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-   -   scsi_dh_rdac: Adding the match function for rdac device handler (http://www.linux-archive.org/device-mapper-development/605230-scsi_dh_rdac-adding-match-function-rdac-device-handler.html)

"Moger, Babu" 12-01-2011 07:01 PM

scsi_dh_rdac: Adding the match function for rdac device handler
 
This patch introduces the match function for rdac device handler. Without this,
sometimes handler attach fails during the device_add. Included check for TPGS
bit before proceeding further. The match function was introduced by this patch
http://www.spinics.net/lists/linux-scsi/msg54284.html

Signed-off-by: Babu Moger <babu.moger@netapp.com>
Acked-by: Hannes Reinecke <hare@suse.de>
---
--- linux-3.2-rc2/drivers/scsi/device_handler/scsi_dh_rdac.c.orig 2011-11-15 11:02:59.000000000 -0600
+++ linux-3.2-rc2/drivers/scsi/device_handler/scsi_dh_rdac.c 2011-11-19 10:47:03.000000000 -0600
@@ -820,6 +820,24 @@ static const struct scsi_dh_devlist rdac
{NULL, NULL},
};

+static bool rdac_match(struct scsi_device *sdev)
+{
+ int i;
+
+ if (scsi_device_tpgs(sdev))
+ return false;
+
+ for (i = 0; rdac_dev_list[i].vendor; i++) {
+ if (!strncmp(sdev->vendor, rdac_dev_list[i].vendor,
+ strlen(rdac_dev_list[i].vendor)) &&
+ !strncmp(sdev->model, rdac_dev_list[i].model,
+ strlen(rdac_dev_list[i].model))) {
+ return true;
+ }
+ }
+ return false;
+}
+
static int rdac_bus_attach(struct scsi_device *sdev);
static void rdac_bus_detach(struct scsi_device *sdev);

@@ -832,6 +850,7 @@ static struct scsi_device_handler rdac_d
.attach = rdac_bus_attach,
.detach = rdac_bus_detach,
.activate = rdac_activate,
+ .match = rdac_match,
};

static int rdac_bus_attach(struct scsi_device *sdev)



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