From d7475386bb75ec4e49be66d83775edb043dbfb43 Mon Sep 17 00:00:00 2001 From: Allen Martin Date: Wed, 24 Oct 2012 08:32:04 +0000 Subject: [PATCH] USB: make usb_kbd obey USB DMA alignment requirements Change usb_kbd driver to obey alignment requirements for USB DMA on the buffer used for data transfer. This is necessary for architectures that enable dcache and enable USB DMA. Signed-off-by: Allen Martin Tested-by: Stephen Warren Reviewed-by: Stephen Warren --- common/usb_kbd.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/common/usb_kbd.c b/common/usb_kbd.c index 19f01db1ca..24467cec14 100644 --- a/common/usb_kbd.c +++ b/common/usb_kbd.c @@ -112,7 +112,7 @@ struct usb_kbd_pdata { uint32_t usb_out_pointer; uint8_t usb_kbd_buffer[USB_KBD_BUFFER_LEN]; - uint8_t new[8]; + uint8_t *new; uint8_t old[8]; uint8_t flags; @@ -435,6 +435,9 @@ static int usb_kbd_probe(struct usb_device *dev, unsigned int ifnum) /* Clear private data */ memset(data, 0, sizeof(struct usb_kbd_pdata)); + /* allocate input buffer aligned and sized to USB DMA alignment */ + data->new = memalign(USB_DMA_MINALIGN, roundup(8, USB_DMA_MINALIGN)); + /* Insert private data into USB device structure */ dev->privptr = data; -- 2.39.5