pistachio: drop Kernel 5.4 support

[openwrt/staging/mkresin.git] / target / linux / pistachio / patches-5.4 / 101-dmaengine-img-mdc-Handle-early-status-read.patch

diff --git a/target/linux/pistachio/patches-5.4/101-dmaengine-img-mdc-Handle-early-status-read.patch b/target/linux/pistachio/patches-5.4/101-dmaengine-img-mdc-Handle-early-status-read.patch
deleted file mode 100644 (file)
index 031a4e3..0000000
--- a/target/linux/pistachio/patches-5.4/101-dmaengine-img-mdc-Handle-early-status-read.patch
+++ /dev/null
@@ -1,68 +0,0 @@
-From a2dd154377c9aa6ddda00d39b8c7c334e4fa16ff Mon Sep 17 00:00:00 2001
-From: Damien Horsley <damien.horsley@imgtec.com>
-Date: Tue, 22 Mar 2016 12:46:09 +0000
-Subject: dmaengine: img-mdc: Handle early status read
-
-It is possible that mdc_tx_status may be called before the first
-node has been read from memory.
-
-In this case, the residue value stored in the register is undefined.
-Return the transfer size instead.
-
-Signed-off-by: Damien Horsley <damien.horsley@imgtec.com>
----
- drivers/dma/img-mdc-dma.c | 40 ++++++++++++++++++++++++----------------
- 1 file changed, 24 insertions(+), 16 deletions(-)
-
---- a/drivers/dma/img-mdc-dma.c
-+++ b/drivers/dma/img-mdc-dma.c
-@@ -618,25 +618,33 @@ static enum dma_status mdc_tx_status(str
-                       (MDC_CMDS_PROCESSED_CMDS_DONE_MASK + 1);
- 
-               /*
--               * If the command loaded event hasn't been processed yet, then
--               * the difference above includes an extra command.
-+               * If the first node has not yet been read from memory,
-+               * the residue register value is undefined
-                */
--              if (!mdesc->cmd_loaded)
--                      cmds--;
--              else
--                      cmds += mdesc->list_cmds_done;
--
--              bytes = mdesc->list_xfer_size;
--              ldesc = mdesc->list;
--              for (i = 0; i < cmds; i++) {
--                      bytes -= ldesc->xfer_size + 1;
--                      ldesc = ldesc->next_desc;
--              }
--              if (ldesc) {
--                      if (residue != MDC_TRANSFER_SIZE_MASK)
--                              bytes -= ldesc->xfer_size - residue;
-+              if (!mdesc->cmd_loaded && !cmds) {
-+                      bytes = mdesc->list_xfer_size;
-+              } else {
-+                      /*
-+                       * If the command loaded event hasn't been processed yet, then
-+                       * the difference above includes an extra command.
-+                       */
-+                      if (!mdesc->cmd_loaded)
-+                              cmds--;
-                       else
-+                              cmds += mdesc->list_cmds_done;
-+
-+                      bytes = mdesc->list_xfer_size;
-+                      ldesc = mdesc->list;
-+                      for (i = 0; i < cmds; i++) {
-                               bytes -= ldesc->xfer_size + 1;
-+                              ldesc = ldesc->next_desc;
-+                      }
-+                      if (ldesc) {
-+                              if (residue != MDC_TRANSFER_SIZE_MASK)
-+                                      bytes -= ldesc->xfer_size - residue;
-+                              else
-+                                      bytes -= ldesc->xfer_size + 1;
-+                      }
-               }
-       }
-       spin_unlock_irqrestore(&mchan->vc.lock, flags);