msm: gsi: Fix gsi stop channel fail for old target.

In older target we may not receive gsi interrupt while
stopping the channel in first retry, so we inject dma
1B packet while retrying. We were observing crash during
stop channel as we were reading channel current state
only after interrupt recieved. Now reading channel
current state in case we not recieved interrupt for
older target.

Change-Id: I4f436bee610ce6ccd5e0f4c982689c15291a2011
Signed-off-by: Piyush Dhyani <[email protected]>

drivers/platform/msm/gsi/gsi.c

@@ -225,6 +225,12 @@ static void gsi_channel_state_change_wait(unsigned long chan_hdl,
 				GSI_EE_n_CNTXT_SRC_GSI_CH_IRQ, ee);
 		}
 
+		if (gsi_ctx->per.ver == GSI_VER_1_0) {
+			gsihal_read_reg_nk_fields(GSI_EE_n_GSI_CH_k_CNTXT_0,
+				ee, chan_hdl, &ch_k_cntxt_0);
+			curr_state = ch_k_cntxt_0.chstate;
+		}
+
 		/* Update the channel state only if interrupt was raised
 		 * on particular channel and also checking global interrupt
 		 * is raised for channel control.