[PATCH-v2.6.39] spi/omap_mcspi: Fix broken last word xfer

Commit Message

Jarkko Nikula March 21, 2011, 2:27 p.m. UTC

None

Patch

diff --git a/drivers/spi/omap2_mcspi.c b/drivers/spi/omap2_mcspi.c
index 3a5ed06..6f86ba0 100644
--- a/drivers/spi/omap2_mcspi.c
+++ b/drivers/spi/omap2_mcspi.c
@@ -517,7 +517,7 @@  omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
 				dev_vdbg(&spi->dev, "read-%d %02x\n",
 						word_len, *(rx - 1));
 			}
-		} while (c > (word_len>>3));
+		} while (c);
 	} else if (word_len <= 16) {
 		u16		*rx;
 		const u16	*tx;
@@ -564,7 +564,7 @@  omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
 				dev_vdbg(&spi->dev, "read-%d %04x\n",
 						word_len, *(rx - 1));
 			}
-		} while (c > (word_len>>3));
+		} while (c >= 2);
 	} else if (word_len <= 32) {
 		u32		*rx;
 		const u32	*tx;
@@ -611,7 +611,7 @@  omap2_mcspi_txrx_pio(struct spi_device *spi, struct spi_transfer *xfer)
 				dev_vdbg(&spi->dev, "read-%d %08x\n",
 						word_len, *(rx - 1));
 			}
-		} while (c > (word_len>>3));
+		} while (c >= 4);
 	}
 
 	/* for TX_ONLY mode, be sure all words have shifted out */