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Code Issues Releases Wiki Activity

usb: gadget: udc: do not clear gadget driver.bus

Browse source 
Before the commit fc274c1e99 ("USB: gadget: Add a new bus for gadgets")
gadget driver.bus was unused. For whatever reason, many UDC drivers set
this field explicitly to NULL in udc_start(). With the newly added gadget
bus, doing this will crash the driver during the attach.

The problem was first reported, fixed and tested with OMAP UDC and g_ether.
Other drivers are changed based on code analysis only.

Fixes: fc274c1e99 ("USB: gadget: Add a new bus for gadgets")
Cc: stable <stable@kernel.org>
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20230201220125.GD2415@darkstar.musicnaut.iki.fi
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Aaro Koskinen 2023-02-02 00:01:25 +02:00 committed by Greg Kroah-Hartman
parent 2fa89458af
commit 30d09b3131
16 changed files with 0 additions and 16 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
drivers/usb/fotg210/fotg210-udc.c
View file

@ -1014,7 +1014,6 @@ static int fotg210_udc_start(struct usb_gadget *g,
int ret;
/* hook up the driver */
driver->driver.bus = NULL;
fotg210->driver = driver;
if (!IS_ERR_OR_NULL(fotg210->phy)) {

1
drivers/usb/gadget/udc/bcm63xx_udc.c
View file

@ -1830,7 +1830,6 @@ static int bcm63xx_udc_start(struct usb_gadget *gadget,
bcm63xx_select_phy_mode(udc, true);
udc->driver = driver;
driver->driver.bus = NULL;
udc->gadget.dev.of_node = udc->dev->of_node;
spin_unlock_irqrestore(&udc->lock, flags);

1
drivers/usb/gadget/udc/fsl_qe_udc.c
View file

@ -2285,7 +2285,6 @@ static int fsl_qe_start(struct usb_gadget *gadget,
/* lock is needed but whether should use this lock or another */
spin_lock_irqsave(&udc->lock, flags);
driver->driver.bus = NULL;
/* hook up the driver */
udc->driver = driver;
udc->gadget.speed = driver->max_speed;

1
drivers/usb/gadget/udc/fsl_udc_core.c
View file

@ -1943,7 +1943,6 @@ static int fsl_udc_start(struct usb_gadget *g,
/* lock is needed but whether should use this lock or another */
spin_lock_irqsave(&udc_controller->lock, flags);
driver->driver.bus = NULL;
/* hook up the driver */
udc_controller->driver = driver;
spin_unlock_irqrestore(&udc_controller->lock, flags);

1
drivers/usb/gadget/udc/fusb300_udc.c
View file

@ -1311,7 +1311,6 @@ static int fusb300_udc_start(struct usb_gadget *g,
struct fusb300 *fusb300 = to_fusb300(g);
/* hook up the driver */
driver->driver.bus = NULL;
fusb300->driver = driver;
return 0;

1
drivers/usb/gadget/udc/goku_udc.c
View file

@ -1375,7 +1375,6 @@ static int goku_udc_start(struct usb_gadget *g,
struct goku_udc *dev = to_goku_udc(g);
/* hook up the driver */
driver->driver.bus = NULL;
dev->driver = driver;
/*

1
drivers/usb/gadget/udc/gr_udc.c
View file

@ -1906,7 +1906,6 @@ static int gr_udc_start(struct usb_gadget *gadget,
spin_lock(&dev->lock);
/* Hook up the driver */
driver->driver.bus = NULL;
dev->driver = driver;
/* Get ready for host detection */

1
drivers/usb/gadget/udc/m66592-udc.c
View file

@ -1454,7 +1454,6 @@ static int m66592_udc_start(struct usb_gadget *g,
struct m66592 *m66592 = to_m66592(g);
/* hook up the driver */
driver->driver.bus = NULL;
m66592->driver = driver;
m66592_bset(m66592, M66592_VBSE | M66592_URST, M66592_INTENB0);

1
drivers/usb/gadget/udc/max3420_udc.c
View file

@ -1108,7 +1108,6 @@ static int max3420_udc_start(struct usb_gadget *gadget,
spin_lock_irqsave(&udc->lock, flags);
/* hook up the driver */
driver->driver.bus = NULL;
udc->driver = driver;
udc->gadget.speed = USB_SPEED_FULL;

1
drivers/usb/gadget/udc/mv_u3d_core.c
View file

@ -1243,7 +1243,6 @@ static int mv_u3d_start(struct usb_gadget *g,
}
/* hook up the driver ... */
driver->driver.bus = NULL;
u3d->driver = driver;
u3d->ep0_dir = USB_DIR_OUT;

1
drivers/usb/gadget/udc/mv_udc_core.c
View file

@ -1359,7 +1359,6 @@ static int mv_udc_start(struct usb_gadget *gadget,
spin_lock_irqsave(&udc->lock, flags);
/* hook up the driver ... */
driver->driver.bus = NULL;
udc->driver = driver;
udc->usb_state = USB_STATE_ATTACHED;

1
drivers/usb/gadget/udc/net2272.c
View file

@ -1451,7 +1451,6 @@ static int net2272_start(struct usb_gadget *_gadget,
dev->ep[i].irqs = 0;
/* hook up the driver ... */
dev->softconnect = 1;
driver->driver.bus = NULL;
dev->driver = driver;
/* ... then enable host detection and ep0; and we're ready

1
drivers/usb/gadget/udc/net2280.c
View file

@ -2423,7 +2423,6 @@ static int net2280_start(struct usb_gadget *_gadget,
dev->ep[i].irqs = 0;
/* hook up the driver ... */
driver->driver.bus = NULL;
dev->driver = driver;
retval = device_create_file(&dev->pdev->dev, &dev_attr_function);

1
drivers/usb/gadget/udc/omap_udc.c
View file

@ -2066,7 +2066,6 @@ static int omap_udc_start(struct usb_gadget *g,
udc->softconnect = 1;
/* hook up the driver */
driver->driver.bus = NULL;
udc->driver = driver;
spin_unlock_irqrestore(&udc->lock, flags);

1
drivers/usb/gadget/udc/pch_udc.c
View file

@ -2908,7 +2908,6 @@ static int pch_udc_start(struct usb_gadget *g,
{
struct pch_udc_dev *dev = to_pch_udc(g);
driver->driver.bus = NULL;
dev->driver = driver;
/* get ready for ep0 traffic */

1
drivers/usb/gadget/udc/snps_udc_core.c
View file

@ -1933,7 +1933,6 @@ static int amd5536_udc_start(struct usb_gadget *g,
struct udc *dev = to_amd5536_udc(g);
u32 tmp;
driver->driver.bus = NULL;
dev->driver = driver;
/* Some gadget drivers use both ep0 directions.