Hi Alan,
Quoting Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>:
On Mon, 3 Apr 2017, Gustavo A. R. Silva wrote:
Code refactoring to make the flow easier to follow.
Cc: Alan Stern <stern@xxxxxxxxxxxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Gustavo A. R. Silva <garsilva@xxxxxxxxxxxxxx>
---
drivers/usb/misc/usbtest.c | 67
+++++++++++++++++++++-------------------------
1 file changed, 30 insertions(+), 37 deletions(-)
diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c
index 7bfb6b78..382491e 100644
--- a/drivers/usb/misc/usbtest.c
+++ b/drivers/usb/misc/usbtest.c
@@ -124,18 +124,32 @@ static struct usb_device
*testdev_to_usbdev(struct usbtest_dev *test)
/*-------------------------------------------------------------------------*/
+static inline void endpoint_update(int edi,
+ struct usb_host_endpoint **in,
+ struct usb_host_endpoint **out,
+ struct usb_host_endpoint *e)
+{
+ if (edi) {
+ if (!*in)
+ *in = e;
+ } else {
+ if (!*out)
+ *out = e;
+ }
+}
+
static int
get_endpoints(struct usbtest_dev *dev, struct usb_interface *intf)
{
- int tmp;
- struct usb_host_interface *alt;
- struct usb_host_endpoint *in, *out;
- struct usb_host_endpoint *iso_in, *iso_out;
- struct usb_host_endpoint *int_in, *int_out;
- struct usb_device *udev;
+ int tmp;
+ struct usb_host_interface *alt;
+ struct usb_host_endpoint *in, *out;
+ struct usb_host_endpoint *iso_in, *iso_out;
+ struct usb_host_endpoint *int_in, *int_out;
+ struct usb_device *udev;
What's the difference between these 6 lines you added and the 6 lines
that were there originally?
Yeah, well, certainly none at all. This is what happened: I created a
local copy of my changes(this piece of code included) and fixed some
issues in a previous patch, then I did a git revert and moved my
changes back to the original file. During this process the tabs were
replaced with spaces in the original file, then I had to add the tabs
again and this was the resulting patch.
for (tmp = 0; tmp < intf->num_altsetting; tmp++) {
- unsigned ep;
+ unsigned ep;
And here?
Same as above.
in = out = NULL;
iso_in = iso_out = NULL;
@@ -150,48 +164,27 @@ get_endpoints(struct usbtest_dev *dev, struct
usb_interface *intf)
* ignore other endpoints and altsettings.
*/
for (ep = 0; ep < alt->desc.bNumEndpoints; ep++) {
- struct usb_host_endpoint *e;
+ struct usb_host_endpoint *e;
And here?
Same as above.
+ int edi;
e = alt->endpoint + ep;
+ edi = usb_endpoint_dir_in(&e->desc);
+
switch (usb_endpoint_type(&e->desc)) {
case USB_ENDPOINT_XFER_BULK:
- break;
+ endpoint_update(edi, &in, &out, e);
+ continue;
case USB_ENDPOINT_XFER_INT:
if (dev->info->intr)
- goto try_intr;
+ endpoint_update(edi, &int_in, &int_out, e);
continue;
case USB_ENDPOINT_XFER_ISOC:
if (dev->info->iso)
- goto try_iso;
- /* FALLTHROUGH */
+ endpoint_update(edi, &iso_in, &iso_out, e);
+ /* fall through */
Why change the comment?
Oh, I based this change in the following comment to another patch I
sent some weeks ago:
https://lkml.org/lkml/2017/2/10/293
It is due to Coding Style.
Alan Stern
default:
continue;
}
- if (usb_endpoint_dir_in(&e->desc)) {
- if (!in)
- in = e;
- } else {
- if (!out)
- out = e;
- }
- continue;
-try_intr:
- if (usb_endpoint_dir_in(&e->desc)) {
- if (!int_in)
- int_in = e;
- } else {
- if (!int_out)
- int_out = e;
- }
- continue;
-try_iso:
- if (usb_endpoint_dir_in(&e->desc)) {
- if (!iso_in)
- iso_in = e;
- } else {
- if (!iso_out)
- iso_out = e;
- }
}
if ((in && out) || iso_in || iso_out || int_in || int_out)
goto found;
Thanks for your comments.
--
Gustavo A. R. Silva
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