X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fs390%2Fblock%2Fdasd.c;h=bfeca57098fa6725edd53546e1466f78e6aceed9;hb=93ab471889c6662b42ce7da257f31f24c08d7d9e;hp=e71929db8b0642b5fcd1fa347dfff3898f64df21;hpb=d6454706c382ab74e2ecad7803c434cc6bd30343;p=linux-2.6-omap-h63xx.git

diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index e71929db8b0..bfeca57098f 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -2174,6 +2174,53 @@ dasd_generic_notify(struct ccw_device *cdev, int event)
 	return ret;
 }
 
+static struct dasd_ccw_req *dasd_generic_build_rdc(struct dasd_device *device,
+						   void *rdc_buffer,
+						   int rdc_buffer_size,
+						   char *magic)
+{
+	struct dasd_ccw_req *cqr;
+	struct ccw1 *ccw;
+
+	cqr = dasd_smalloc_request(magic, 1 /* RDC */, rdc_buffer_size, device);
+
+	if (IS_ERR(cqr)) {
+		DEV_MESSAGE(KERN_WARNING, device, "%s",
+			    "Could not allocate RDC request");
+		return cqr;
+	}
+
+	ccw = cqr->cpaddr;
+	ccw->cmd_code = CCW_CMD_RDC;
+	ccw->cda = (__u32)(addr_t)rdc_buffer;
+	ccw->count = rdc_buffer_size;
+
+	cqr->device = device;
+	cqr->expires = 10*HZ;
+	clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
+	cqr->retries = 2;
+	cqr->buildclk = get_clock();
+	cqr->status = DASD_CQR_FILLED;
+	return cqr;
+}
+
+
+int dasd_generic_read_dev_chars(struct dasd_device *device, char *magic,
+				void **rdc_buffer, int rdc_buffer_size)
+{
+	int ret;
+	struct dasd_ccw_req *cqr;
+
+	cqr = dasd_generic_build_rdc(device, *rdc_buffer, rdc_buffer_size,
+				     magic);
+	if (IS_ERR(cqr))
+		return PTR_ERR(cqr);
+
+	ret = dasd_sleep_on(cqr);
+	dasd_sfree_request(cqr, cqr->device);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(dasd_generic_read_dev_chars);
 
 static int __init
 dasd_init(void)