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authorHeiko Carstens <heiko.carstens@de.ibm.com>2010-01-13 20:44:40 +0100
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>2010-01-13 20:44:46 +0100
commitf8b068593db4a4184c8963fcd5a7f34584fde8ad (patch)
tree59d28afa0aaa454e4d6a2634226da02cb255e46b
parentd381589834aa69f51f95b1e364fe79688692aab4 (diff)
[S390] dasd: add proper compat pointer conversion for symmetrix ioctl
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
-rw-r--r--drivers/s390/block/dasd_eckd.c14
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index 5819dc02a14..1c500c46222 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -23,6 +23,7 @@
#include <asm/debug.h>
#include <asm/idals.h>
#include <asm/ebcdic.h>
+#include <asm/compat.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <asm/cio.h>
@@ -2844,13 +2845,16 @@ static int dasd_symm_io(struct dasd_device *device, void __user *argp)
rc = -EFAULT;
if (copy_from_user(&usrparm, argp, sizeof(usrparm)))
goto out;
-#ifndef CONFIG_64BIT
- /* Make sure pointers are sane even on 31 bit. */
- if ((usrparm.psf_data >> 32) != 0 || (usrparm.rssd_result >> 32) != 0) {
+ if (is_compat_task() || sizeof(long) == 4) {
+ /* Make sure pointers are sane even on 31 bit. */
rc = -EINVAL;
- goto out;
+ if ((usrparm.psf_data >> 32) != 0)
+ goto out;
+ if ((usrparm.rssd_result >> 32) != 0)
+ goto out;
+ usrparm.psf_data &= 0x7fffffffULL;
+ usrparm.rssd_result &= 0x7fffffffULL;
}
-#endif
/* alloc I/O data area */
psf_data = kzalloc(usrparm.psf_data_len, GFP_KERNEL | GFP_DMA);
rssd_result = kzalloc(usrparm.rssd_result_len, GFP_KERNEL | GFP_DMA);