Hi Elvis, On Wed, Oct 27, 2010 at 3:24 PM, Elvis Dowson <[email protected]> wrote: > r...@beagleboard:/wlan# insmod sdio.ko ... > r...@beagleboard:/wlan# insmod tiwlan_drv.ko ... > r...@beagleboard:/wlan# ifconfig tiwlan0 up > [ 200.916687] TIWLAN: 2227.094325: pInitParams->RoamingScanning_2_4G_enable 0 > [ 200.924530] dashboard20_wifi_power: 1 > [ 200.943267] dashboard20_wifi_power: 0 > [ 200.947937] dashboard20_wifi_power: 1 > [ 201.020507] dashboard20_wifi_reset: 0 > [ 201.024200] dashboard20_wifi_set_carddetect: 1 > [ 201.029113] dashboard20_wifi_set_carddetect: Nobody to notify > [ 202.027465] tiwlan_sdio_probe not yet called > [ 202.031768] tiwlan_sdio_probe not yet called > <--------------------------------------------- > [ 202.036590] kernel BUG at drivers/mmc/core/sdio_io.c:28! > [ 202.041961] Unable to handle kernel NULL pointer dereference at virtual > address 00000000
The BUG is most probably in the driver you are using, and not in the SDIO layer. The driver is calling sdio_claim_host() without having a valid SDIO function. Check out the 2 lines above the BUG message - you have a log there complaining that your SDIO driver's probe function wasn't called. You actually seem to have two problems here: 1. Your SDIO driver's probe function isn't called 2. Your WLAN driver is using the SDIO API without having a valid SDIO function Ignoring the 2nd issue for now, you most probably have an integration problem. Is the chip powered up correctly ? is it mmc rescanned after it is powered up ? are you using the correct mmc controller ? have you configured your mmc lines correctly (board muxing) ? etc.. Maybe you want to checkout the mainline wl1271 driver using Luca's Beagle board patches :) Regards, Ohad. -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
