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-rw-r--r--drivers/scsi/libata-core.c14
-rw-r--r--include/linux/libata.h11
2 files changed, 21 insertions, 4 deletions
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 8fda8228159c..a07ab77d32d6 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -5153,9 +5153,18 @@ static void ata_host_remove(struct ata_port *ap, unsigned int do_unregister)
5153void ata_dev_init(struct ata_device *dev) 5153void ata_dev_init(struct ata_device *dev)
5154{ 5154{
5155 struct ata_port *ap = dev->ap; 5155 struct ata_port *ap = dev->ap;
5156 unsigned long flags;
5157
5158 /* High bits of dev->flags are used to record warm plug
5159 * requests which occur asynchronously. Synchronize using
5160 * host_set lock.
5161 */
5162 spin_lock_irqsave(&ap->host_set->lock, flags);
5163 dev->flags &= ~ATA_DFLAG_INIT_MASK;
5164 spin_unlock_irqrestore(&ap->host_set->lock, flags);
5156 5165
5157 memset((void *)dev, 0, sizeof(*dev)); 5166 memset((void *)dev + ATA_DEVICE_CLEAR_OFFSET, 0,
5158 dev->devno = dev - ap->device; 5167 sizeof(*dev) - ATA_DEVICE_CLEAR_OFFSET);
5159 dev->pio_mask = UINT_MAX; 5168 dev->pio_mask = UINT_MAX;
5160 dev->mwdma_mask = UINT_MAX; 5169 dev->mwdma_mask = UINT_MAX;
5161 dev->udma_mask = UINT_MAX; 5170 dev->udma_mask = UINT_MAX;
@@ -5218,6 +5227,7 @@ static void ata_host_init(struct ata_port *ap, struct Scsi_Host *host,
5218 for (i = 0; i < ATA_MAX_DEVICES; i++) { 5227 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5219 struct ata_device *dev = &ap->device[i]; 5228 struct ata_device *dev = &ap->device[i];
5220 dev->ap = ap; 5229 dev->ap = ap;
5230 dev->devno = i;
5221 ata_dev_init(dev); 5231 ata_dev_init(dev);
5222 } 5232 }
5223 5233
diff --git a/include/linux/libata.h b/include/linux/libata.h
index d4a668cf143b..aa14eda0656c 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -130,6 +130,7 @@ enum {
130 ATA_DFLAG_CFG_MASK = (1 << 8) - 1, 130 ATA_DFLAG_CFG_MASK = (1 << 8) - 1,
131 131
132 ATA_DFLAG_PIO = (1 << 8), /* device currently in PIO mode */ 132 ATA_DFLAG_PIO = (1 << 8), /* device currently in PIO mode */
133 ATA_DFLAG_INIT_MASK = (1 << 16) - 1,
133 134
134 ATA_DFLAG_DETACH = (1 << 16), 135 ATA_DFLAG_DETACH = (1 << 16),
135 ATA_DFLAG_DETACHED = (1 << 17), 136 ATA_DFLAG_DETACHED = (1 << 17),
@@ -410,10 +411,11 @@ struct ata_ering {
410 411
411struct ata_device { 412struct ata_device {
412 struct ata_port *ap; 413 struct ata_port *ap;
413 u64 n_sectors; /* size of device, if ATA */ 414 unsigned int devno; /* 0 or 1 */
414 unsigned long flags; /* ATA_DFLAG_xxx */ 415 unsigned long flags; /* ATA_DFLAG_xxx */
416 /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
417 u64 n_sectors; /* size of device, if ATA */
415 unsigned int class; /* ATA_DEV_xxx */ 418 unsigned int class; /* ATA_DEV_xxx */
416 unsigned int devno; /* 0 or 1 */
417 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */ 419 u16 id[ATA_ID_WORDS]; /* IDENTIFY xxx DEVICE data */
418 u8 pio_mode; 420 u8 pio_mode;
419 u8 dma_mode; 421 u8 dma_mode;
@@ -439,6 +441,11 @@ struct ata_device {
439 struct ata_ering ering; 441 struct ata_ering ering;
440}; 442};
441 443
444/* Offset into struct ata_device. Fields above it are maintained
445 * acress device init. Fields below are zeroed.
446 */
447#define ATA_DEVICE_CLEAR_OFFSET offsetof(struct ata_device, n_sectors)
448
442struct ata_eh_info { 449struct ata_eh_info {
443 struct ata_device *dev; /* offending device */ 450 struct ata_device *dev; /* offending device */
444 u32 serror; /* SError from LLDD */ 451 u32 serror; /* SError from LLDD */