Commit f903a20d1fc0e99741da671095c6b9ac7c13c7ae
Committed by
Marek Vasut
Marek Vasut
1 parent
4edcf0a3df
Exists in
master
and in
53 other branches
usb: Use get_unaligned() in usb_endpoint_maxp() for wMaxPacketSize
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>
Showing 1 changed file with 2 additions and 1 deletions Side-by-side Diff
include/linux/usb/ch9.h
| ... | ... | @@ -35,6 +35,7 @@ |
| 35 | 35 | |
| 36 | 36 | #include <linux/types.h> /* __u8 etc */ |
| 37 | 37 | #include <asm/byteorder.h> /* le16_to_cpu */ |
| 38 | +#include <asm/unaligned.h> /* get_unaligned() */ | |
| 38 | 39 | |
| 39 | 40 | /*-------------------------------------------------------------------------*/ |
| 40 | 41 | |
| ... | ... | @@ -596,7 +597,7 @@ |
| 596 | 597 | */ |
| 597 | 598 | static inline int usb_endpoint_maxp(const struct usb_endpoint_descriptor *epd) |
| 598 | 599 | { |
| 599 | - return __le16_to_cpu(epd->wMaxPacketSize); | |
| 600 | + return __le16_to_cpu(get_unaligned(&epd->wMaxPacketSize)); | |
| 600 | 601 | } |
| 601 | 602 | |
| 602 | 603 | static inline int usb_endpoint_interrupt_type( |