diff options
| author | Thorsten Blum <thorsten.blum@linux.dev> | 2026-07-11 15:09:32 +0200 |
|---|---|---|
| committer | Madhavan Srinivasan <maddy@linux.ibm.com> | 2026-07-28 10:23:31 +0530 |
| commit | 0bb024f11d120abff3e8db9144a585b9d7fb8459 (patch) | |
| tree | 6a1ceb926715ecd849e13ac8441da718b3db3293 | |
| parent | 41bf83c1b10781fcb992ff0680db771b7b833308 (diff) | |
powerpc/ps3: Fix map failure path in dma_ioc0_map_pages()
If lv1_put_iopte() fails in dma_ioc0_map_pages(), the error path
decrements iopage but keeps using the failed mapping's offset. As a
result, it repeatedly tries to invalidate the failed IOPTE slot and
leaves the already installed IOPTEs valid.
Recompute offset and invalidate the installed IOPTEs instead.
Fixes: 6bb5cf102541 ("[POWERPC] PS3: System-bus rework")
Cc: stable@vger.kernel.org
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20260711130931.740719-3-thorsten.blum@linux.dev
| -rw-r--r-- | arch/powerpc/platforms/ps3/mm.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/ps3/mm.c b/arch/powerpc/platforms/ps3/mm.c index 20fc5b68faee..315a32fd75b1 100644 --- a/arch/powerpc/platforms/ps3/mm.c +++ b/arch/powerpc/platforms/ps3/mm.c @@ -615,6 +615,7 @@ static int dma_ioc0_map_pages(struct ps3_dma_region *r, unsigned long phys_addr, fail_map: for (iopage--; 0 <= iopage; iopage--) { + offset = (1 << r->page_size) * iopage; lv1_put_iopte(0, c->bus_addr + offset, c->lpar_addr + offset, |