HID: core: increase HID report buffer size to 8KiB

commit 84a4062632462c4320704fcdf8e99e89e94c0aba upstream.

We have a HID touch device that reports its opens and shorts test
results in HID buffers of size 8184 bytes. The maximum size of the HID
buffer is currently set to 4096 bytes, causing probe of this device to
fail. With this patch we increase the maximum size of the HID buffer to
8192 bytes, making device probe and acquisition of said buffers succeed.

Signed-off-by: Johan Korsnes <jkorsnes@cisco.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Armando Visconti <armando.visconti@st.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/include/linux/hid.h b/include/linux/hid.h
index cd41f20..875f711 100644 (file)
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -492,7 +492,7 @@ struct hid_report_enum {
 };
 
 #define HID_MIN_BUFFER_SIZE    64              /* make sure there is at least a packet size of space */
-#define HID_MAX_BUFFER_SIZE    4096            /* 4kb */
+#define HID_MAX_BUFFER_SIZE    8192            /* 8kb */
 #define HID_CONTROL_FIFO_SIZE  256             /* to init devices with >100 reports */
 #define HID_OUTPUT_FIFO_SIZE   64