Commit 8234e869 authored Jan 11, 2012 by Jaehoon Chung Committed by Chris Ball Jan 12, 2012

mmc: dw_mmc: miscaculated the fifo-depth with wrong bit operation



In FIFOTH register, the RX_WMark field (bits[27:16]) defaults to
FIFO_DEPTH - 1. When reading it, bits[26:16] were being used, so
fix it to use the mask 0xfff instead of 0x7ff.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

parent 069c9f14

drivers/mmc/host/dw_mmc.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1949,7 +1949,7 @@ static int dw_mci_probe(struct platform_device *pdev)
		* should put it in the platform data.
		*/
		fifo_size = mci_readl(host, FIFOTH);
		fifo_size = 1 + ((fifo_size >> 16) & 0x7ff);
		fifo_size = 1 + ((fifo_size >> 16) & 0xfff);
		} else {
		fifo_size = host->pdata->fifo_depth;
		}