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USB: EHCI: declare hostpc register as zero-length array

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commit 7e8b3dfef1 upstream.

The HOSTPC extension registers found in some EHCI implementations form
a variable-length array, with one element for each port.  Therefore
the hostpc field in struct ehci_regs should be declared as a
zero-length array, not a single-element array.

This fixes a problem reported by UBSAN.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-by: Wilfried Klaebe <linux-kernel@lebenslange-mailadresse.de>
Tested-by: Wilfried Klaebe <linux-kernel@lebenslange-mailadresse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alan Stern
2016-06-23 14:54:37 -04:00
committed by Greg Kroah-Hartman
parent 7b74d56f6a
commit 7577b85419
1 changed files with 2 additions and 2 deletions
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4
include/linux/usb/ehci_def.h
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@@ -180,11 +180,11 @@ struct ehci_regs {
* PORTSCx
*/
/* HOSTPC: offset 0x84 */
u32 hostpc[1]; /* HOSTPC extension */
u32 hostpc[0]; /* HOSTPC extension */
#define HOSTPC_PHCD (1<<22) /* Phy clock disable */
#define HOSTPC_PSPD (3<<25) /* Port speed detection */
u32 reserved5[16];
u32 reserved5[17];
/* USBMODE_EX: offset 0xc8 */
u32 usbmode_ex; /* USB Device mode extension */