When sending data over SPI, the maximum expected length is the maximum
nci packet payload + data header size + the frame head room (1 for the
ndlc header) + the frame trail room (0).
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Christophe Ricard <christophe-h.ricard@xxxxxx>
---
drivers/nfc/st-nci/spi.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/nfc/st-nci/spi.c b/drivers/nfc/st-nci/spi.c
index 9a39871..b43f448 100644
--- a/drivers/nfc/st-nci/spi.c
+++ b/drivers/nfc/st-nci/spi.c
@@ -25,6 +25,7 @@
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/nfc.h>
+#include <net/nfc/nci.h>
#include <linux/platform_data/st-nci.h>
#include "st-nci.h"
@@ -94,7 +95,8 @@ static int st_nci_spi_write(void *phy_id, struct sk_buff *skb)
struct st_nci_spi_phy *phy = phy_id;
struct spi_device *dev = phy->spi_dev;
struct sk_buff *skb_rx;
- u8 buf[ST_NCI_SPI_MAX_SIZE];
+ u8 buf[ST_NCI_SPI_MAX_SIZE + NCI_DATA_HDR_SIZE +
+ ST_NCI_FRAME_HEADROOM + ST_NCI_FRAME_TAILROOM];
struct spi_transfer spi_xfer = {
.tx_buf = skb->data,
.rx_buf = buf,
--
2.1.4
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