diff mbox series

[net-next,v3,03/18] net: dsa: sja1105: reorder sja1105_first_entry_longer_than with memory allocation

Message ID 20220412121557.3553555-4-jakobkoschel@gmail.com (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series Remove use of list iterator after loop body | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count fail Series longer than 15 patches (and no cover letter)
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers success CCed 17 of 17 maintainers
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 34 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Jakob Koschel April 12, 2022, 12:15 p.m. UTC 
From: Vladimir Oltean <vladimir.oltean@nxp.com>

sja1105_first_entry_longer_than() does not make use of the full struct
sja1105_gate_entry *e, just of e->interval which is set from the passed
entry_time.

This means that if there is a gate conflict, we have allocated e for
nothing, just to free it later. Reorder the memory allocation and the
function call, to avoid that and simplify the error unwind path.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Jakob Koschel <jakobkoschel@gmail.com>
---
 drivers/net/dsa/sja1105/sja1105_vl.c | 17 +++++------------
 1 file changed, 5 insertions(+), 12 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/dsa/sja1105/sja1105_vl.c b/drivers/net/dsa/sja1105/sja1105_vl.c
index 369be2ac3587..e5ea8eb9ec4e 100644
--- a/drivers/net/dsa/sja1105/sja1105_vl.c
+++ b/drivers/net/dsa/sja1105/sja1105_vl.c
@@ -36,7 +36,11 @@  static int sja1105_insert_gate_entry(struct sja1105_gating_config *gating_cfg,
 {
 	struct sja1105_gate_entry *e;
 	struct list_head *pos;
-	int rc;
+
+	pos = sja1105_first_entry_longer_than(&gating_cfg->entries,
+					      entry_time, extack);
+	if (IS_ERR(pos))
+		return PTR_ERR(pos);
 
 	e = kzalloc(sizeof(*e), GFP_KERNEL);
 	if (!e)
@@ -45,22 +49,11 @@  static int sja1105_insert_gate_entry(struct sja1105_gating_config *gating_cfg,
 	e->rule = rule;
 	e->gate_state = gate_state;
 	e->interval = entry_time;
-
-	pos = sja1105_first_entry_longer_than(&gating_cfg->entries,
-					      e->interval, extack);
-	if (IS_ERR(pos)) {
-		rc = PTR_ERR(pos);
-		goto err;
-	}
-
 	list_add(&e->list, pos->prev);
 
 	gating_cfg->num_entries++;
 
 	return 0;
-err:
-	kfree(e);
-	return rc;
 }
 
 /* The gate entries contain absolute times in their e->interval field. Convert