[PATCH v2] staging: rtl8723bs: use standard error codes in xmit init path

[Hungyu Lin <dennylin0707@gmail.com>]

Replace the use of _SUCCESS/_FAIL return values with standard
kernel return conventions (0 on success, negative errno on failure)
in the xmit initialization path.

Specifically:
- rtw_os_xmit_resource_alloc() now returns 0 or -ENOMEM
- rtw_alloc_hwxmits() now returns 0 or -ENOMEM
- _rtw_init_xmit_priv() updated to propagate error codes and use
  direct truth checks instead of comparing with _FAIL
- caller in os_intfs.c updated accordingly

This improves error propagation and aligns the driver with
kernel coding style.

Signed-off-by: Hungyu Lin <dennylin0707@gmail.com>
---
v2:
- Rework xmit init path to remove _SUCCESS/_FAIL usage
- Convert allocation helpers to return standard error codes
- Update caller to use direct failure checks
- Address review feedback from Ethan Tidmore
---
 drivers/staging/rtl8723bs/core/rtw_xmit.c     | 24 +++++++++----------
 drivers/staging/rtl8723bs/os_dep/os_intfs.c   |  2 +-
 drivers/staging/rtl8723bs/os_dep/xmit_linux.c |  4 ++--
 3 files changed, 15 insertions(+), 15 deletions(-)

diff --git a/drivers/staging/rtl8723bs/core/rtw_xmit.c b/drivers/staging/rtl8723bs/core/rtw_xmit.c
index ea1923023caa..e10592d969e7 100644
--- a/drivers/staging/rtl8723bs/core/rtw_xmit.c
+++ b/drivers/staging/rtl8723bs/core/rtw_xmit.c
@@ -36,7 +36,7 @@ s32 _rtw_init_xmit_priv(struct xmit_priv *pxmitpriv, struct adapter *padapter)
 	int i;
 	struct xmit_buf *pxmitbuf;
 	struct xmit_frame *pxframe;
-	signed int	res = _SUCCESS;
+	signed int	res = 0;
 
 	spin_lock_init(&pxmitpriv->lock);
 	spin_lock_init(&pxmitpriv->lock_sctx);
@@ -73,7 +73,7 @@ s32 _rtw_init_xmit_priv(struct xmit_priv *pxmitpriv, struct adapter *padapter)
 
 	if (!pxmitpriv->pallocated_frame_buf) {
 		pxmitpriv->pxmit_frame_buf = NULL;
-		res = _FAIL;
+		res = -ENOMEM;
 		goto exit;
 	}
 	pxmitpriv->pxmit_frame_buf = (u8 *)N_BYTE_ALIGMENT((SIZE_PTR)(pxmitpriv->pallocated_frame_buf), 4);
@@ -110,7 +110,7 @@ s32 _rtw_init_xmit_priv(struct xmit_priv *pxmitpriv, struct adapter *padapter)
 	pxmitpriv->pallocated_xmitbuf = vzalloc(NR_XMITBUFF * sizeof(struct xmit_buf) + 4);
 
 	if (!pxmitpriv->pallocated_xmitbuf) {
-		res = _FAIL;
+		res = -ENOMEM;
 		goto exit;
 	}
 
@@ -127,10 +127,10 @@ s32 _rtw_init_xmit_priv(struct xmit_priv *pxmitpriv, struct adapter *padapter)
 
 		/* Tx buf allocation may fail sometimes, so sleep and retry. */
 		res = rtw_os_xmit_resource_alloc(padapter, pxmitbuf, (MAX_XMITBUF_SZ + XMITBUF_ALIGN_SZ), true);
-		if (res == _FAIL) {
+		if (res) {
 			msleep(10);
 			res = rtw_os_xmit_resource_alloc(padapter, pxmitbuf, (MAX_XMITBUF_SZ + XMITBUF_ALIGN_SZ), true);
-			if (res == _FAIL)
+			if (res)
 				goto exit;
 		}
 
@@ -160,7 +160,7 @@ s32 _rtw_init_xmit_priv(struct xmit_priv *pxmitpriv, struct adapter *padapter)
 
 	if (!pxmitpriv->xframe_ext_alloc_addr) {
 		pxmitpriv->xframe_ext = NULL;
-		res = _FAIL;
+		res = -ENOMEM;
 		goto exit;
 	}
 	pxmitpriv->xframe_ext = (u8 *)N_BYTE_ALIGMENT((SIZE_PTR)(pxmitpriv->xframe_ext_alloc_addr), 4);
@@ -193,7 +193,7 @@ s32 _rtw_init_xmit_priv(struct xmit_priv *pxmitpriv, struct adapter *padapter)
 	pxmitpriv->pallocated_xmit_extbuf = vzalloc(NR_XMIT_EXTBUFF * sizeof(struct xmit_buf) + 4);
 
 	if (!pxmitpriv->pallocated_xmit_extbuf) {
-		res = _FAIL;
+		res = -ENOMEM;
 		goto exit;
 	}
 
@@ -209,7 +209,7 @@ s32 _rtw_init_xmit_priv(struct xmit_priv *pxmitpriv, struct adapter *padapter)
 		pxmitbuf->buf_tag = XMITBUF_MGNT;
 
 		res = rtw_os_xmit_resource_alloc(padapter, pxmitbuf, MAX_XMIT_EXTBUF_SZ + XMITBUF_ALIGN_SZ, true);
-		if (res == _FAIL)
+		if (res)
 			goto exit;
 
 		pxmitbuf->phead = pxmitbuf->pbuf;
@@ -239,7 +239,7 @@ s32 _rtw_init_xmit_priv(struct xmit_priv *pxmitpriv, struct adapter *padapter)
 			res = rtw_os_xmit_resource_alloc(padapter, pxmitbuf,
 							 MAX_CMDBUF_SZ + XMITBUF_ALIGN_SZ,
 							 true);
-			if (res == _FAIL)
+			if (res)
 				goto exit;
 
 			pxmitbuf->phead = pxmitbuf->pbuf;
@@ -251,7 +251,7 @@ s32 _rtw_init_xmit_priv(struct xmit_priv *pxmitpriv, struct adapter *padapter)
 	}
 
 	res = rtw_alloc_hwxmits(padapter);
-	if (res == _FAIL)
+	if (res)
 		goto exit;
 	rtw_init_hwxmits(pxmitpriv->hwxmits, pxmitpriv->hwxmit_entry);
 
@@ -1868,7 +1868,7 @@ s32 rtw_alloc_hwxmits(struct adapter *padapter)
 	pxmitpriv->hwxmits = kzalloc_objs(*hwxmits, pxmitpriv->hwxmit_entry,
 					  GFP_ATOMIC);
 	if (!pxmitpriv->hwxmits)
-		return _FAIL;
+		return -ENOMEM;
 
 	hwxmits = pxmitpriv->hwxmits;
 
@@ -1893,7 +1893,7 @@ s32 rtw_alloc_hwxmits(struct adapter *padapter)
 	} else {
 	}
 
-	return _SUCCESS;
+	return 0;
 }
 
 void rtw_free_hwxmits(struct adapter *padapter)
diff --git a/drivers/staging/rtl8723bs/os_dep/os_intfs.c b/drivers/staging/rtl8723bs/os_dep/os_intfs.c
index 29939bf5a156..bad2dba73eb6 100644
--- a/drivers/staging/rtl8723bs/os_dep/os_intfs.c
+++ b/drivers/staging/rtl8723bs/os_dep/os_intfs.c
@@ -654,7 +654,7 @@ u8 rtw_init_drv_sw(struct adapter *padapter)
 
 	init_mlme_ext_priv(padapter);
 
-	if (_rtw_init_xmit_priv(&padapter->xmitpriv, padapter) == _FAIL)
+	if (_rtw_init_xmit_priv(&padapter->xmitpriv, padapter))
 		goto free_mlme_ext;
 
 	if (_rtw_init_recv_priv(&padapter->recvpriv, padapter) == _FAIL)
diff --git a/drivers/staging/rtl8723bs/os_dep/xmit_linux.c b/drivers/staging/rtl8723bs/os_dep/xmit_linux.c
index 0be3143fffe5..a8b8545ed25e 100644
--- a/drivers/staging/rtl8723bs/os_dep/xmit_linux.c
+++ b/drivers/staging/rtl8723bs/os_dep/xmit_linux.c
@@ -51,12 +51,12 @@ int rtw_os_xmit_resource_alloc(struct adapter *padapter, struct xmit_buf *pxmitb
 	if (alloc_sz > 0) {
 		pxmitbuf->pallocated_buf = kzalloc(alloc_sz, GFP_KERNEL);
 		if (!pxmitbuf->pallocated_buf)
-			return _FAIL;
+			return -ENOMEM;
 
 		pxmitbuf->pbuf = (u8 *)N_BYTE_ALIGMENT((SIZE_PTR)(pxmitbuf->pallocated_buf), XMITBUF_ALIGN_SZ);
 	}
 
-	return _SUCCESS;
+	return 0;
 }
 
 void rtw_os_xmit_resource_free(struct adapter *padapter, struct xmit_buf *pxmitbuf, u32 free_sz, u8 flag)
-- 
2.34.1