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IB/hfi1: Refactor get_base_info

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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>
This commit is contained in:
Michael J. Ruhl 2017-09-26 07:04:10 -07:00 committed by Doug Ledford
parent 033c16d71f
commit 45afb32453
1 changed files with 12 additions and 12 deletions
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24
drivers/infiniband/hw/hfi1/file_ops.c
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@ -85,8 +85,7 @@ 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, unsigned long arg, u32 len);
static int get_base_info(struct hfi1_filedata *fd, void __user *ubase,
__u32 len);
static int get_base_info(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);
@ -243,9 +242,9 @@ static long hfi1_file_ioctl(struct file *fp, unsigned int cmd,
break;
case HFI1_IOCTL_USER_INFO:
ret = get_base_info(fd, (void __user *)(unsigned long)arg,
sizeof(struct hfi1_base_info));
ret = get_base_info(fd, arg, _IOC_SIZE(cmd));
break;
case HFI1_IOCTL_CREDIT_UPD:
if (uctxt)
sc_return_credits(uctxt->sc);
@ -1341,18 +1340,18 @@ static int setup_base_ctxt(struct hfi1_filedata *fd,
return ret;
}
static int get_base_info(struct hfi1_filedata *fd, void __user *ubase,
__u32 len)
static int get_base_info(struct hfi1_filedata *fd, unsigned long arg, u32 len)
{
struct hfi1_base_info binfo;
struct hfi1_ctxtdata *uctxt = fd->uctxt;
struct hfi1_devdata *dd = uctxt->dd;
ssize_t sz;
unsigned offset;
int ret = 0;
trace_hfi1_uctxtdata(uctxt->dd, uctxt, fd->subctxt);
if (sizeof(binfo) != len)
return -EINVAL;
memset(&binfo, 0, sizeof(binfo));
binfo.hw_version = dd->revision;
binfo.sw_version = HFI1_KERN_SWVERSION;
@ -1411,10 +1410,11 @@ static int get_base_info(struct hfi1_filedata *fd, void __user *ubase,
uctxt->ctxt,
fd->subctxt, 0);
}
sz = (len < sizeof(binfo)) ? len : sizeof(binfo);
if (copy_to_user(ubase, &binfo, sz))
ret = -EFAULT;
return ret;
if (copy_to_user((void __user *)arg, &binfo, len))
return -EFAULT;
return 0;
}
static unsigned int poll_urgent(struct file *fp,