[PATCH] Bluetooth: MGMT: Replace uses of bitmap_from_u64 with bitmap_from_arr32

[Luiz Augusto von Dentz <luiz.dentz@xxxxxxxxx>]

From: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>

bitmap_from_u64 expects at least 8 bytes to be declared since it doesn't
take any parameter regarding the number of bits causing the following
warnings:

In file included from include/linux/cpumask.h:12,
                 from include/linux/mm_types_task.h:14,
                 from include/linux/mm_types.h:5,
                 from include/linux/buildid.h:5,
                 from include/linux/module.h:14,
                 from net/bluetooth/mgmt.c:27:
In function 'bitmap_copy',
    inlined from 'bitmap_copy_clear_tail' at include/linux/bitmap.h:270:2,
    inlined from 'bitmap_from_u64' at include/linux/bitmap.h:622:2,
    inlined from 'set_device_flags' at net/bluetooth/mgmt.c:4534:4:
include/linux/bitmap.h:261:9: warning: 'memcpy' forming offset [4, 7] is
out of the bounds [0, 4] of object 'flags' with type
'long unsigned int[1]' [-Warray-bounds]
  261 |         memcpy(dst, src, len);
      |         ^~~~~~~~~~~~~~~~~~~~~
In file included from include/linux/kasan-checks.h:5,
                 from include/asm-generic/rwonce.h:26,
                 from ./arch/arm/include/generated/asm/rwonce.h:1,
                 from include/linux/compiler.h:248,
                 from include/linux/build_bug.h:5,
                 from include/linux/container_of.h:5,
                 from include/linux/list.h:5,
                 from include/linux/module.h:12,
                 from net/bluetooth/mgmt.c:27:
net/bluetooth/mgmt.c: In function 'set_device_flags':
net/bluetooth/mgmt.c:4532:40: note: 'flags' declared here
 4532 |                         DECLARE_BITMAP(flags, __HCI_CONN_NUM_FLAGS);
      |                                        ^~~~~
include/linux/types.h:11:23: note: in definition of macro 'DECLARE_BITMAP'
   11 |         unsigned long name[BITS_TO_LONGS(bits)]
      |                       ^~~~

In order to fix the above this replaces the uses of bitmap_from_u64 with
bitmap_from_arr32 wich does takes the properly take the number of bits.

Fixes: a9a347655d22 ("Bluetooth: MGMT: Add conditions for setting HCI_CONN_FLAG_REMOTE_WAKEUP")
Reported-By: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>
---
 net/bluetooth/mgmt.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 74937a834648..878be1cac5b7 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -4519,7 +4519,8 @@ static int set_device_flags(struct sock *sk, struct hci_dev *hdev, void *data,
 							      cp->addr.type);
 
 		if (br_params) {
-			bitmap_from_u64(br_params->flags, current_flags);
+			bitmap_from_arr32(br_params->flags, &current_flags,
+					  __HCI_CONN_NUM_FLAGS);
 			status = MGMT_STATUS_SUCCESS;
 		} else {
 			bt_dev_warn(hdev, "No such BR/EDR device %pMR (0x%x)",
@@ -4531,7 +4532,8 @@ static int set_device_flags(struct sock *sk, struct hci_dev *hdev, void *data,
 		if (params) {
 			DECLARE_BITMAP(flags, __HCI_CONN_NUM_FLAGS);
 
-			bitmap_from_u64(flags, current_flags);
+			bitmap_from_arr32(flags, &current_flags,
+					  __HCI_CONN_NUM_FLAGS);
 
 			/* Devices using RPAs can only be programmed in the
 			 * acceptlist LL Privacy has been enable otherwise they
@@ -4546,7 +4548,8 @@ static int set_device_flags(struct sock *sk, struct hci_dev *hdev, void *data,
 				goto unlock;
 			}
 
-			bitmap_from_u64(params->flags, current_flags);
+			bitmap_from_arr32(params->flags, &current_flags,
+					  __HCI_CONN_NUM_FLAGS);
 			status = MGMT_STATUS_SUCCESS;
 
 			/* Update passive scan if HCI_CONN_FLAG_DEVICE_PRIVACY
-- 
2.35.1