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ieee1394: sbp2: use a better wildcard for blacklist

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0x000000 could be a valid value to match against, but anything bigger
than 0xffffff cannot.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Stefan Richter 2006-12-30 15:37:09 +01:00
parent dcb7112984
commit 4618fd3001
1 changed files with 8 additions and 12 deletions
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20
drivers/ieee1394/sbp2.c
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@ -308,6 +308,8 @@ static struct scsi_host_template sbp2_shost_template = {
.sdev_attrs = sbp2_sysfs_sdev_attrs,
};
/* for match-all entries in sbp2_workarounds_table */
#define SBP2_ROM_VALUE_WILDCARD 0x1000000
/*
* List of devices with known bugs.
@ -329,22 +331,14 @@ static const struct {
},
/* Initio bridges, actually only needed for some older ones */ {
.firmware_revision = 0x000200,
.model_id = SBP2_ROM_VALUE_WILDCARD,
.workarounds = SBP2_WORKAROUND_INQUIRY_36,
},
/* Symbios bridge */ {
.firmware_revision = 0xa0b800,
.model_id = SBP2_ROM_VALUE_WILDCARD,
.workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
},
/*
* Note about the following Apple iPod blacklist entries:
*
* There are iPods (2nd gen, 3rd gen) with model_id==0. Since our
* matching logic treats 0 as a wildcard, we cannot match this ID
* without rewriting the matching routine. Fortunately these iPods
* do not feature the read_capacity bug according to one report.
* Read_capacity behaviour as well as model_id could change due to
* Apple-supplied firmware updates though.
*/
/* iPod 4th generation */ {
.firmware_revision = 0x0a2700,
.model_id = 0x000021,
@ -1307,11 +1301,13 @@ static void sbp2_parse_unit_directory(struct sbp2_lu *lu,
if (!(workarounds & SBP2_WORKAROUND_OVERRIDE))
for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) {
if (sbp2_workarounds_table[i].firmware_revision &&
if (sbp2_workarounds_table[i].firmware_revision !=
SBP2_ROM_VALUE_WILDCARD &&
sbp2_workarounds_table[i].firmware_revision !=
(firmware_revision & 0xffff00))
continue;
if (sbp2_workarounds_table[i].model_id &&
if (sbp2_workarounds_table[i].model_id !=
SBP2_ROM_VALUE_WILDCARD &&
sbp2_workarounds_table[i].model_id != ud->model_id)
continue;
workarounds |= sbp2_workarounds_table[i].workarounds;