lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

libata: stop overloading port_info->private_data

Browse Source 
port_info->private_data is currently used for two purposes - to record
private data about the port_info or to specify host->private_data to
use when allocating ata_host.

This overloading is confusing and counter-intuitive in that
port_info->private_data becomes host->private_data instead of
port->private_data.  In addition, port_info and host don't correspond
to each other 1-to-1.  Currently, the first non-NULL
port_info->private_data is used.

This patch makes port_info->private_data just be what it is -
private_data for the port_info where LLD can jot down extra info.
libata no longer sets host->private_data to the first non-NULL
port_info->private_data, @host_priv argument is added to
ata_pci_init_one() instead.  LLDs which use ata_pci_init_one() can use
this argument to pass in pointer to host private data.  LLDs which
don't should use init-register model anyway and can initialize
host->private_data directly.

Adding @host_priv instead of using init-register model for LLDs which
use ata_pci_init_one() is suggested by Alan Cox.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
This commit is contained in:
Tejun Heo
2008-03-25 12:22:49 +09:00
committed by Jeff Garzik
parent 1bd5b715a3
commit 887125e374
39 changed files with 79 additions and 145 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
include/linux/libata.h
View File

@@ -1020,7 +1020,7 @@ struct pci_dev;
extern int ata_pci_init_one(struct pci_dev *pdev,
const struct ata_port_info * const * ppi,
struct scsi_host_template *sht);
struct scsi_host_template *sht, void *host_priv);
extern void ata_pci_remove_one(struct pci_dev *pdev);
#ifdef CONFIG_PM
extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);