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[4/7] rtw88: fix shift of more than 32 bits of a integer

Message ID 20190606034255.2192-5-aaron.ma@canonical.com
State Accepted
Headers show
Series Add RTL8822 wifi driver | expand

Commit Message

Aaron Ma June 6, 2019, 3:42 a.m. UTC 
From: Colin Ian King <colin.king@canonical.com>

BugLink: https://bugs.launchpad.net/bugs/1831828

Currently the shift of an integer value more than 32 bits can
occur when nss is more than 32.  Fix this by making the integer
constants unsigned long longs before shifting and bit-wise or'ing
with the u64 ra_mask to avoid the undefined shift behaviour.

Addresses-Coverity: ("Bad shift operation")
Fixes: e3037485c68e ("rtw88: new Realtek 802.11ac driver")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
(cherry picked from commit b85bd9a14c4b2722dc8764acdcce9b503e638760)
Signed-off-by: Aaron Ma <aaron.ma@canonical.com>
---
 drivers/net/wireless/realtek/rtw88/main.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/wireless/realtek/rtw88/main.c b/drivers/net/wireless/realtek/rtw88/main.c
index 9893e5e297e3..6304082361a7 100644
--- a/drivers/net/wireless/realtek/rtw88/main.c
+++ b/drivers/net/wireless/realtek/rtw88/main.c
@@ -363,13 +363,13 @@  static u64 get_vht_ra_mask(struct ieee80211_sta *sta)
 		vht_mcs_cap = mcs_map & 0x3;
 		switch (vht_mcs_cap) {
 		case 2: /* MCS9 */
-			ra_mask |= 0x3ff << nss;
+			ra_mask |= 0x3ffULL << nss;
 			break;
 		case 1: /* MCS8 */
-			ra_mask |= 0x1ff << nss;
+			ra_mask |= 0x1ffULL << nss;
 			break;
 		case 0: /* MCS7 */
-			ra_mask |= 0x0ff << nss;
+			ra_mask |= 0x0ffULL << nss;
 			break;
 		default:
 			break;