isdn: Fix a sleep-in-atomic bug
commit e8f4ae85439f34bec3b0ab69223a41809dab28c9 upstream. The driver may sleep under a spin lock, the function call path is: isdn_ppp_mp_receive (acquire the lock) isdn_ppp_mp_reassembly isdn_ppp_push_higher isdn_ppp_decompress isdn_ppp_ccp_reset_trans isdn_ppp_ccp_reset_alloc_state kzalloc(GFP_KERNEL) --> may sleep To fixed it, the "GFP_KERNEL" is replaced with "GFP_ATOMIC". Signed-off-by: Jia-Ju Bai <baijiaju1990@163.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Amit Pundir <amit.pundir@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -2364,7 +2364,7 @@ static struct ippp_ccp_reset_state *isdn_ppp_ccp_reset_alloc_state(struct ippp_s
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id);
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return NULL;
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} else {
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rs = kzalloc(sizeof(struct ippp_ccp_reset_state), GFP_KERNEL);
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rs = kzalloc(sizeof(struct ippp_ccp_reset_state), GFP_ATOMIC);
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if (!rs)
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return NULL;
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rs->state = CCPResetIdle;
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