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| author | Jia-Ju Bai <baijiaju1990@gmail.com> | 2018-04-10 10:31:46 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-04-23 10:57:06 +0200 |
| commit | 13eac05b0581e6f9f5aec93a8ab64c83d7c311bf (patch) | |
| tree | 1d4fc86945ab00c78c598cf7930d30555ca7c53f /drivers/tty | |
| parent | serial/aspeed-vuart: Implement quick throttle mechanism (diff) | |
| download | linux-13eac05b0581e6f9f5aec93a8ab64c83d7c311bf.tar.xz linux-13eac05b0581e6f9f5aec93a8ab64c83d7c311bf.zip | |
tty: ipwireless: Replace GFP_ATOMIC with GFP_KERNEL in ipwireless_network_create
ipwireless_network_create() is never called in atomic context.
The call chain ending up at ipwireless_network_create() is:
[1] ipwireless_network_create() <- config_ipwireless() <-
ipwireless_attach()
ipwireless_attach() is only set as ".probe" in struct pcmcia_driver.
Despite never getting called from atomic context,
ipwireless_network_create() calls kzalloc() with GFP_ATOMIC,
which does not sleep for allocation.
GFP_ATOMIC is not necessary and can be replaced with GFP_KERNEL,
which can sleep and improve the possibility of sucessful allocation.
This is found by a static analysis tool named DCNS written by myself.
And I also manually check it.
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/ipwireless/network.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/tty/ipwireless/network.c b/drivers/tty/ipwireless/network.c index 695439c03147..cf20616340a1 100644 --- a/drivers/tty/ipwireless/network.c +++ b/drivers/tty/ipwireless/network.c @@ -416,7 +416,7 @@ void ipwireless_network_packet_received(struct ipw_network *network, struct ipw_network *ipwireless_network_create(struct ipw_hardware *hw) { struct ipw_network *network = - kzalloc(sizeof(struct ipw_network), GFP_ATOMIC); + kzalloc(sizeof(struct ipw_network), GFP_KERNEL); if (!network) return NULL; |