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path: root/drivers/nfc/pn533.c
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Diffstat (limited to 'drivers/nfc/pn533.c')
-rw-r--r--drivers/nfc/pn533.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/nfc/pn533.c b/drivers/nfc/pn533.c
index 97c440a..f563cac 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 ||