Use unaligned access to fetch wMaxPacketSize in usb_endpoint_maxp() api. In its absence we see following data abort message: ============================================================== data abort
MAYBE you should read doc/README.arm-unaligned-accesses
pc : [<bf794e24>] lr : [<bf794e1c>] sp : bf37c7b0 ip : 0000002f fp : 00000000 r10: 00000000 r9 : 00000002 r8 : bf37fecc r7 : 00000001 r6 : bf7d8931 r5 : bf7d891c r4 : bf7d8800 r3 : bf7d65b0 r2 : 00000002 r1 : bf7d65b4 r0 : 00000027 Flags: nZCv IRQs off FIQs off Mode SVC_32 Resetting CPU ...
resetting ... ==============================================================
Signed-off-by: Vivek Gautam gautam.vivek@samsung.com Cc: Ilya Yanok ilya.yanok@cogentembedded.com Cc: Marek Vasut marex@denx.de ---
Based on u-boot-usb/next. Tested with 'u-boot-usb/master' branch.
include/linux/usb/ch9.h | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/include/linux/usb/ch9.h b/include/linux/usb/ch9.h index d1d732c..bd48704 100644 --- a/include/linux/usb/ch9.h +++ b/include/linux/usb/ch9.h @@ -35,6 +35,7 @@
#include <linux/types.h> /* __u8 etc */ #include <asm/byteorder.h> /* le16_to_cpu */ +#include <asm/unaligned.h> /* get_unaligned() */
/*-------------------------------------------------------------------------*/
@@ -596,7 +597,7 @@ static inline int usb_endpoint_is_isoc_out( */ static inline int usb_endpoint_maxp(const struct usb_endpoint_descriptor *epd) { - return __le16_to_cpu(epd->wMaxPacketSize); + return __le16_to_cpu(get_unaligned(&epd->wMaxPacketSize)); }
static inline int usb_endpoint_interrupt_type(