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usb: Use get_unaligned() in usb_endpoint_maxp() for wMaxPacketSize

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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>
This commit is contained in:
Vivek Gautam
2013-05-13 15:53:37 +05:30
committed by Marek Vasut
parent 4edcf0a3df
commit f903a20d1f
1 changed files with 2 additions and 1 deletions
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3
include/linux/usb/ch9.h
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@@ -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(