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Date: Wed, 15 May 2019 12:56:55 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Oliver Neukum <oneukum@...e.com>, "David S. Miller" <davem@...emloft.net> Subject: [PATCH 5.1 31/46] aqc111: fix double endianness swap on BE From: Oliver Neukum <oneukum@...e.com> [ Upstream commit 2cf672709beb005f6e90cb4edbed6f2218ba953e ] If you are using a function that does a swap in place, you cannot just reuse the buffer on the assumption that it has not been changed. Signed-off-by: Oliver Neukum <oneukum@...e.com> Signed-off-by: David S. Miller <davem@...emloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- drivers/net/usb/aqc111.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) --- a/drivers/net/usb/aqc111.c +++ b/drivers/net/usb/aqc111.c @@ -1428,7 +1428,7 @@ static int aqc111_resume(struct usb_inte { struct usbnet *dev = usb_get_intfdata(intf); struct aqc111_data *aqc111_data = dev->driver_priv; - u16 reg16; + u16 reg16, oldreg16; u8 reg8; netif_carrier_off(dev->net); @@ -1444,9 +1444,11 @@ static int aqc111_resume(struct usb_inte /* Configure RX control register => start operation */ reg16 = aqc111_data->rxctl; reg16 &= ~SFR_RX_CTL_START; + /* needs to be saved in case endianness is swapped */ + oldreg16 = reg16; aqc111_write16_cmd_nopm(dev, AQ_ACCESS_MAC, SFR_RX_CTL, 2, ®16); - reg16 |= SFR_RX_CTL_START; + reg16 = oldreg16 | SFR_RX_CTL_START; aqc111_write16_cmd_nopm(dev, AQ_ACCESS_MAC, SFR_RX_CTL, 2, ®16); aqc111_set_phy_speed(dev, aqc111_data->autoneg,
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