From 88d89526a671ba008f59456161b0c513cdfb5d5a Mon Sep 17 00:00:00 2001 From: Andrey Yurovsky Date: Fri, 31 Jul 2009 11:35:19 -0700 Subject: [PATCH] libertas: check valid bits in SPI bus mode reg The SPI driver writes to the bus mode register and performs a sanity check by reading back what we wrote, however only the lower four bits of that register are defined. In some cases, the device side seems to set the higher bits, causing us to fail the sanity check unnecessarily. Check only the lower four bits instead. Thanks to John Goyette from Schick Technologies for pointing out the problem. Signed-off-by: Andrey Yurovsky Signed-off-by: John W. Linville --- drivers/net/wireless/libertas/if_spi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/libertas/if_spi.c b/drivers/net/wireless/libertas/if_spi.c index 963c201..446e327 100644 --- a/drivers/net/wireless/libertas/if_spi.c +++ b/drivers/net/wireless/libertas/if_spi.c @@ -376,7 +376,7 @@ static int spu_set_bus_mode(struct if_spi_card *card, u16 mode) err = spu_read_u16(card, IF_SPI_SPU_BUS_MODE_REG, &rval); if (err) return err; - if (rval != mode) { + if ((rval & 0xF) != mode) { lbs_pr_err("Can't read bus mode register.\n"); return -EIO; } -- 1.8.2.3