Touch doesnt work in lock screen after resuming from sleep

In file drivers/i2c/busses/i2c-s3c2410.c, function,
static int s3c24xx_i2c_set_master(struct s3c24xx_i2c *i2c)
{
unsigned long iicstat;
int timeout = 400;

while (timeout-- > 0) {
iicstat = readl(i2c->regs + S3C2410_IICSTAT);

if (!(iicstat & S3C2410_IICSTAT_BUSBUSY))
return 0;

msleep(1);
}

return -ETIMEDOUT;
}

Some how the bus is busy even after 400 iterations. The i2c adaptor may be going to some invalid state. Added,

writel(iicstat & ~S3C2410_IICSTAT_TXRXEN, i2c->regs + S3C2410_IICSTAT);

after the msleep(1). This will disable the Rx/Tx of the i2c adapter, which is later enabled. So basically its a reset of the register

I2C-bus data output enable/ disable bit.
0 = Disables Rx/Tx,
1 = Enables Rx/Tx

This blog looks interesting about the i2c drive in linux-2.6.32
http://www.embedded-bits.co.uk/?p=174