From: Ben Dooks Date: Mon, 19 Jul 2010 08:40:41 +0000 (+0100) Subject: USB: s3c-hsotg: The NPTX/PTX FIFO sizes are in words, not bytes X-Git-Tag: upstream/snapshot3+hdmi~13509^2~39 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=679f9b7c7c7d3c746792138e9d7d76578ef52c41;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git USB: s3c-hsotg: The NPTX/PTX FIFO sizes are in words, not bytes Fix a problem where we have been underestimating the space available in the IN PTX/NPTX FIFOs by assuming that they where simply word aligned instead of in number-of-words. This means all length calculations need to be multiplied-by-4. Note, we do not change the information about fifo size or start addresses available to userspace as we assume the user can multiply by four easily and is already knows these values are in words. Signed-off-by: Ben Dooks Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c index 81f62da..4a25145 100644 --- a/drivers/usb/gadget/s3c-hsotg.c +++ b/drivers/usb/gadget/s3c-hsotg.c @@ -505,6 +505,7 @@ static int s3c_hsotg_write_fifo(struct s3c_hsotg *hsotg, } can_write = S3C_GNPTXSTS_NPTxFSpcAvail_GET(gnptxsts); + can_write *= 4; /* fifo size is in 32bit quantities. */ } dev_dbg(hsotg->dev, "%s: GNPTXSTS=%08x, can=%d, to=%d, mps %d\n", @@ -2732,7 +2733,7 @@ static void __devinit s3c_hsotg_initep(struct s3c_hsotg *hsotg, */ ptxfifo = readl(hsotg->regs + S3C_DPTXFSIZn(epnum)); - hs_ep->fifo_size = S3C_DPTXFSIZn_DPTxFSize_GET(ptxfifo); + hs_ep->fifo_size = S3C_DPTXFSIZn_DPTxFSize_GET(ptxfifo) * 4; /* if we're using dma, we need to set the next-endpoint pointer * to be something valid.