[SCSI] zfcp: fix module parameter parsing
From: Heiko Carstens <heiko.carstens@de.ibm.com>
Fixes module parameter parsing for "device" parameter. The original
module parameter was changed while parsing it. This corrupted the
output in sysfs (/sys/module/zfcp/parameters/device).
Signed-off-by: Andreas Herrmann <aherrman@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c
index c999042..e17b4d5 100644
--- a/drivers/s390/scsi/zfcp_aux.c
+++ b/drivers/s390/scsi/zfcp_aux.c
@@ -218,13 +218,20 @@
* Parse "device=..." parameter string.
*/
static int __init
-zfcp_device_setup(char *str)
+zfcp_device_setup(char *devstr)
{
- char *tmp;
+ char *tmp, *str;
+ size_t len;
- if (!str)
+ if (!devstr)
return 0;
+ len = strlen(devstr) + 1;
+ str = (char *) kmalloc(len, GFP_KERNEL);
+ if (!str)
+ goto err_out;
+ memcpy(str, devstr, len);
+
tmp = strchr(str, ',');
if (!tmp)
goto err_out;
@@ -241,10 +248,12 @@
zfcp_data.init_fcp_lun = simple_strtoull(tmp, &tmp, 0);
if (*tmp != '\0')
goto err_out;
+ kfree(str);
return 1;
err_out:
ZFCP_LOG_NORMAL("Parse error for device parameter string %s\n", str);
+ kfree(str);
return 0;
}