[#7288] SPORT Configuration returns error while argument inconsistent

Submitted By: Alexander Ens

Open Date

2012-08-24 08:41:09

Priority:

Medium Assignee:

Nobody

Status:

Open Fixed In Release:

N/A

Found In Release:

snaps Release:

Trunk

Category:

Drivers Board:

Bluetechnix CM

Processor:

BF537 Silicon Revision:

0.3

Is this bug repeatable?:

Yes Resolution:

Rejected

Uboot version or rev.:

Toolchain version or rev.:

4.3.5

App binary format:

FDPIC

Summary: SPORT Configuration returns error while argument inconsistent

Details:

When configure the SPORT0 with ioctl, following the SPORT documentation in

http://docs.blackfin.uclinux.org/doku.php?id=linux-kernel:drivers:bfin_sport

the ioctl returns an error.

The error is returned from the switch case statement in function "sport_ioctl" in line 792 in /linux-2.6.x/drivers/char/bfin_sport.c

The parameter "cmd = 0" and the macro "SPORT_IOC_CONFIG = -1071624191" is not equal and therefore the default case is executed.

The Linux Kernel is compiled from the git clone:

root:/> uname -a

Linux blackfin 3.5.0-ADI-2012R1-pre-00815-g582dd7d-dirty #73 PREEMPT Wed Aug 22 10:02:03 CEST 2012 blackfin GNU/Linux

The SPORT read in TDM Mode returns an error:

root:/> sport_test -d -r /usr/test

sport_test: ioctl('/dev/sport0', SPORT_IOC_CONFIG) failed: Operation not permitted

When I modify the switch parameter that the case SPORT_IOC_CONFIG is executed, the first if condition with "copy_from_user()" is not executed, because no errors, fine. But now the values of config.word_len and all others members of config are not consistent with the members set in sport_test.c. The same inconsistency is by using my own function.

It looks like, that the arguments of the sport_ioctl() "cmd" and "arg" are not correct committed!?

Follow-ups

--- Sonic Zhang 2012-08-27 00:10:35

It looks the Blackfin toolchain you installed doesn't match the trunk Linux

kernel version. Please use the 2012R1 Blackfin Linux release instead.

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