DMAENGINE: DMA40 fix for allocation of logical channel 0

Fix for allocation failure of logical channel when event line
happens to be number 0.

Signed-off-by: Marcin Mielczarczyk <marcin.mielczarczyk@tieto.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index 16a7d2b..81fec95 100644 (file)
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -1039,11 +1039,11 @@ static int d40_validate_conf(struct d40_chan *d40c,
 }
 
 static bool d40_alloc_mask_set(struct d40_phy_res *phy, bool is_src,
-                              int log_event_line)
+                              int log_event_line, bool is_log)
 {
        unsigned long flags;
        spin_lock_irqsave(&phy->lock, flags);
-       if (!log_event_line) {
+       if (!is_log) {
                /* Physical interrupts are masked per physical full channel */
                if (phy->allocated_src == D40_ALLOC_FREE &&
                    phy->allocated_dst == D40_ALLOC_FREE) {
@@ -1161,15 +1161,16 @@ static int d40_allocate_channel(struct d40_chan *d40c)
                        /* Find physical half channel */
                        for (i = 0; i < d40c->base->num_phy_chans; i++) {
 
-                               if (d40_alloc_mask_set(&phys[i], is_src, 0))
+                               if (d40_alloc_mask_set(&phys[i], is_src,
+                                                      0, is_log))
                                        goto found_phy;
                        }
                } else
                        for (j = 0; j < d40c->base->num_phy_chans; j += 8) {
                                int phy_num = j  + event_group * 2;
                                for (i = phy_num; i < phy_num + 2; i++) {
-                                       if (d40_alloc_mask_set(&phys[i],
-                                                              is_src, 0))
+                                       if (d40_alloc_mask_set(&phys[i], is_src,
+                                                              0, is_log))
                                                goto found_phy;
                                }
                        }
@@ -1193,13 +1194,13 @@ found_phy:
                if (is_src) {
                        for (i = phy_num; i < phy_num + 2; i++) {
                                if (d40_alloc_mask_set(&phys[i], is_src,
-                                                      event_line))
+                                                      event_line, is_log))
                                        goto found_log;
                        }
                } else {
                        for (i = phy_num + 1; i >= phy_num; i--) {
                                if (d40_alloc_mask_set(&phys[i], is_src,
-                                                      event_line))
+                                                      event_line, is_log))
                                        goto found_log;
                        }
                }