From akpm@linux-foundation.org Mon Oct 26 16:21:48 2009 From: Pavel Machek Date: Fri, 18 Sep 2009 12:59:22 -0700 Subject: Staging: dream: Synaptics touchscreen for HTC Dream: check that smbus is available To: greg@kroah.com Cc: akpm@linux-foundation.org, pavel@ucw.cz, arve@android.com, dtor@mail.ru, soni.trilok@gmail.com, swetland@google.com Message-ID: <200909181959.n8IJxMfp006395@imap1.linux-foundation.org> From: Pavel Machek Check that SMBUS APIs are available in touchscreen driver. Signed-off-by: Pavel Machek Cc: Trilok Soni Cc: Cc: Brian Swetland Cc: Dmitry Torokhov Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman --- drivers/staging/dream/synaptics_i2c_rmi.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/drivers/staging/dream/synaptics_i2c_rmi.c +++ b/drivers/staging/dream/synaptics_i2c_rmi.c @@ -379,6 +379,12 @@ static int __devinit synaptics_ts_probe( goto err_check_functionality_failed; } + if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WORD_DATA)) { + pr_err("synaptics_ts_probe: need I2C_FUNC_SMBUS_WORD_DATA\n"); + ret = -ENODEV; + goto err_check_functionality_failed; + } + ts = kzalloc(sizeof(*ts), GFP_KERNEL); if (ts == NULL) { ret = -ENOMEM;