diff options
| author | Tejun Heo <tj@kernel.org> | 2010-05-23 12:59:11 +0200 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2010-05-25 19:41:19 -0400 |
| commit | 43c9c59185eec7caaff6e9dd8d4c93a4d9836a86 (patch) | |
| tree | 6c627f018b6d83c448d059d61fff0fafd8c55b86 | |
| parent | e7ecd435692ca9bde9d124be30b3a26e672ea6c2 (diff) | |
libata: implement dump_id force param
Add dump_id libata.force parameter. If specified, libata dumps full
IDENTIFY data during device configuration. This is to aid debugging.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Larry Baker <baker@usgs.gov>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| -rw-r--r-- | Documentation/kernel-parameters.txt | 2 | ||||
| -rw-r--r-- | drivers/ata/libata-core.c | 9 | ||||
| -rw-r--r-- | include/linux/libata.h | 1 |
3 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index b56ea860da2..a5c05506676 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1252,6 +1252,8 @@ and is between 256 and 4096 characters. It is defined in the file * nohrst, nosrst, norst: suppress hard, soft and both resets. + * dump_id: dump IDENTIFY data. + If there are multiple matching configurations changing the same attribute, the last one is used. diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 8959f42c5b3..06b7e49e039 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -2126,6 +2126,14 @@ retry: goto err_out; } + if (dev->horkage & ATA_HORKAGE_DUMP_ID) { + ata_dev_printk(dev, KERN_DEBUG, "dumping IDENTIFY data, " + "class=%d may_fallback=%d tried_spinup=%d\n", + class, may_fallback, tried_spinup); + print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, + 16, 2, id, ATA_ID_WORDS * sizeof(*id), true); + } + /* Falling back doesn't make sense if ID data was read * successfully at least once. */ @@ -6377,6 +6385,7 @@ static int __init ata_parse_force_one(char **cur, { "3.0Gbps", .spd_limit = 2 }, { "noncq", .horkage_on = ATA_HORKAGE_NONCQ }, { "ncq", .horkage_off = ATA_HORKAGE_NONCQ }, + { "dump_id", .horkage_on = ATA_HORKAGE_DUMP_ID }, { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) }, { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) }, { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) }, diff --git a/include/linux/libata.h b/include/linux/libata.h index 4c5eca4e663..3bad2701bfa 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -386,6 +386,7 @@ enum { ATA_HORKAGE_1_5_GBPS = (1 << 13), /* force 1.5 Gbps */ ATA_HORKAGE_NOSETXFER = (1 << 14), /* skip SETXFER, SATA only */ ATA_HORKAGE_BROKEN_FPDMA_AA = (1 << 15), /* skip AA */ + ATA_HORKAGE_DUMP_ID = (1 << 16), /* dump IDENTIFY data */ /* DMA mask for user DMA control: User visible values; DO NOT renumber */ |