From: "Michael J. Ruhl" <michael.j.ruhl@intel.com>
Date: Tue, 26 Sep 2017 07:04:22 -0700
Subject: IB/hfi1: Refactor hfi_user_exp_rcv_clear() IOCTLs
Patch-mainline: v4.15-rc1
Git-commit: 3920eef7a7e0cd90364944e6b3b9be3f9e73e4cc
References: bsc#1096793 FATE#325050
The IOCTL is a bit unwieldy. Refactor to a common pattern.
Refactor the _TID_FREE IOCTL.
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/infiniband/hw/hfi1/file_ops.c | 49 +++++++++++++++++++++++++---------
1 file changed, 37 insertions(+), 12 deletions(-)
--- a/drivers/infiniband/hw/hfi1/file_ops.c
+++ b/drivers/infiniband/hw/hfi1/file_ops.c
@@ -88,6 +88,8 @@ static int get_ctxt_info(struct hfi1_fil
static int get_base_info(struct hfi1_filedata *fd, unsigned long arg, u32 len);
static int user_exp_rcv_setup(struct hfi1_filedata *fd, unsigned long arg,
u32 len);
+static int user_exp_rcv_clear(struct hfi1_filedata *fd, unsigned long arg,
+ u32 len);
static int setup_base_ctxt(struct hfi1_filedata *fd,
struct hfi1_ctxtdata *uctxt);
static int setup_subctxt(struct hfi1_ctxtdata *uctxt);
@@ -257,18 +259,7 @@ static long hfi1_file_ioctl(struct file
break;
case HFI1_IOCTL_TID_FREE:
- if (copy_from_user(&tinfo,
- (struct hfi11_tid_info __user *)arg,
- sizeof(tinfo)))
- return -EFAULT;
-
- ret = hfi1_user_exp_rcv_clear(fd, &tinfo);
- if (ret)
- break;
- addr = arg + offsetof(struct hfi1_tid_info, tidcnt);
- if (copy_to_user((void __user *)addr, &tinfo.tidcnt,
- sizeof(tinfo.tidcnt)))
- ret = -EFAULT;
+ ret = user_exp_rcv_clear(fd, arg, _IOC_SIZE(cmd));
break;
case HFI1_IOCTL_TID_INVAL_READ:
@@ -1442,6 +1433,40 @@ static int user_exp_rcv_setup(struct hfi
}
return ret;
+}
+
+/**
+ * user_exp_rcv_clear - Clear the given tid rcv list
+ * @fd: file data of the current driver instance
+ * @arg: ioctl argumnent for user space information
+ * @len: length of data structure associated with ioctl command
+ *
+ * The hfi1_user_exp_rcv_clear() can be called from the error path. Because
+ * of this, we need to use this wrapper to copy the user space information
+ * before doing the clear.
+ */
+static int user_exp_rcv_clear(struct hfi1_filedata *fd, unsigned long arg,
+ u32 len)
+{
+ int ret;
+ unsigned long addr;
+ struct hfi1_tid_info tinfo;
+
+ if (sizeof(tinfo) != len)
+ return -EINVAL;
+
+ if (copy_from_user(&tinfo, (void __user *)arg, (sizeof(tinfo))))
+ return -EFAULT;
+
+ ret = hfi1_user_exp_rcv_clear(fd, &tinfo);
+ if (!ret) {
+ addr = arg + offsetof(struct hfi1_tid_info, tidcnt);
+ if (copy_to_user((void __user *)addr, &tinfo.tidcnt,
+ sizeof(tinfo.tidcnt)))
+ return -EFAULT;
+ }
+
+ return ret;
}
static unsigned int poll_urgent(struct file *fp,