From: Robert Baldyga Date: Wed, 9 Oct 2013 06:20:02 +0000 (+0200) Subject: usb: gadget: s3c-hsotg: fix set_ep_maxpacket function X-Git-Tag: firefly_0821_release~176^2~5061^2~22^2~48 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=e9edd199d69034fa163c97ef310ca72dca9cf030;p=firefly-linux-kernel-4.4.55.git usb: gadget: s3c-hsotg: fix set_ep_maxpacket function This patch fixes max packet size check in s3c_hsotg_set_ep_maxpacket() function. According USB specification, bits 10..0 of mps specifies maximum packet size, so there is bitwise AND between mps and 0x7ff value. Also added check if maxpacket isn't grater than 1024 which is maximum size od single USB transaction. In s3c_hsotg_ep_enable() function added s3c_hsotg_set_ep_maxpacket() call instead of setting ep.maxpacket value directly. Signed-off-by: Robert Baldyga Signed-off-by: Kyungmin Park Signed-off-by: Felipe Balbi --- diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c index 4691df732c42..424b2ad00ec7 100644 --- a/drivers/usb/gadget/s3c-hsotg.c +++ b/drivers/usb/gadget/s3c-hsotg.c @@ -1705,15 +1705,14 @@ static void s3c_hsotg_set_ep_maxpacket(struct s3c_hsotg *hsotg, mpsval = s3c_hsotg_ep0_mps(mps); if (mpsval > 3) goto bad_mps; + hs_ep->ep.maxpacket = mps; } else { - if (mps >= DxEPCTL_MPS_LIMIT+1) + mpsval = mps & DxEPCTL_MPS_MASK; + if (mpsval > 1024) goto bad_mps; - - mpsval = mps; + hs_ep->ep.maxpacket = mpsval; } - hs_ep->ep.maxpacket = mps; - /* * update both the in and out endpoint controldir_ registers, even * if one of the directions may not be in use. @@ -2579,7 +2578,7 @@ static int s3c_hsotg_ep_enable(struct usb_ep *ep, epctrl |= DxEPCTL_SNAK; /* update the endpoint state */ - hs_ep->ep.maxpacket = mps; + s3c_hsotg_set_ep_maxpacket(hsotg, hs_ep->index, mps); /* default, set to non-periodic */ hs_ep->periodic = 0;