[PATCH 4.19 076/264] staging: rtl8192u: Do not use GFP_KERNEL in atomic context

[Greg Kroah-Hartman]

From: Christophe JAILLET <christophe.jail...@wanadoo.fr>

[ Upstream commit acac75bb451fd39344eb54fad6602dfc9482e970 ]

'rtl8192_irq_rx_tasklet()' is a tasklet initialized in
'rtl8192_init_priv_task()'.
>From this function it is possible to allocate some memory with the
GFP_KERNEL flag, which is not allowed in the atomic context of a tasklet.

Use GFP_ATOMIC instead.

The call chain is:
  rtl8192_irq_rx_tasklet            (in r8192U_core.c)
    --> rtl8192_rx_nomal            (in r8192U_core.c)
      --> ieee80211_rx              (in ieee80211/ieee80211_rx.c)
        --> RxReorderIndicatePacket (in ieee80211/ieee80211_rx.c)

Fixes: 79a5ccd97209 ("staging: rtl8192u: fix large frame size compiler warning")
Signed-off-by: Christophe JAILLET <christophe.jail...@wanadoo.fr>
Link: 
https://lore.kernel.org/r/20200813173458.758284-1-christophe.jail...@wanadoo.fr
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 drivers/staging/rtl8192u/ieee80211/ieee80211_rx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211_rx.c 
b/drivers/staging/rtl8192u/ieee80211/ieee80211_rx.c
index 28cae82d795c7..fb824c5174497 100644
--- a/drivers/staging/rtl8192u/ieee80211/ieee80211_rx.c
+++ b/drivers/staging/rtl8192u/ieee80211/ieee80211_rx.c
@@ -599,7 +599,7 @@ static void RxReorderIndicatePacket(struct ieee80211_device 
*ieee,
 
        prxbIndicateArray = kmalloc_array(REORDER_WIN_SIZE,
                                          sizeof(struct ieee80211_rxb *),
-                                         GFP_KERNEL);
+                                         GFP_ATOMIC);
        if (!prxbIndicateArray)
                return;
 
-- 
2.25.1