4.19-stable patches

added patches:
	revert-mips-alchemy-fix-dbdma2.patch

diff --git a/queue-4.19/revert-mips-alchemy-fix-dbdma2.patch b/queue-4.19/revert-mips-alchemy-fix-dbdma2.patch
new file mode 100644 (file)
index 0000000..9c140c3
--- /dev/null
+++ b/queue-4.19/revert-mips-alchemy-fix-dbdma2.patch
@@ -0,0 +1,81 @@
+From 1a4039bdcf972a7d2e469bb1a5ea616c4c2216fb Mon Sep 17 00:00:00 2001
+From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+Date: Thu, 31 Aug 2023 12:30:23 +0200
+Subject: Revert "MIPS: Alchemy: fix dbdma2"
+
+From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+This reverts commit a16419bae292d768546bcd6e0bfbf8a722756fee which is
+commit 2d645604f69f3a772d58ead702f9a8e84ab2b342 upstream.
+
+It breaks the build, so should be dropped.
+
+Reported-by: Guenter Roeck <linux@roeck-us.net>
+Link: https://lore.kernel.org/r/5b30ff73-46cb-1d1e-3823-f175dbfbd91b@roeck-us.net
+Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
+Cc: Sasha Levin <sashal@kernel.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ arch/mips/alchemy/common/dbdma.c |   27 ++++++++++++---------------
+ 1 file changed, 12 insertions(+), 15 deletions(-)
+
+--- a/arch/mips/alchemy/common/dbdma.c
++++ b/arch/mips/alchemy/common/dbdma.c
+@@ -30,7 +30,6 @@
+  *
+  */
+ 
+-#include <linux/dma-map-ops.h> /* for dma_default_coherent */
+ #include <linux/init.h>
+ #include <linux/kernel.h>
+ #include <linux/slab.h>
+@@ -624,18 +623,17 @@ u32 au1xxx_dbdma_put_source(u32 chanid,
+               dp->dscr_cmd0 &= ~DSCR_CMD0_IE;
+ 
+       /*
+-       * There is an erratum on certain Au1200/Au1550 revisions that could
+-       * result in "stale" data being DMA'ed. It has to do with the snoop
+-       * logic on the cache eviction buffer.  dma_default_coherent is set
+-       * to false on these parts.
++       * There is an errata on the Au1200/Au1550 parts that could result
++       * in "stale" data being DMA'ed. It has to do with the snoop logic on
++       * the cache eviction buffer.  DMA_NONCOHERENT is on by default for
++       * these parts. If it is fixed in the future, these dma_cache_inv will
++       * just be nothing more than empty macros. See io.h.
+        */
+-      if (!dma_default_coherent)
+-              dma_cache_wback_inv(KSEG0ADDR(buf), nbytes);
++      dma_cache_wback_inv((unsigned long)buf, nbytes);
+       dp->dscr_cmd0 |= DSCR_CMD0_V;   /* Let it rip */
+       wmb(); /* drain writebuffer */
+       dma_cache_wback_inv((unsigned long)dp, sizeof(*dp));
+       ctp->chan_ptr->ddma_dbell = 0;
+-      wmb(); /* force doorbell write out to dma engine */
+ 
+       /* Get next descriptor pointer. */
+       ctp->put_ptr = phys_to_virt(DSCR_GET_NXTPTR(dp->dscr_nxtptr));
+@@ -687,18 +685,17 @@ u32 au1xxx_dbdma_put_dest(u32 chanid, dm
+                         dp->dscr_source1, dp->dscr_dest0, dp->dscr_dest1);
+ #endif
+       /*
+-       * There is an erratum on certain Au1200/Au1550 revisions that could
+-       * result in "stale" data being DMA'ed. It has to do with the snoop
+-       * logic on the cache eviction buffer.  dma_default_coherent is set
+-       * to false on these parts.
++       * There is an errata on the Au1200/Au1550 parts that could result in
++       * "stale" data being DMA'ed. It has to do with the snoop logic on the
++       * cache eviction buffer.  DMA_NONCOHERENT is on by default for these
++       * parts. If it is fixed in the future, these dma_cache_inv will just
++       * be nothing more than empty macros. See io.h.
+        */
+-      if (!dma_default_coherent)
+-              dma_cache_inv(KSEG0ADDR(buf), nbytes);
++      dma_cache_inv((unsigned long)buf, nbytes);
+       dp->dscr_cmd0 |= DSCR_CMD0_V;   /* Let it rip */
+       wmb(); /* drain writebuffer */
+       dma_cache_wback_inv((unsigned long)dp, sizeof(*dp));
+       ctp->chan_ptr->ddma_dbell = 0;
+-      wmb(); /* force doorbell write out to dma engine */
+ 
+       /* Get next descriptor pointer. */
+       ctp->put_ptr = phys_to_virt(DSCR_GET_NXTPTR(dp->dscr_nxtptr));

diff --git a/queue-4.19/series b/queue-4.19/series
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..be0d4f997e22801453f4ab429aeb78afcbd74ffb 100644 (file)
--- a/queue-4.19/series
+++ b/queue-4.19/series
@@ -0,0 +1 @@
+revert-mips-alchemy-fix-dbdma2.patch