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| author | Heiko Schocher <hs@denx.de> | 2013-06-27 10:04:57 +0200 |
|---|---|---|
| committer | Marek Vasut <marex@denx.de> | 2013-06-30 18:41:08 +0200 |
| commit | b37c4a2baabc61450bb9f8bd16b233a25315c816 (patch) | |
| tree | 769e682eecfcbb34732a74fb6846c12cfd464444 /include/linux/usb | |
| parent | e059a400ad780328cd5ad22c396298cac520c856 (diff) | |
| download | u-boot-imx-b37c4a2baabc61450bb9f8bd16b233a25315c816.zip u-boot-imx-b37c4a2baabc61450bb9f8bd16b233a25315c816.tar.gz u-boot-imx-b37c4a2baabc61450bb9f8bd16b233a25315c816.tar.bz2 | |
usb: fix unaligned access in device_qual()
while playing with dfu, I tapped in an unaligned access
when doing on the host side a "lsusb -d [vendornr]: -v"
I get on the board:
GADGET DRIVER: usb_dnl_dfu
data abort
MAYBE you should read doc/README.arm-unaligned-accesses
pc : [<8ff71db8>] lr : [<8ff75aec>]
sp : 8ef40d18 ip : 00000005 fp : 00000000
r10: 00000000 r9 : 47401410 r8 : 8ef40f38
r7 : 8ef4aae8 r6 : 0000000a r5 : 8ef4ab28 r4 : 8ef4ab80
r3 : 0000000a r2 : 00000006 r1 : 00000006 r0 : 8ef4aae8
Flags: Nzcv IRQs off FIQs on Mode SVC_32
Resetting CPU ...
reason is that in the "struct usb_composite_dev" the
"struct usb_device_descriptor desc;" is on an odd address,
and this struct gets accessed in
drivers/usb/gadget/composite.c device_qual()
Fix it, by align this var "struct desc" fix to an aligned
address.
Signed-off-by: Heiko Schocher <hs@denx.de>
Cc: Marek Vasut <marek.vasut@gmail.com>
Cc: Samuel Egli <samuel.egli@siemens.com>
Diffstat (limited to 'include/linux/usb')
| -rw-r--r-- | include/linux/usb/composite.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/usb/composite.h b/include/linux/usb/composite.h index 53cb095..4f76f88 100644 --- a/include/linux/usb/composite.h +++ b/include/linux/usb/composite.h @@ -331,7 +331,7 @@ struct usb_composite_dev { /* private: */ /* internals */ unsigned int suspended:1; - struct usb_device_descriptor desc; + struct usb_device_descriptor __aligned(CONFIG_SYS_CACHELINE_SIZE) desc; struct list_head configs; struct usb_composite_driver *driver; u8 next_string_id; |