvu->rvu_dbg.cpt, rvu,
-				    &rvu_dbg_cpt_ie_sts_fops);
-	if (!pfile)
-		goto create_failed;
-
-	pfile = debugfs_create_file("cpt_engines_info", 0600,
-				    rvu->rvu_dbg.cpt, rvu,
-				    &rvu_dbg_cpt_engines_info_fops);
-	if (!pfile)
-		goto create_failed;
-
-	pfile = debugfs_create_file("cpt_lfs_info", 0600,
-				    rvu->rvu_dbg.cpt, rvu,
-				    &rvu_dbg_cpt_lfs_info_fops);
-	if (!pfile)
-		goto create_failed;
-
-	pfile = debugfs_create_file("cpt_err_info", 0600,
-				    rvu->rvu_dbg.cpt, rvu,
-				    &rvu_dbg_cpt_err_info_fops);
-	if (!pfile)
-		goto create_failed;
-
-	return;
-
-create_failed:
-	dev_err(dev, "Failed to create debugfs dir/file for CPT\n");
-	debugfs_remove_recursive(rvu->rvu_dbg.cpt);
+	debugfs_create_file("cpt_pc", 0600, rvu->rvu_dbg.cpt, rvu,
+			    &rvu_dbg_cpt_pc_fops);
+	debugfs_create_file("cpt_ae_sts", 0600, rvu->rvu_dbg.cpt, rvu,
+			    &rvu_dbg_cpt_ae_sts_fops);
+	debugfs_create_file("cpt_se_sts", 0600, rvu->rvu_dbg.cpt, rvu,
+			    &rvu_dbg_cpt_se_sts_fops);
+	debugfs_create_file("cpt_ie_sts", 0600, rvu->rvu_dbg.cpt, rvu,
+			    &rvu_dbg_cpt_ie_sts_fops);
+	debugfs_create_file("cpt_engines_info", 0600, rvu->rvu_dbg.cpt, rvu,
+			    &rvu_dbg_cpt_engines_info_fops);
+	debugfs_create_file("cpt_lfs_info", 0600, rvu->rvu_dbg.cpt, rvu,
+			    &rvu_dbg_cpt_lfs_info_fops);
+	debugfs_create_file("cpt_err_info", 0600, rvu->rvu_dbg.cpt, rvu,
+			    &rvu_dbg_cpt_err_info_fops);
 }
 
 void rvu_dbg_init(struct rvu *rvu)
 {
-	struct device *dev = &rvu->pdev->dev;
-	struct dentry *pfile;
-
 	rvu->rvu_dbg.root = debugfs_create_dir(DEBUGFS_DIR_NAME, NULL);
-	if (!rvu->rvu_dbg.root) {
-		dev_err(rvu->dev, "%s failed\n", __func__);
-		return;
-	}
-	pfile = debugfs_create_file("rsrc_alloc", 0444, rvu->rvu_dbg.root, rvu,
-				    &rvu_dbg_rsrc_status_fops);
-	if (!pfile)
-		goto create_failed;
 
-	pfile = debugfs_create_file("rvu_pf_cgx_map", 0444, rvu->rvu_dbg.root,
-				    rvu, &rvu_dbg_rvu_pf_cgx_map_fops);
-	if (!pfile)
-		goto create_failed;
+	debugfs_create_file("rsrc_alloc", 0444, rvu->rvu_dbg.root, rvu,
+			    &rvu_dbg_rsrc_status_fops);
+	debugfs_create_file("rvu_pf_cgx_map", 0444, rvu->rvu_dbg.root, rvu,
+			    &rvu_dbg_rvu_pf_cgx_map_fops);
 
 	rvu_dbg_npa_init(rvu);
 	rvu_dbg_nix_init(rvu, BLKADDR_NIX0);
@@ -2291,12 +2146,6 @@ void rvu_dbg_init(struct rvu *rvu)
 	rvu_dbg_cgx_init(rvu);
 	rvu_dbg_npc_init(rvu);
 	rvu_dbg_cpt_init(rvu);
-
-	return;
-
-create_failed:
-	dev_err(dev, "Failed to create debugfs dir\n");
-	debugfs_remove_recursive(rvu->rvu_dbg.root);
 }
 
 void rvu_dbg_exit(struct rvu *rvu)
-- 
2.29.2

^ permalink raw reply related	[flat|nested] 3+ messages in thread
* Re: [PATCH net-next] octeontx2-af: debugfs: delete dead code
  2020-12-02  6:57 [PATCH net-next] octeontx2-af: debugfs: delete dead code Dan Carpenter
@ 2020-12-02  7:15 ` Sunil Kovvuri
  2020-12-02 20:01   ` Jakub Kicinski
  0 siblings, 1 reply; 3+ messages in thread
From: Sunil Kovvuri @ 2020-12-02  7:15 UTC (permalink / raw)
  To: Dan Carpenter
  Cc: Sunil Goutham, Linu Cherian, Geetha sowjanya, Jerin Jacob,
	David S. Miller, Jakub Kicinski, Linux Netdev List, LKML,
	kernel-janitors

On Wed, Dec 2, 2020 at 12:28 PM Dan Carpenter <dan.carpenter@oracle.com> wrote:
>
> These debugfs never return NULL so all this code will never be run.
>
> In the normal case, (and in this case particularly), the debugfs
> functions are not supposed to be checked for errors so all this error
> checking code can be safely deleted.
>
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
> ---

Thanks for the changes.

^ permalink raw reply	[flat|nested] 3+ messages in thread
* Re: [PATCH net-next] octeontx2-af: debugfs: delete dead code
  2020-12-02  7:15 ` Sunil Kovvuri
@ 2020-12-02 20:01   ` Jakub Kicinski
  0 siblings, 0 replies; 3+ messages in thread
From: Jakub Kicinski @ 2020-12-02 20:01 UTC (permalink / raw)
  To: Sunil Kovvuri
  Cc: Dan Carpenter, Sunil Goutham, Linu Cherian, Geetha sowjanya,
	Jerin Jacob, David S. Miller, Linux Netdev List, LKML,
	kernel-janitors

On Wed, 2 Dec 2020 12:33:00 +0530 Sunil Kovvuri wrote:
> On Wed, Dec 2, 2020 at 12:28 PM Dan Carpenter <dan.carpenter@oracle.com> wrote:
> > These debugfs never return NULL so all this code will never be run.
> >
> > In the normal case, (and in this case particularly), the debugfs
> > functions are not supposed to be checked for errors so all this error
> > checking code can be safely deleted.
> >
> > Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
> 
> Thanks for the changes.

Applied, thanks!

^ permalink raw reply	[flat|nested] 3+ messages in thread
end of thread, other threads:[~2020-12-02 20:01 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2020-12-02  6:57 [PATCH net-next] octeontx2-af: debugfs: delete dead code Dan Carpenter
2020-12-02  7:15 ` Sunil Kovvuri
2020-12-02 20:01   ` Jakub Kicinski

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