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authorStefan Richter <stefanr@s5r6.in-berlin.de>2006-05-15 22:08:09 +0200
committerLinus Torvalds <torvalds@g5.osdl.org>2006-05-17 21:32:22 -0700
commit679c0cd2dd61c825ab910fdbf347a8b7d1dddec4 (patch)
tree01fc830a4e2e799de61afdb986d0a6c3d5270841 /drivers
parente9a1c52c7b19d10342226c12f170d7ab644427e2 (diff)
[PATCH] sbp2: add ability to override hardwired blacklist
In case the blacklist with workarounds for device bugs yields a false positive, the module load parameter can now also be used as an override instead of an addition to the blacklist. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/ieee1394/sbp2.c29
-rw-r--r--drivers/ieee1394/sbp2.h1
2 files changed, 19 insertions, 11 deletions
diff --git a/drivers/ieee1394/sbp2.c b/drivers/ieee1394/sbp2.c
index 09e9291f184..73555806c48 100644
--- a/drivers/ieee1394/sbp2.c
+++ b/drivers/ieee1394/sbp2.c
@@ -156,6 +156,11 @@ MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device (default = 1)"
* Tell sd_mod to correct the last sector number reported by read_capacity.
* Avoids access beyond actual disk limits on devices with an off-by-one bug.
* Don't use this with devices which don't have this bug.
+ *
+ * - override internal blacklist
+ * Instead of adding to the built-in blacklist, use only the workarounds
+ * specified in the module load parameter.
+ * Useful if a blacklist entry interfered with a non-broken device.
*/
static int sbp2_default_workarounds;
module_param_named(workarounds, sbp2_default_workarounds, int, 0644);
@@ -164,6 +169,7 @@ MODULE_PARM_DESC(workarounds, "Work around device bugs (default = 0"
", 36 byte inquiry = " __stringify(SBP2_WORKAROUND_INQUIRY_36)
", skip mode page 8 = " __stringify(SBP2_WORKAROUND_MODE_SENSE_8)
", fix capacity = " __stringify(SBP2_WORKAROUND_FIX_CAPACITY)
+ ", override internal blacklist = " __stringify(SBP2_WORKAROUND_OVERRIDE)
", or a combination)");
/* legacy parameter */
@@ -1587,17 +1593,18 @@ static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id,
workarounds |= SBP2_WORKAROUND_INQUIRY_36;
}
- for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) {
- if (sbp2_workarounds_table[i].firmware_revision &&
- sbp2_workarounds_table[i].firmware_revision !=
- (firmware_revision & 0xffff00))
- continue;
- if (sbp2_workarounds_table[i].model_id &&
- sbp2_workarounds_table[i].model_id != ud->model_id)
- continue;
- workarounds |= sbp2_workarounds_table[i].workarounds;
- break;
- }
+ if (!(workarounds & SBP2_WORKAROUND_OVERRIDE))
+ for (i = 0; i < ARRAY_SIZE(sbp2_workarounds_table); i++) {
+ if (sbp2_workarounds_table[i].firmware_revision &&
+ sbp2_workarounds_table[i].firmware_revision !=
+ (firmware_revision & 0xffff00))
+ continue;
+ if (sbp2_workarounds_table[i].model_id &&
+ sbp2_workarounds_table[i].model_id != ud->model_id)
+ continue;
+ workarounds |= sbp2_workarounds_table[i].workarounds;
+ break;
+ }
if (workarounds)
SBP2_INFO("Workarounds for node " NODE_BUS_FMT ": 0x%x "
diff --git a/drivers/ieee1394/sbp2.h b/drivers/ieee1394/sbp2.h
index 3af2710f185..f4ccc9d0fba 100644
--- a/drivers/ieee1394/sbp2.h
+++ b/drivers/ieee1394/sbp2.h
@@ -239,6 +239,7 @@ struct sbp2_status_block {
#define SBP2_WORKAROUND_INQUIRY_36 0x2
#define SBP2_WORKAROUND_MODE_SENSE_8 0x4
#define SBP2_WORKAROUND_FIX_CAPACITY 0x8
+#define SBP2_WORKAROUND_OVERRIDE 0x100
/* This is the two dma types we use for cmd_dma below */
enum cmd_dma_types {