linux-kernel - [PATCH 5.1 04/30] staging: wilc1000: Avoid GFP

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Message-Id: <20190509181251.512793363@linuxfoundation.org>
Date:   Thu,  9 May 2019 20:42:36 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
        Ajay Singh <ajay.kathat@...rochip.com>,
        Adham Abozaeid <adham.abozaeid@...rochip.com>
Subject: [PATCH 5.1 04/30] staging: wilc1000: Avoid GFP_KERNEL allocation from atomic context.

From: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>

commit ae26aa844679cdf660e12c7055f958cb90889eb6 upstream.

Since wilc_set_multicast_list() is called with dev->addr_list_lock
spinlock held, we can't use GFP_KERNEL memory allocation.

Signed-off-by: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
Fixes: e624c58cf8eb ("staging: wilc1000: refactor code to avoid use of wilc_set_multicast_list global")
Cc: Ajay Singh <ajay.kathat@...rochip.com>
Reviewed-by: Adham Abozaeid <adham.abozaeid@...rochip.com>
Cc: stable <stable@...r.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/staging/wilc1000/wilc_netdev.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/staging/wilc1000/wilc_netdev.c
+++ b/drivers/staging/wilc1000/wilc_netdev.c
@@ -708,7 +708,7 @@ static void wilc_set_multicast_list(stru
 		return;
 	}
 
-	mc_list = kmalloc_array(dev->mc.count, ETH_ALEN, GFP_KERNEL);
+	mc_list = kmalloc_array(dev->mc.count, ETH_ALEN, GFP_ATOMIC);
 	if (!mc_list)
 		return;