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staging/ipack: Fix bug introduced by IPack device matching

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~0 can not be casted to u8.  Instead of using the IPACK_ANY_ID for the format
field we introduce a new IPACK_ANY_FORMAT specifically for that field and
defined as 0xff.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jens Taprogge <jens.taprogge@taprogge.org>
Acked-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jens Taprogge 2012-09-07 10:29:19 +02:00 committed by Greg Kroah-Hartman
parent 7953e44cef
commit 5948ae27fb
3 changed files with 4 additions and 2 deletions
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3
drivers/staging/ipack/ipack.c
View File

@ -31,7 +31,8 @@ static inline const struct ipack_device_id *
ipack_match_one_device(const struct ipack_device_id *id,
const struct ipack_device *device)
{
if ((id->format == IPACK_ANY_ID || id->format == device->id_format) &&
if ((id->format == IPACK_ANY_FORMAT ||
id->format == device->id_format) &&
(id->vendor == IPACK_ANY_ID || id->vendor == device->id_vendor) &&
(id->device == IPACK_ANY_ID || id->device == device->id_device))
return id;

1
include/linux/mod_devicetable.h
View File

@ -600,6 +600,7 @@ struct x86_cpu_id {
#define X86_MODEL_ANY 0
#define X86_FEATURE_ANY 0 /* Same as FPU, you can't test for that */
#define IPACK_ANY_FORMAT 0xff
#define IPACK_ANY_ID (~0)
struct ipack_device_id {
__u8 format; /* Format version or IPACK_ANY_ID */

2
scripts/mod/file2alias.c
View File

@ -973,7 +973,7 @@ static int do_ipack_entry(const char *filename,
id->vendor = TO_NATIVE(id->vendor);
id->device = TO_NATIVE(id->device);
strcpy(alias, "ipack:");
ADD(alias, "f", id->format != IPACK_ANY_ID, id->format);
ADD(alias, "f", id->format != IPACK_ANY_FORMAT, id->format);
ADD(alias, "v", id->vendor != IPACK_ANY_ID, id->vendor);
ADD(alias, "d", id->device != IPACK_ANY_ID, id->device);
add_wildcard(alias);