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USB: move snd_usb_pipe_sanity_check into the USB core 

snd_usb_pipe_sanity_check() is a great function, so let's move it into
the USB core so that other parts of the kernel, including the USB core,
can call it.

Name it usb_pipe_type_check() to match the existing
usb_urb_ep_type_check() call, which now uses this function.

Cc: Jaroslav Kysela <perex@perex.cz>
Cc: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Cc: Eli Billauer <eli.billauer@gmail.com>
Cc: Emiliano Ingrassia <ingrassia@epigenesys.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Alexander Tsoy <alexander@tsoy.me>
Cc: "Geoffrey D. Bennett" <g@b4.vu>
Cc: Jussi Laako <jussi@sonarnerd.net>
Cc: Nick Kossifidis <mickflemm@gmail.com>
Cc: Dmitry Panchenko <dmitry@d-systems.ee>
Cc: Chris Wulff <crwulff@gmail.com>
Cc: Jesus Ramos <jesus-ramos@live.com>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20200914153756.3412156-2-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2020-09-14 17:37:46 +02:00
parent a4e6451d32
commit fcc2cc1f35
6 changed files with 33 additions and 32 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
drivers/usb/core/urb.c
View File

@ -191,6 +191,28 @@ static const int pipetypes[4] = {
PIPE_CONTROL, PIPE_ISOCHRONOUS, PIPE_BULK, PIPE_INTERRUPT
};
/**
* usb_pipe_type_check - sanity check of a specific pipe for a usb device
* @dev: struct usb_device to be checked
* @pipe: pipe to check
*
* This performs a light-weight sanity check for the endpoint in the
* given usb device. It returns 0 if the pipe is valid for the specific usb
* device, otherwise a negative error code.
*/
int usb_pipe_type_check(struct usb_device *dev, unsigned int pipe)
{
const struct usb_host_endpoint *ep;
ep = usb_pipe_endpoint(dev, pipe);
if (!ep)
return -EINVAL;
if (usb_pipetype(pipe) != pipetypes[usb_endpoint_type(&ep->desc)])
return -EINVAL;
return 0;
}
EXPORT_SYMBOL_GPL(usb_pipe_type_check);
/**
* usb_urb_ep_type_check - sanity check of endpoint in the given urb
* @urb: urb to be checked
@ -201,14 +223,7 @@ static const int pipetypes[4] = {
*/
int usb_urb_ep_type_check(const struct urb *urb)
{
const struct usb_host_endpoint *ep;
ep = usb_pipe_endpoint(urb->dev, urb->pipe);
if (!ep)
return -EINVAL;
if (usb_pipetype(urb->pipe) != pipetypes[usb_endpoint_type(&ep->desc)])
return -EINVAL;
return 0;
return usb_pipe_type_check(urb->dev, urb->pipe);
}
EXPORT_SYMBOL_GPL(usb_urb_ep_type_check);
@ -474,7 +489,7 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags)
*/
/* Check that the pipe's type matches the endpoint's type */
if (usb_urb_ep_type_check(urb))
if (usb_pipe_type_check(urb->dev, urb->pipe))
dev_WARN(&dev->dev, "BOGUS urb xfer, pipe %x != type %x\n",
usb_pipetype(urb->pipe), pipetypes[xfertype]);

1
include/linux/usb.h
View File

@ -1764,6 +1764,7 @@ static inline int usb_urb_dir_out(struct urb *urb)
return (urb->transfer_flags & URB_DIR_MASK) == URB_DIR_OUT;
}
int usb_pipe_type_check(struct usb_device *dev, unsigned int pipe);
int usb_urb_ep_type_check(const struct urb *urb);
void *usb_alloc_coherent(struct usb_device *dev, size_t size,

16
sound/usb/helper.c
View File

@ -63,20 +63,6 @@ void *snd_usb_find_csint_desc(void *buffer, int buflen, void *after, u8 dsubtype
return NULL;
}
/* check the validity of pipe and EP types */
int snd_usb_pipe_sanity_check(struct usb_device *dev, unsigned int pipe)
{
static const int pipetypes[4] = {
PIPE_CONTROL, PIPE_ISOCHRONOUS, PIPE_BULK, PIPE_INTERRUPT
};
struct usb_host_endpoint *ep;
ep = usb_pipe_endpoint(dev, pipe);
if (!ep || usb_pipetype(pipe) != pipetypes[usb_endpoint_type(&ep->desc)])
return -EINVAL;
return 0;
}
/*
* Wrapper for usb_control_msg().
* Allocates a temp buffer to prevent dmaing from/to the stack.
@ -89,7 +75,7 @@ int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe, __u8 request,
void *buf = NULL;
int timeout;
if (snd_usb_pipe_sanity_check(dev, pipe))
if (usb_pipe_type_check(dev, pipe))
return -EINVAL;
if (size > 0) {

1
sound/usb/helper.h
View File

@ -7,7 +7,6 @@ unsigned int snd_usb_combine_bytes(unsigned char *bytes, int size);
void *snd_usb_find_desc(void *descstart, int desclen, void *after, u8 dtype);
void *snd_usb_find_csint_desc(void *descstart, int desclen, void *after, u8 dsubtype);
int snd_usb_pipe_sanity_check(struct usb_device *dev, unsigned int pipe);
int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe,
__u8 request, __u8 requesttype, __u16 value, __u16 index,
void *data, __u16 size);

2
sound/usb/mixer_scarlett_gen2.c
View File

@ -1978,7 +1978,7 @@ static int scarlett2_mixer_status_create(struct usb_mixer_interface *mixer)
return 0;
}
if (snd_usb_pipe_sanity_check(dev, pipe))
if (usb_pipe_type_check(dev, pipe))
return -EINVAL;
mixer->urb = usb_alloc_urb(0, GFP_KERNEL);

12
sound/usb/quirks.c
View File

@ -856,7 +856,7 @@ static int snd_usb_accessmusic_boot_quirk(struct usb_device *dev)
static const u8 seq[] = { 0x4e, 0x73, 0x52, 0x01 };
void *buf;
if (snd_usb_pipe_sanity_check(dev, usb_sndintpipe(dev, 0x05)))
if (usb_pipe_type_check(dev, usb_sndintpipe(dev, 0x05)))
return -EINVAL;
buf = kmemdup(seq, ARRAY_SIZE(seq), GFP_KERNEL);
if (!buf)
@ -885,7 +885,7 @@ static int snd_usb_nativeinstruments_boot_quirk(struct usb_device *dev)
{
int ret;
if (snd_usb_pipe_sanity_check(dev, usb_sndctrlpipe(dev, 0)))
if (usb_pipe_type_check(dev, usb_sndctrlpipe(dev, 0)))
return -EINVAL;
ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
0xaf, USB_TYPE_VENDOR | USB_RECIP_DEVICE,
@ -994,7 +994,7 @@ static int snd_usb_axefx3_boot_quirk(struct usb_device *dev)
dev_dbg(&dev->dev, "Waiting for Axe-Fx III to boot up...\n");
if (snd_usb_pipe_sanity_check(dev, usb_sndctrlpipe(dev, 0)))
if (usb_pipe_type_check(dev, usb_sndctrlpipe(dev, 0)))
return -EINVAL;
/* If the Axe-Fx III has not fully booted, it will timeout when trying
* to enable the audio streaming interface. A more generous timeout is
@ -1028,7 +1028,7 @@ static int snd_usb_motu_microbookii_communicate(struct usb_device *dev, u8 *buf,
{
int err, actual_length;
if (snd_usb_pipe_sanity_check(dev, usb_sndintpipe(dev, 0x01)))
if (usb_pipe_type_check(dev, usb_sndintpipe(dev, 0x01)))
return -EINVAL;
err = usb_interrupt_msg(dev, usb_sndintpipe(dev, 0x01), buf, *length,
&actual_length, 1000);
@ -1040,7 +1040,7 @@ static int snd_usb_motu_microbookii_communicate(struct usb_device *dev, u8 *buf,
memset(buf, 0, buf_size);
if (snd_usb_pipe_sanity_check(dev, usb_rcvintpipe(dev, 0x82)))
if (usb_pipe_type_check(dev, usb_rcvintpipe(dev, 0x82)))
return -EINVAL;
err = usb_interrupt_msg(dev, usb_rcvintpipe(dev, 0x82), buf, buf_size,
&actual_length, 1000);
@ -1127,7 +1127,7 @@ static int snd_usb_motu_m_series_boot_quirk(struct usb_device *dev)
{
int ret;
if (snd_usb_pipe_sanity_check(dev, usb_sndctrlpipe(dev, 0)))
if (usb_pipe_type_check(dev, usb_sndctrlpipe(dev, 0)))
return -EINVAL;
ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
1, USB_TYPE_VENDOR | USB_RECIP_DEVICE,