[U-Boot] [PATCH] Lower USB_MAX_XFER_BLK to 32767 by default for trimslice

[Nicolas Chauvet]

I'm experiencing an issue when loading a generic distro initramfs
on trimslice-pro (with ssd using ehci) with the default value of
65535 for USB_MAX_XFER_BLK
 EHCI timed out on TD - token=0x80008d80

As adviced by Marek on IRC, using a lower value for
USB_MAX_XFER_BLK allows to load the file

Tested values on tegra20-trimslice:
4095 ok
32767 ok
32768 timeout
36864 timeout
40960 timeout
49150 timeout

Tested on current u-boot master

Signed-off-by: Nicolas Chauvet <kwizart at gmail.com>
---
 common/usb_storage.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/common/usb_storage.c b/common/usb_storage.c
index 7e6e52d..c69a7f7 100644
--- a/common/usb_storage.c
+++ b/common/usb_storage.c
@@ -106,7 +106,7 @@ struct us_data {
  * enough free heap space left, but the SCSI READ(10) and WRITE(10) commands are
  * limited to 65535 blocks.
  */
-#define USB_MAX_XFER_BLK	65535
+#define USB_MAX_XFER_BLK	32767
 #else
 #define USB_MAX_XFER_BLK	20
 #endif
-- 
2.4.11