On Tue, May 17, 2011 at 10:50:17AM +0530, Shreshtha Kumar SAHU wrote: > From: Shreshtha Kumar Sahu <shreshthakumar.sahu@xxxxxxxxxxxxxx> > > This workaround aims to break the deadlock situation > which raises during continuous transfer of data for long > duration over uart with hardware flow control. It is > observed that CTS interrupt cannot be cleared in uart > interrupt register (ICR). Hence further transfer over > uart gets blocked. > > It is seen that during such deadlock condition ICR > don't get cleared even on multiple write. This leads > pass_counter to decrease and finally reach zero. This > can be taken as trigger point to run this UART_BT_WA. > > Workaround backups the register configuration, does soft > reset of UART using BIT-0 of PRCC_K_SOFTRST_SET/CLEAR > registers and restores the registers. > > This patch also provides support for uart init and exit > function calls if present. Why? You don't use these callbacks in this driver, so why add them? confused, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
