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usb: usbtest: fix the bit mask of usb 2.0 extension descriptor 

USB 2.1 Link PM adds to use bits[1:15] according to USB 2.0 ECN Errata for
Link Power Management spec.

Bit	Encoding
0	Reserved
1	LPM
2	BESL & Altemate HIRD definitions supported
3	Recommended Baseline BESL valid
4	Recommended Deep BESL valid
11:8	Recommended Baseline BESL value
15:12	Recommended Deep BESL value
31:16	Reserved

So fix the bit mask from 0x1e to 0xfffe.

Reported-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Huang Rui <ray.huang@amd.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Huang Rui 2013-11-13 22:35:14 +08:00 committed by Greg Kroah-Hartman
parent c952a8ba71
commit 875bc23ac0
1 changed files with 2 additions and 2 deletions
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4
drivers/usb/misc/usbtest.c
View File

@ -619,8 +619,8 @@ static int is_good_ext(struct usbtest_dev *tdev, u8 *buf)
}
attr = le32_to_cpu(ext->bmAttributes);
/* bits[1:4] is used and others are reserved */
if (attr & ~0x1e) { /* reserved == 0 */
/* bits[1:15] is used and others are reserved */
if (attr & ~0xfffe) { /* reserved == 0 */
ERROR(tdev, "reserved bits set\n");
return 0;
}