linux-stable.git/drivers/usb/misc/usbtest.c, branch linux-6.13.y

drivers/usb/misc: refactor min with min_t

2024-11-13T14:09:51+00:00

Ensure type safety by using min_t() instead of min().

Also add the explicit `unsigned int` as scripts/checkpatch.pl warns about:

	WARNING: Prefer 'unsigned int' to bare use of 'unsigned'

Signed-off-by: Sabyrzhan Tasbolatov 
Link: https://lore.kernel.org/r/20241112155817.3512577-5-snovitoll@gmail.com
Signed-off-by: Greg Kroah-Hartman

usb: usbtest: fix a type promotion bug

2023-10-08T05:50:36+00:00

The "len" here is sometimes negative error codes from
usb_get_descriptor(), so we don't want to type promote them to unsigned
long.

This bug pre-dates the invention of git.

Signed-off-by: Dan Carpenter 
Link: https://lore.kernel.org/r/506f7935-2cba-41d9-ab5d-ddb6ad6320bd@moroto.mountain
Signed-off-by: Greg Kroah-Hartman

usb/misc: fix repeated words in comments

2022-07-27T12:33:57+00:00

 Delete the redundant word 'with'.

Signed-off-by: Jilin Yuan 
Link: https://lore.kernel.org/r/20220716134105.44710-1-yuanjilin@cdjrlc.com
Signed-off-by: Greg Kroah-Hartman

usb: usbtest: reduce stack usage in test_queue

2020-07-21T11:41:57+00:00

Fix the warning: [-Werror=-Wframe-larger-than=]

drivers/usb/misc/usbtest.c: In function 'test_queue':
drivers/usb/misc/usbtest.c:2148:1:
warning: the frame size of 1232 bytes is larger than 1024 bytes

Reported-by: kbuild test robot 
Acked-by: Alan Stern 
Signed-off-by: Bixuan Cui 
Link: https://lore.kernel.org/r/ffa85702-86ab-48d7-4da2-2efcc94b05d3@huawei.com
Signed-off-by: Greg Kroah-Hartman

usb: Use fallthrough pseudo-keyword

2020-07-10T06:55:17+00:00

Replace the existing /* fall through */ comments and its variants with
the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary
fall-through markings when it is the case.

[1] https://www.kernel.org/doc/html/latest/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through

Signed-off-by: Gustavo A. R. Silva 
Link: https://lore.kernel.org/r/20200707195607.GA4198@embeddedor
Signed-off-by: Greg Kroah-Hartman

usb: usbtest: fix missing kfree(dev->buf) in usbtest_disconnect

2020-06-18T08:42:52+00:00

BUG: memory leak
unreferenced object 0xffff888055046e00 (size 256):
  comm "kworker/2:9", pid 2570, jiffies 4294942129 (age 1095.500s)
  hex dump (first 32 bytes):
    00 70 04 55 80 88 ff ff 18 bb 5a 81 ff ff ff ff  .p.U......Z.....
    f5 96 78 81 ff ff ff ff 37 de 8e 81 ff ff ff ff  ..x.....7.......
  backtrace:
    [<00000000d121dccf>] kmemleak_alloc_recursive
include/linux/kmemleak.h:43 [inline]
    [<00000000d121dccf>] slab_post_alloc_hook mm/slab.h:586 [inline]
    [<00000000d121dccf>] slab_alloc_node mm/slub.c:2786 [inline]
    [<00000000d121dccf>] slab_alloc mm/slub.c:2794 [inline]
    [<00000000d121dccf>] kmem_cache_alloc_trace+0x15e/0x2d0 mm/slub.c:2811
    [<000000005c3c3381>] kmalloc include/linux/slab.h:555 [inline]
    [<000000005c3c3381>] usbtest_probe+0x286/0x19d0
drivers/usb/misc/usbtest.c:2790
    [<000000001cec6910>] usb_probe_interface+0x2bd/0x870
drivers/usb/core/driver.c:361
    [<000000007806c118>] really_probe+0x48d/0x8f0 drivers/base/dd.c:551
    [<00000000a3308c3e>] driver_probe_device+0xfc/0x2a0 drivers/base/dd.c:724
    [<000000003ef66004>] __device_attach_driver+0x1b6/0x240
drivers/base/dd.c:831
    [<00000000eee53e97>] bus_for_each_drv+0x14e/0x1e0 drivers/base/bus.c:431
    [<00000000bb0648d0>] __device_attach+0x1f9/0x350 drivers/base/dd.c:897
    [<00000000838b324a>] device_initial_probe+0x1a/0x20 drivers/base/dd.c:944
    [<0000000030d501c1>] bus_probe_device+0x1e1/0x280 drivers/base/bus.c:491
    [<000000005bd7adef>] device_add+0x131d/0x1c40 drivers/base/core.c:2504
    [<00000000a0937814>] usb_set_configuration+0xe84/0x1ab0
drivers/usb/core/message.c:2030
    [<00000000e3934741>] generic_probe+0x6a/0xe0 drivers/usb/core/generic.c:210
    [<0000000098ade0f1>] usb_probe_device+0x90/0xd0
drivers/usb/core/driver.c:266
    [<000000007806c118>] really_probe+0x48d/0x8f0 drivers/base/dd.c:551
    [<00000000a3308c3e>] driver_probe_device+0xfc/0x2a0 drivers/base/dd.c:724

Acked-by: Alan Stern 
Reported-by: Kyungtae Kim 
Signed-off-by: Zqiang 
Link: https://lore.kernel.org/r/20200612035210.20494-1-qiang.zhang@windriver.com
Signed-off-by: Greg Kroah-Hartman

usb: misc: usbtest: add super-speed isoc support

2019-02-13T11:03:23+00:00

The calculation of packet number within microframe is different between
high-speed and super-speed endpoint, we add support for super-speed
in this patch.

Cc: Pawel Laszczak 
Signed-off-by: Peter Chen 
Signed-off-by: Felipe Balbi

usb: usbtest: use irqsave() in USB's complete callback

2018-07-06T14:36:19+00:00

The USB completion callback does not disable interrupts while acquiring
the lock. We want to remove the local_irq_disable() invocation from
__usb_hcd_giveback_urb() and therefore it is required for the callback
handler to disable the interrupts while acquiring the lock.
The callback may be invoked either in IRQ or BH context depending on the
USB host controller.
Use the _irqsave() variant of the locking primitives.

Cc: Greg Kroah-Hartman 
Acked-by: Alan Stern 
Signed-off-by: Sebastian Andrzej Siewior 
Signed-off-by: Greg Kroah-Hartman

usb: usbtest: Remove stack VLA usage

2018-03-09T17:10:22+00:00

The kernel would like to have all stack VLA usage removed[1].  We
already have a pre-processor constant defined MAX_SGLEN.  We can use
this instead of the variable param-sglen.

[1]: https://lkml.org/lkml/2018/3/7/621

Signed-off-by: Tobin C. Harding 
Signed-off-by: Greg Kroah-Hartman

usb: usbtest: Add TEST 29, toggle sync, Clear toggle between bulk writes

2017-12-15T19:45:44+00:00

Clear Feature Endpoint Halt should reset the data toggle even if the
endpoint isn't halted. Host should manage to clear the host side data
toggle to keep in sync with the device.

Test by sending a "3 data packet URB" before and after clearing the halt.
this should create a toggle sequence with two consecutive DATA0 packets.

A successful test sequence looks like this
    ClearFeature(ENDPOINT_HALT) - initial toggle clear
  DATA0 (max packet sized)
  DATA1 (max packet sized)
  DATA0 (zero length packet)
    ClearFeature(ENDPOINT_HALT) - resets toggle
  DATA0 (max packet sized), if clear halt fails then toggle is DATA1
  DATA1 (max packet sized)
  DATA0 (zero length packet)

Signed-off-by: Mathias Nyman 
Acked-by: Alan Stern 
Signed-off-by: Greg Kroah-Hartman