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[libata] sata_mv: more S/G fixes

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* corruption fix: we only want the lower 16 bits of length (0 == 64kb)

* ditto: the upper layer sets max-phys-segments to LIBATA_MAX_PRD,
  so we must reset it to own hw-specific length.

* delete unused mv_fill_sg() return value

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Jeff Garzik 2007-10-12 00:16:23 -04:00
parent bbf25010f1
commit 6c08772e49
1 changed files with 18 additions and 9 deletions
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27
drivers/ata/sata_mv.c
View file

@ -69,10 +69,11 @@
#include <linux/device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <linux/libata.h>
#define DRV_NAME "sata_mv"
#define DRV_VERSION "1.0"
#define DRV_VERSION "1.01"
enum {
/* BAR's are enumerated in terms of pci_resource_start() terms */
@ -420,6 +421,7 @@ static void mv_error_handler(struct ata_port *ap);
static void mv_post_int_cmd(struct ata_queued_cmd *qc);
static void mv_eh_freeze(struct ata_port *ap);
static void mv_eh_thaw(struct ata_port *ap);
static int mv_slave_config(struct scsi_device *sdev);
static int mv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
static void mv5_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio,
@ -457,7 +459,7 @@ static struct scsi_host_template mv5_sht = {
.use_clustering = 1,
.proc_name = DRV_NAME,
.dma_boundary = MV_DMA_BOUNDARY,
.slave_configure = ata_scsi_slave_config,
.slave_configure = mv_slave_config,
.slave_destroy = ata_scsi_slave_destroy,
.bios_param = ata_std_bios_param,
};
@ -475,7 +477,7 @@ static struct scsi_host_template mv6_sht = {
.use_clustering = 1,
.proc_name = DRV_NAME,
.dma_boundary = MV_DMA_BOUNDARY,
.slave_configure = ata_scsi_slave_config,
.slave_configure = mv_slave_config,
.slave_destroy = ata_scsi_slave_destroy,
.bios_param = ata_std_bios_param,
};
@ -763,6 +765,17 @@ static void mv_irq_clear(struct ata_port *ap)
{
}
static int mv_slave_config(struct scsi_device *sdev)
{
int rc = ata_scsi_slave_config(sdev);
if (rc)
return rc;
blk_queue_max_phys_segments(sdev->request_queue, MV_MAX_SG_CT / 2);
return 0; /* scsi layer doesn't check return value, sigh */
}
static void mv_set_edma_ptrs(void __iomem *port_mmio,
struct mv_host_priv *hpriv,
struct mv_port_priv *pp)
@ -1130,10 +1143,9 @@ static void mv_port_stop(struct ata_port *ap)
* LOCKING:
* Inherited from caller.
*/
static unsigned int mv_fill_sg(struct ata_queued_cmd *qc)
static void mv_fill_sg(struct ata_queued_cmd *qc)
{
struct mv_port_priv *pp = qc->ap->private_data;
unsigned int n_sg = 0;
struct scatterlist *sg;
struct mv_sg *mv_sg;
@ -1151,7 +1163,7 @@ static unsigned int mv_fill_sg(struct ata_queued_cmd *qc)
mv_sg->addr = cpu_to_le32(addr & 0xffffffff);
mv_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16);
mv_sg->flags_size = cpu_to_le32(len);
mv_sg->flags_size = cpu_to_le32(len & 0xffff);
sg_len -= len;
addr += len;
@ -1160,12 +1172,9 @@ static unsigned int mv_fill_sg(struct ata_queued_cmd *qc)
mv_sg->flags_size |= cpu_to_le32(EPRD_FLAG_END_OF_TBL);
mv_sg++;
n_sg++;
}
}
return n_sg;
}
static inline void mv_crqb_pack_cmd(__le16 *cmdw, u8 data, u8 addr, unsigned last)