[v2,3/7] hwrng: core: Simplify RNG switching from sysfs

Message ID 1442497557-9271-4-git-send-email-lee.jones@linaro.org
State New
Headers show

Commit Message

Lee Jones Sept. 17, 2015, 1:45 p.m.
If we attempt to use sysfs to change the current RNG in the usual
way i.e. issuing something like:

`echo 8a8a000.rng > /sys/devices/virtual/misc/hw_random/rng_current`

... it will fail because the code doesn't currently take the '\n'
into consideration.  Well, now it does.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/char/hw_random/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Peter Korsgaard Sept. 17, 2015, 2:08 p.m. | #1
>>>>> "Lee" == Lee Jones <lee.jones@linaro.org> writes:

 > If we attempt to use sysfs to change the current RNG in the usual
 > way i.e. issuing something like:

 > `echo 8a8a000.rng > /sys/devices/virtual/misc/hw_random/rng_current`

 > ... it will fail because the code doesn't currently take the '\n'
 > into consideration.  Well, now it does.

 > Signed-off-by: Lee Jones <lee.jones@linaro.org>
 > ---
 >  drivers/char/hw_random/core.c | 2 +-
 >  1 file changed, 1 insertion(+), 1 deletion(-)

 > diff --git a/drivers/char/hw_random/core.c b/drivers/char/hw_random/core.c
 > index da8faf7..2d4a969 100644
 > --- a/drivers/char/hw_random/core.c
 > +++ b/drivers/char/hw_random/core.c
 > @@ -323,7 +323,7 @@ static ssize_t hwrng_attr_current_store(struct device *dev,
 >  		return -ERESTARTSYS;
 >  	err = -ENODEV;
 >  	list_for_each_entry(rng, &rng_list, list) {
 > -		if (strcmp(rng->name, buf) == 0) {
 > +		if (sysfs_streq(rng->name, buf)) {

Looks good.

Acked-by: Peter Korsgaard <peter@korsgaard.com>

Patch

diff --git a/drivers/char/hw_random/core.c b/drivers/char/hw_random/core.c
index da8faf7..2d4a969 100644
--- a/drivers/char/hw_random/core.c
+++ b/drivers/char/hw_random/core.c
@@ -323,7 +323,7 @@  static ssize_t hwrng_attr_current_store(struct device *dev,
 		return -ERESTARTSYS;
 	err = -ENODEV;
 	list_for_each_entry(rng, &rng_list, list) {
-		if (strcmp(rng->name, buf) == 0) {
+		if (sysfs_streq(rng->name, buf)) {
 			err = 0;
 			if (rng != current_rng)
 				err = set_current_rng(rng);