dmaengine: imx-sdma: Fix: Remove 'always true' comparison

event_id0 is defined as 'unsigned int', so it is always greater or
equal to zero.

Remove the unneeded comparisons to fix the following W=1 build
warning:

drivers/dma/imx-sdma.c: In function 'sdma_free_chan_resources':
drivers/dma/imx-sdma.c:1334:23: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits]
1334 |  if (sdmac->event_id0 >= 0)
|                       ^~
drivers/dma/imx-sdma.c: In function 'sdma_config':
drivers/dma/imx-sdma.c:1635:23: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits]
1635 |  if (sdmac->event_id0 >= 0) {
|

Fixes: 25962e1a7f1d ("dmaengine: imx-sdma: Fix the event id check to include RX event for UART6")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Reviewed-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Link: https://lore.kernel.org/r/20200621155730.28766-1-festevam@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index 9177403..270992c 100644 (file)
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -1331,8 +1331,7 @@ static void sdma_free_chan_resources(struct dma_chan *chan)
 
        sdma_channel_synchronize(chan);
 
-       if (sdmac->event_id0 >= 0)
-               sdma_event_disable(sdmac, sdmac->event_id0);
+       sdma_event_disable(sdmac, sdmac->event_id0);
        if (sdmac->event_id1)
                sdma_event_disable(sdmac, sdmac->event_id1);
 
@@ -1632,11 +1631,9 @@ static int sdma_config(struct dma_chan *chan,
        memcpy(&sdmac->slave_config, dmaengine_cfg, sizeof(*dmaengine_cfg));
 
        /* Set ENBLn earlier to make sure dma request triggered after that */
-       if (sdmac->event_id0 >= 0) {
-               if (sdmac->event_id0 >= sdmac->sdma->drvdata->num_events)
-                       return -EINVAL;
-               sdma_event_enable(sdmac, sdmac->event_id0);
-       }
+       if (sdmac->event_id0 >= sdmac->sdma->drvdata->num_events)
+               return -EINVAL;
+       sdma_event_enable(sdmac, sdmac->event_id0);
 
        if (sdmac->event_id1) {
                if (sdmac->event_id1 >= sdmac->sdma->drvdata->num_events)