scsi_transport_spi: Export host width and HBA id
PATCH RESEND v2 1/1 scsi_transport_spi: Export host width and HBA id
This is a slightly updated version of the patch which Hannes had posted earlier. This changes the host attr name from "width" to "host_width", as there already exists an attribute named "width".
---
Currently it's impossible to find out if the host supports wide SCSI unless you're committed to trawl through syslog. And it's near impossible to find the actual HBA id, which is settable for some SCSI HBAs (like aic7xxx).
So export them via sysfs.
Signed-off-by Hannes Reinecke <[email protected]>
Signed-off-by Ankit Jain <[email protected]>
--- drivers/scsi/scsi_transport_spi.c | 24 ++++++++++++++++++++++++ 1 files changed, 24 insertions(+), 0 deletions(-)
drivers/scsi/scsi_transport_spi.c +24 -0
@@ -597,6 +597,28 @@ static DEVICE_ATTR(signalling, S_IRUGO, show_spi_host_signalling, store_spi_host_signalling); +static ssize_t show_spi_host_width (struct device *cdev, +struct device_attribute *attr, +char *buf) +{ +struct Scsi_Host *shost =transport_class_to_shost (cdev); + +return sprintf (buf,"%s\n" , shost->max_id ==16 ?"wide" :"narrow" ); +} +static DEVICE_ATTR(host_width, S_IRUGO, + show_spi_host_width, NULL); + +static ssize_t show_spi_host_hba_id (struct device *cdev, +struct device_attribute *attr, +char *buf) +{ +struct Scsi_Host *shost =transport_class_to_shost (cdev); + +return sprintf (buf,"%d\n" , shost->this_id); +} +static DEVICE_ATTR(hba_id, S_IRUGO, + show_spi_host_hba_id, NULL); +#define DV_SET (x, y) \ if(i->f->set_##x) \ i->f->set_##x(sdev->sdev_target, y)
@@ -1380,6 +1402,8 @@ static DECLARE_ANON_TRANSPORT_CLASS(spi_device_class,static struct attribute *host_attributes[] = { &dev_attr_signalling.attr, + &dev_attr_host_width.attr, + &dev_attr_hba_id.attr,NULL };
Signature · 2 lines
Ankit Jain SUSE Labs