openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

usb: typec: mux: Fix matching with typec_altmode_desc 

In typec_mux_match() "nval" is assigned the number of elements in the
"svid" fwnode property, then the variable is used to store the success
of the read and finally attempts to loop between 0 and "success" - i.e.
not at all - and the code returns indicating that no match was found.

Fix this by using a separate variable to track the success of the read,
to allow the loop to get a change to find a match.

Fixes: 96a6d031ca ("usb: typec: mux: Find the muxes by also matching against the device node")
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210516034730.621461-1-bjorn.andersson@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Bjorn Andersson 2021-05-15 20:47:30 -07:00 committed by Greg Kroah-Hartman
parent dcb4b8ad6a
commit acf5631c23
1 changed files with 4 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/usb/typec/mux.c
View File

@ -191,6 +191,7 @@ static void *typec_mux_match(struct fwnode_handle *fwnode, const char *id,
bool match;
int nval;
u16 *val;
int ret;
int i;
/*
@ -218,10 +219,10 @@ static void *typec_mux_match(struct fwnode_handle *fwnode, const char *id,
if (!val)
return ERR_PTR(-ENOMEM);
nval = fwnode_property_read_u16_array(fwnode, "svid", val, nval);
if (nval < 0) {
ret = fwnode_property_read_u16_array(fwnode, "svid", val, nval);
if (ret < 0) {
kfree(val);
return ERR_PTR(nval);
return ERR_PTR(ret);
}
for (i = 0; i < nval; i++) {