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Message-Id: <20200713153936.18032-1-johan@kernel.org>
Date: Mon, 13 Jul 2020 17:39:36 +0200
From: Johan Hovold <johan@...nel.org>
To: linux-usb@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
linux-kernel@...r.kernel.org, Johan Hovold <johan@...nel.org>
Subject: [PATCH] USB: serial: sierra: clean up special-interface handling
Clean up the handling of special interfaces that either should be
ignored or that need a larger number of URBs.
Commit 66f092ed3b94 ("USB: serial: sierra: unify quirk handling logic")
replaced the previous is_blacklisted() and is_highmemory() helpers with
a single is_quirk() helper which made it even harder to understand what
the interface lists were used for.
Rename the interface-list struct, its members and the interface-lookup
helper and restructure the code somewhat in order to make it more
self-explanatory.
Signed-off-by: Johan Hovold <johan@...nel.org>
---
drivers/usb/serial/sierra.c | 58 ++++++++++++++++++-------------------
1 file changed, 29 insertions(+), 29 deletions(-)
diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c
index a862aa788a19..57fc3c31712e 100644
--- a/drivers/usb/serial/sierra.c
+++ b/drivers/usb/serial/sierra.c
@@ -45,10 +45,9 @@
static bool nmea;
-/* Used in interface quirks */
-struct sierra_iface_quirk {
- const u32 infolen; /* number of interface numbers on the list */
- const u8 *ifaceinfo; /* pointer to the array holding the numbers */
+struct sierra_iface_list {
+ const u8 *nums; /* array of interface numbers */
+ size_t count; /* number of elements in array */
};
struct sierra_intf_private {
@@ -101,20 +100,19 @@ static int sierra_calc_num_ports(struct usb_serial *serial,
return num_ports;
}
-static int is_quirk(const u8 ifnum, const struct sierra_iface_quirk *quirk)
+static bool is_listed(const u8 ifnum, const struct sierra_iface_list *list)
{
- const u8 *info;
int i;
- if (quirk) {
- info = quirk->ifaceinfo;
+ if (!list)
+ return false;
- for (i = 0; i < quirk->infolen; i++) {
- if (info[i] == ifnum)
- return 1;
- }
+ for (i = 0; i < list->count; i++) {
+ if (list->nums[i] == ifnum)
+ return true;
}
- return 0;
+
+ return false;
}
static u8 sierra_interface_num(struct usb_serial *serial)
@@ -125,6 +123,7 @@ static u8 sierra_interface_num(struct usb_serial *serial)
static int sierra_probe(struct usb_serial *serial,
const struct usb_device_id *id)
{
+ const struct sierra_iface_list *ignore_list;
int result = 0;
struct usb_device *udev;
u8 ifnum;
@@ -143,9 +142,10 @@ static int sierra_probe(struct usb_serial *serial,
usb_set_interface(udev, ifnum, 1);
}
- if (is_quirk(ifnum, (struct sierra_iface_quirk *)id->driver_info)) {
- dev_dbg(&serial->dev->dev,
- "Ignoring interface #%d\n", ifnum);
+ ignore_list = (const struct sierra_iface_list *)id->driver_info;
+
+ if (is_listed(ifnum, ignore_list)) {
+ dev_dbg(&serial->dev->dev, "Ignoring interface #%d\n", ifnum);
return -ENODEV;
}
@@ -154,22 +154,22 @@ static int sierra_probe(struct usb_serial *serial,
/* interfaces with higher memory requirements */
static const u8 hi_memory_typeA_ifaces[] = { 0, 2 };
-static const struct sierra_iface_quirk typeA_interface_list = {
- .infolen = ARRAY_SIZE(hi_memory_typeA_ifaces),
- .ifaceinfo = hi_memory_typeA_ifaces,
+static const struct sierra_iface_list typeA_interface_list = {
+ .nums = hi_memory_typeA_ifaces,
+ .count = ARRAY_SIZE(hi_memory_typeA_ifaces),
};
static const u8 hi_memory_typeB_ifaces[] = { 3, 4, 5, 6 };
-static const struct sierra_iface_quirk typeB_interface_list = {
- .infolen = ARRAY_SIZE(hi_memory_typeB_ifaces),
- .ifaceinfo = hi_memory_typeB_ifaces,
+static const struct sierra_iface_list typeB_interface_list = {
+ .nums = hi_memory_typeB_ifaces,
+ .count = ARRAY_SIZE(hi_memory_typeB_ifaces),
};
/* 'ignorelist' of interfaces not served by this driver */
static const u8 direct_ip_non_serial_ifaces[] = { 7, 8, 9, 10, 11, 19, 20 };
-static const struct sierra_iface_quirk direct_ip_interface_ignore = {
- .infolen = ARRAY_SIZE(direct_ip_non_serial_ifaces),
- .ifaceinfo = direct_ip_non_serial_ifaces,
+static const struct sierra_iface_list direct_ip_interface_ignore = {
+ .nums = direct_ip_non_serial_ifaces,
+ .count = ARRAY_SIZE(direct_ip_non_serial_ifaces),
};
static const struct usb_device_id id_table[] = {
@@ -859,7 +859,7 @@ static int sierra_port_probe(struct usb_serial_port *port)
{
struct usb_serial *serial = port->serial;
struct sierra_port_private *portdata;
- const struct sierra_iface_quirk *himemoryp;
+ const struct sierra_iface_list *himemory_list;
u8 ifnum;
portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
@@ -878,16 +878,16 @@ static int sierra_port_probe(struct usb_serial_port *port)
if (serial->num_ports == 1) {
/* Get interface number for composite device */
ifnum = sierra_interface_num(serial);
- himemoryp = &typeB_interface_list;
+ himemory_list = &typeB_interface_list;
} else {
/* This is really the usb-serial port number of the interface
* rather than the interface number.
*/
ifnum = port->port_number;
- himemoryp = &typeA_interface_list;
+ himemory_list = &typeA_interface_list;
}
- if (is_quirk(ifnum, himemoryp)) {
+ if (is_listed(ifnum, himemory_list)) {
portdata->num_out_urbs = N_OUT_URB_HM;
portdata->num_in_urbs = N_IN_URB_HM;
}
--
2.26.2
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