diff options
| author | Christopher Bostic <cbostic@linux.vnet.ibm.com> | 2017-03-03 00:15:37 +0300 |
|---|---|---|
| committer | Joel Stanley <joel@jms.id.au> | 2017-03-03 10:48:29 +0300 |
| commit | 7c4d3dec7fdd67e3e77fd279ab7fdc5cde4ba93b (patch) | |
| tree | c2fff0ab21eeb09a1470991e52fd394035ca6f25 | |
| parent | fda8c8c15fdd111fab338a1f85c7e3f52cfbd412 (diff) | |
| download | linux-7c4d3dec7fdd67e3e77fd279ab7fdc5cde4ba93b.tar.xz | |
drivers/fsi: Don't scan after fsi-gpio_master unbound
Check pointers prior to scanning master in the sysfs scan
file. These get invalidated after an unbind operation.
Signed-off-by: Christopher Bostic <cbostic@linux.vnet.ibm.com>
Signed-off-by: Joel Stanley <joel@jms.id.au>
| -rw-r--r-- | drivers/fsi/fsi-master-gpio.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/fsi/fsi-master-gpio.c b/drivers/fsi/fsi-master-gpio.c index c5f4f9c083f1..49f3399f4b2e 100644 --- a/drivers/fsi/fsi-master-gpio.c +++ b/drivers/fsi/fsi-master-gpio.c @@ -476,7 +476,14 @@ static ssize_t store_scan(struct device *dev, const char *buf, size_t count) { - struct fsi_master_gpio *master = dev_get_drvdata(dev); + struct fsi_master_gpio *master; + + if (!dev) + return -EINVAL; + + master = dev_get_drvdata(dev); + if (!master) + return -EINVAL; fsi_master_gpio_init(master); |