[PATCH v3 4/7] usb: cdnsp: fix the wrong mult value for HS isoc or intr
From: Chunfeng Yun <chunfeng.yun@mediatek.com>
Date: 2021-08-13 06:32:04
Also in:
linux-mediatek, linux-tegra, linux-usb, lkml, stable
Subsystem:
cadence usbssp drd ip driver, the rest, usb subsystem · Maintainers:
Pawel Laszczak, Linus Torvalds, Greg Kroah-Hartman
usb_endpoint_maxp() only returns the bit[10:0] of wMaxPacketSize
of endpoint descriptor, not include bit[12:11] anymore, so use
usb_endpoint_maxp_mult() instead.
Fixes: 3d82904559f4 ("usb: cdnsp: cdns3 Add main part of Cadence USBSSP DRD Driver")
Cc: stable@vger.kernel.org
Acked-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
---
v3: fix invalid email format for stable
v2: add fixes, cc suggested by Felipe
---
drivers/usb/cdns3/cdnsp-mem.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/cdns3/cdnsp-mem.c b/drivers/usb/cdns3/cdnsp-mem.c
index a47948a1623f..ad9aee3f1e39 100644
--- a/drivers/usb/cdns3/cdnsp-mem.c
+++ b/drivers/usb/cdns3/cdnsp-mem.c@@ -882,7 +882,7 @@ static u32 cdnsp_get_endpoint_max_burst(struct usb_gadget *g, if (g->speed == USB_SPEED_HIGH && (usb_endpoint_xfer_isoc(pep->endpoint.desc) || usb_endpoint_xfer_int(pep->endpoint.desc))) - return (usb_endpoint_maxp(pep->endpoint.desc) & 0x1800) >> 11; + return usb_endpoint_maxp_mult(pep->endpoint.desc) - 1; return 0; }
--
2.18.0
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