[PATCH] Increase usbfs bulk buffer size

[Markus Rechberger]

Hi,

this patch increases the maximum buffersize for bulk transfers, our
devices support at least up to 46k bytes for bulk transfers.
This patch allows us to lower the iterations between kernel and
userspace and lower the system pressure.

Signed-off-by: Markus Rechberger <mrechberger@xxxxxxxxx>

diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index 37518df..ad193d0 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -107,7 +107,7 @@ enum snoop_when {

 #define USB_DEVICE_DEV         MKDEV(USB_DEVICE_MAJOR, 0)

-#define        MAX_USBFS_BUFFER_SIZE   16384
+#define        MAX_USBFS_BUFFER_SIZE   46080


 static int connected(struct dev_state *ps)
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index 37518df..ad193d0 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -107,7 +107,7 @@ enum snoop_when {
 
 #define USB_DEVICE_DEV		MKDEV(USB_DEVICE_MAJOR, 0)
 
-#define	MAX_USBFS_BUFFER_SIZE	16384
+#define	MAX_USBFS_BUFFER_SIZE	46080
 
 
 static int connected(struct dev_state *ps)