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serial: core: Fix serial_base_match() after fixing controller port name

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While fixing DEVNAME to be more usable, I broke serial_base_match() as the
ctrl and port prefix for device names seemed unnecessary.

The prefixes are still needed by serial_base_match() to probe the serial
base controller port, and serial tx is now broken.

Let's fix the issue by checking against dev->type and drv->name instead
of the prefixes that are no longer in the DEVNAME.

Fixes: 1ef2c2df11 ("serial: core: Fix serial core controller port name to show controller id")
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202308021529.35b3ad6c-oliver.sang@intel.com
Signed-off-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Jiri Slaby <jirislaby@kernel.org>
Link: https://lore.kernel.org/r/20230803071034.25571-1-tony@atomide.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tony Lindgren 2023-08-03 10:10:32 +03:00 committed by Greg Kroah-Hartman
parent 1ef2c2df11
commit 7d695d8376
1 changed files with 8 additions and 2 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

10
drivers/tty/serial/serial_base_bus.c
View file

@ -29,9 +29,15 @@ static const struct device_type serial_port_type = {
static int serial_base_match(struct device *dev, struct device_driver *drv)
{
int len = strlen(drv->name);
if (dev->type == &serial_ctrl_type &&
str_has_prefix(drv->name, serial_ctrl_type.name))
return 1;
return !strncmp(dev_name(dev), drv->name, len);
if (dev->type == &serial_port_type &&
str_has_prefix(drv->name, serial_port_type.name))
return 1;
return 0;
}
static struct bus_type serial_base_bus_type = {