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| author |   Michael J. Ruhl <michael.j.ruhl@intel.com> | 2017-09-26 07:03:57 -0700 |
|---|---|---|
| committer |   Doug Ledford <dledford@redhat.com> | 2017-09-29 11:08:05 -0400 |
| commit | ff1a5582c9516b324394fbaaf24772d1b6bd9c15 (patch) | |
| tree | c8c7bce6cfe4ec0cb92ebe630a494291f90eaa7d /drivers/infiniband/hw/hfi1/file_ops.c | |
| parent | IB/hfi1: Refactor assign_ctxt() IOCTL (diff) | |
| download | linux-dev-ff1a5582c9516b324394fbaaf24772d1b6bd9c15.tar.xz linux-dev-ff1a5582c9516b324394fbaaf24772d1b6bd9c15.zip | |
IB/hfi1: Refactor get_ctxt_info
The IOCTL is a bit unwieldy. Refactor to a common pattern.
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>
Diffstat (limited to '')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/file_ops.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/drivers/infiniband/hw/hfi1/file_ops.c b/drivers/infiniband/hw/hfi1/file_ops.c index 41f9cf98c81a..2c373fc885b2 100644 --- a/drivers/infiniband/hw/hfi1/file_ops.c +++ b/drivers/infiniband/hw/hfi1/file_ops.c @@ -84,8 +84,7 @@ static void init_subctxts(struct hfi1_ctxtdata *uctxt, static int init_user_ctxt(struct hfi1_filedata *fd, struct hfi1_ctxtdata *uctxt); static void user_init(struct hfi1_ctxtdata *uctxt); -static int get_ctxt_info(struct hfi1_filedata *fd, void __user *ubase, - __u32 len); +static int get_ctxt_info(struct hfi1_filedata *fd, unsigned long arg, u32 len); static int get_base_info(struct hfi1_filedata *fd, void __user *ubase, __u32 len); static int setup_base_ctxt(struct hfi1_filedata *fd, @@ -240,9 +239,9 @@ static long hfi1_file_ioctl(struct file *fp, unsigned int cmd, break; case HFI1_IOCTL_CTXT_INFO: - ret = get_ctxt_info(fd, (void __user *)(unsigned long)arg, - sizeof(struct hfi1_ctxt_info)); + ret = get_ctxt_info(fd, arg, _IOC_SIZE(cmd)); break; + case HFI1_IOCTL_USER_INFO: ret = get_base_info(fd, (void __user *)(unsigned long)arg, sizeof(struct hfi1_base_info)); @@ -1237,12 +1236,13 @@ static void user_init(struct hfi1_ctxtdata *uctxt) hfi1_rcvctrl(uctxt->dd, rcvctrl_ops, uctxt); } -static int get_ctxt_info(struct hfi1_filedata *fd, void __user *ubase, - __u32 len) +static int get_ctxt_info(struct hfi1_filedata *fd, unsigned long arg, u32 len) { struct hfi1_ctxt_info cinfo; struct hfi1_ctxtdata *uctxt = fd->uctxt; - int ret = 0; + + if (sizeof(cinfo) != len) + return -EINVAL; memset(&cinfo, 0, sizeof(cinfo)); cinfo.runtime_flags = (((uctxt->flags >> HFI1_CAP_MISC_SHIFT) & @@ -1272,10 +1272,10 @@ static int get_ctxt_info(struct hfi1_filedata *fd, void __user *ubase, cinfo.rcvegr_size = uctxt->egrbufs.rcvtid_size; trace_hfi1_ctxt_info(uctxt->dd, uctxt->ctxt, fd->subctxt, cinfo); - if (copy_to_user(ubase, &cinfo, sizeof(cinfo))) - ret = -EFAULT; + if (copy_to_user((void __user *)arg, &cinfo, len)) + return -EFAULT; - return ret; + return 0; } static int init_user_ctxt(struct hfi1_filedata *fd, |