From 82dec34df64620a0e06ea6f7020092e41244c3c2 Mon Sep 17 00:00:00 2001 From: Waldemar Rymarkiewicz Date: Thu, 11 Oct 2012 14:03:58 +0200 Subject: [PATCH] NFC: pn533: Fix in/out frame buffer allocation Max frame size should be 264 bytes as per spec and not limited to endpoint MaxPacketSize which is 64 in my case (acr122 reader). Signed-off-by: Waldemar Rymarkiewicz Signed-off-by: Samuel Ortiz --- drivers/nfc/pn533.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/nfc/pn533.c b/drivers/nfc/pn533.c index 97c440a8cd61..f563cac02f31 100644 --- a/drivers/nfc/pn533.c +++ b/drivers/nfc/pn533.c @@ -84,6 +84,10 @@ MODULE_DEVICE_TABLE(usb, pn533_table); #define PN533_LISTEN_TIME 2 /* frame definitions */ +#define PN533_NORMAL_FRAME_MAX_LEN 262 /* 6 (PREAMBLE, SOF, LEN, LCS, TFI) + 254 (DATA) + 2 (DCS, postamble) */ + #define PN533_FRAME_TAIL_SIZE 2 #define PN533_FRAME_SIZE(f) (sizeof(struct pn533_frame) + f->datalen + \ PN533_FRAME_TAIL_SIZE) @@ -2373,9 +2377,9 @@ static int pn533_probe(struct usb_interface *interface, goto error; } - dev->in_frame = kmalloc(dev->in_maxlen, GFP_KERNEL); + dev->in_frame = kmalloc(PN533_NORMAL_FRAME_MAX_LEN, GFP_KERNEL); dev->in_urb = usb_alloc_urb(0, GFP_KERNEL); - dev->out_frame = kmalloc(dev->out_maxlen, GFP_KERNEL); + dev->out_frame = kmalloc(PN533_NORMAL_FRAME_MAX_LEN, GFP_KERNEL); dev->out_urb = usb_alloc_urb(0, GFP_KERNEL); if (!dev->in_frame || !dev->out_frame || -- 2.20.1