[PATCH v2 05/10] wifi: rtlwifi: rtl8821ae: Reverse PM Capability exists check

From: "Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>
To: "John W. Linville" <linville@tuxdriver.com>,
	Kalle Valo <kvalo@kernel.org>,
	Larry Finger <Larry.Finger@lwfinger.net>,
	linux-wireless@vger.kernel.org, Ping-Ke Shih <pkshih@realtek.com>,
	Bjorn Helgaas <bhelgaas@google.com>,
	linux-kernel@vger.kernel.org
Cc: "Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>
Subject: [PATCH v2 05/10] wifi: rtlwifi: rtl8821ae: Reverse PM Capability exists check
Date: Fri, 24 Nov 2023 10:47:20 +0200	[thread overview]
Message-ID: <20231124084725.12738-6-ilpo.jarvinen@linux.intel.com> (raw)
In-Reply-To: <20231124084725.12738-1-ilpo.jarvinen@linux.intel.com>

Check if PM Capability does not exists and return early which follows
the usual error handling pattern.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
---
 .../wireless/realtek/rtlwifi/rtl8821ae/hw.c   | 45 ++++++++++---------
 1 file changed, 23 insertions(+), 22 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c b/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c
index 6ae37d61a2a2..53cfeed0b030 100644
--- a/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8821ae/hw.c
@@ -2305,30 +2305,31 @@ static void _rtl8821ae_clear_pci_pme_status(struct ieee80211_hw *hw)
 		}
 	} while (cnt++ < 200);
 
-	if (cap_id == 0x01) {
-		/* Get the PM CSR (Control/Status Register),
-		 * The PME_Status is located at PM Capatibility offset 5, bit 7
-		 */
-		pci_read_config_byte(rtlpci->pdev, cap_pointer + 5, &pmcs_reg);
-
-		if (pmcs_reg & BIT(7)) {
-			/* Clear PME_Status with write */
-			pci_write_config_byte(rtlpci->pdev, cap_pointer + 5,
-					      pmcs_reg);
-			/* Read it back to check */
-			pci_read_config_byte(rtlpci->pdev, cap_pointer + 5,
-					     &pmcs_reg);
-			rtl_dbg(rtlpriv, COMP_INIT, DBG_DMESG,
-				"Clear PME status 0x%2x to 0x%2x\n",
-				cap_pointer + 5, pmcs_reg);
-		} else {
-			rtl_dbg(rtlpriv, COMP_INIT, DBG_DMESG,
-				"PME status(0x%2x) = 0x%2x\n",
-				cap_pointer + 5, pmcs_reg);
-		}
-	} else {
+	if (cap_id != 0x01) {
 		rtl_dbg(rtlpriv, COMP_INIT, DBG_WARNING,
 			"Cannot find PME Capability\n");
+		return;
+	}
+
+	/* Get the PM CSR (Control/Status Register),
+	 * The PME_Status is located at PM Capatibility offset 5, bit 7
+	 */
+	pci_read_config_byte(rtlpci->pdev, cap_pointer + 5, &pmcs_reg);
+
+	if (pmcs_reg & BIT(7)) {
+		/* Clear PME_Status with write */
+		pci_write_config_byte(rtlpci->pdev, cap_pointer + 5,
+				      pmcs_reg);
+		/* Read it back to check */
+		pci_read_config_byte(rtlpci->pdev, cap_pointer + 5,
+				     &pmcs_reg);
+		rtl_dbg(rtlpriv, COMP_INIT, DBG_DMESG,
+			"Clear PME status 0x%2x to 0x%2x\n",
+			cap_pointer + 5, pmcs_reg);
+	} else {
+		rtl_dbg(rtlpriv, COMP_INIT, DBG_DMESG,
+			"PME status(0x%2x) = 0x%2x\n",
+			cap_pointer + 5, pmcs_reg);
 	}
 }
 
-- 
2.30.2

