RDMA/bnxt_re: improve clarity in ALLOC_PAGE handler

Update uverbs_copy_to call to use sizeof(dpi) instead of sizeof(length)
when copying the device page index (DPI) back to user space. Both dpi
and length are declared as u32, so this change has no functional impact
but makes the code clearer.

Link: https://patch.msgid.link/r/[email protected]
Signed-off-by: Alok Tiwari <[email protected]>
Reviewed-by: Kalesh AP <[email protected]>
Signed-off-by: Jason Gunthorpe <[email protected]>

Author: aloktiwa

drivers/infiniband/hw/bnxt_re/ib_verbs.c

@@ -4750,7 +4750,7 @@ static int UVERBS_HANDLER(BNXT_RE_METHOD_ALLOC_PAGE)(struct uverbs_attr_bundle *
 		return err;
 
 	err = uverbs_copy_to(attrs, BNXT_RE_ALLOC_PAGE_DPI,
-			     &dpi, sizeof(length));
+			     &dpi, sizeof(dpi));
 	if (err)
 		return err;