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

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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 <[email protected]>
Reviewed-by: James Hogan <[email protected]>
Signed-off-by: Chris Ball <[email protected]>
This commit is contained in:
Jaehoon Chung 2012-01-11 09:28:21 +00:00 • committed by Chris Ball
commit 8234e86960
1 changed files with 1 additions and 1 deletions
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2
drivers/mmc/host/dw_mmc.c
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@ -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;
}