From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DB4A356458; Thu, 13 Jun 2024 12:42:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718282575; cv=none; b=G3S8pouxKVtHUJjI9ex0LLzZy5knjDCISJEOPigjCnB+MG9uD+kgWypDc6ZhjCw4y7l5DAEw/ug5ZvQQwCcquko2GW8tSkw2o8sdMvlm+LMi3NIwOauojAl7y/1gv/awYQthVjIhU3iJpgpFrSCp+gQFxWQWSONmHHziBe4UxA0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718282575; c=relaxed/simple; bh=jaz7ZNxztLYHw9oKOn5vBW3wHe5GZuxE0wB4W3u8DvY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=dtzqN+stHWbemfqahJP8KpDaDRfWmFEwKCdRZN29UZAIwIonEhtRuY9TQsAOanjqTMjJeAzeu6g4zXJ79k1B1QbZQvXjDTvDrMcv178a7PM5Xu2+4g03rVTZnq+eLXDHAIM/uM6s7dfcnFvlS/HM9tjDBqYmF3KuT8vZGfPgcsI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=boQszd73; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="boQszd73" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 62753C2BBFC; Thu, 13 Jun 2024 12:42:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1718282574; bh=jaz7ZNxztLYHw9oKOn5vBW3wHe5GZuxE0wB4W3u8DvY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=boQszd73QIP89LSYt/y09T/t+M5kuG4MPjGv3SnISiAb6kxKyaJLQH0fAas6myTUa j8rZvmUtQ4tV/sKE8Iv5tqDkFyEM7N9YEFZAin6Q56miGNWS2yIBfyi9jXIzVq5J6f 7r6AubMdCmGwYmL366Q7sYMYyyUyLvuNiHA/T+Xs= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Parthiban Veerasooran , Simon Horman , Woojung Huh , Paolo Abeni , Sasha Levin Subject: [PATCH 5.15 316/402] net: usb: smsc95xx: fix changing LED_SEL bit value updated from EEPROM Date: Thu, 13 Jun 2024 13:34:33 +0200 Message-ID: <20240613113314.466803320@linuxfoundation.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240613113302.116811394@linuxfoundation.org> References: <20240613113302.116811394@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Parthiban Veerasooran [ Upstream commit 52a2f0608366a629d43dacd3191039c95fef74ba ] LED Select (LED_SEL) bit in the LED General Purpose IO Configuration register is used to determine the functionality of external LED pins (Speed Indicator, Link and Activity Indicator, Full Duplex Link Indicator). The default value for this bit is 0 when no EEPROM is present. If a EEPROM is present, the default value is the value of the LED Select bit in the Configuration Flags of the EEPROM. A USB Reset or Lite Reset (LRST) will cause this bit to be restored to the image value last loaded from EEPROM, or to be set to 0 if no EEPROM is present. While configuring the dual purpose GPIO/LED pins to LED outputs in the LED General Purpose IO Configuration register, the LED_SEL bit is changed as 0 and resulting the configured value from the EEPROM is cleared. The issue is fixed by using read-modify-write approach. Fixes: f293501c61c5 ("smsc95xx: configure LED outputs") Signed-off-by: Parthiban Veerasooran Reviewed-by: Simon Horman Reviewed-by: Woojung Huh Link: https://lore.kernel.org/r/20240523085314.167650-1-Parthiban.Veerasooran@microchip.com Signed-off-by: Paolo Abeni Signed-off-by: Sasha Levin --- drivers/net/usb/smsc95xx.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c index 10fae3989fbdb..8a38939dd57e4 100644 --- a/drivers/net/usb/smsc95xx.c +++ b/drivers/net/usb/smsc95xx.c @@ -842,7 +842,7 @@ static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm) static int smsc95xx_reset(struct usbnet *dev) { struct smsc95xx_priv *pdata = dev->driver_priv; - u32 read_buf, write_buf, burst_cap; + u32 read_buf, burst_cap; int ret = 0, timeout; netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n"); @@ -984,10 +984,13 @@ static int smsc95xx_reset(struct usbnet *dev) return ret; netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf); + ret = smsc95xx_read_reg(dev, LED_GPIO_CFG, &read_buf); + if (ret < 0) + return ret; /* Configure GPIO pins as LED outputs */ - write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED | - LED_GPIO_CFG_FDX_LED; - ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf); + read_buf |= LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED | + LED_GPIO_CFG_FDX_LED; + ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, read_buf); if (ret < 0) return ret; -- 2.43.0