This reverts commit 0bf28fc40d89b1a3e00d1b79473bad4e9ca20ad1.
Reasons:
1. new panic()s shouldn't be added [1].
2. It does no "cleanup" but breaks MIPS [2].
v2: properly solved the conflict [3] with
commit 20347fca71a38 ("swiotlb: split up the global swiotlb lock")
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
[1] https://lore.kernel.org/r/CAHk-=wit-DmhMfQErY29JSPjFgebx_Ld+pnerc4J2Ag990WwAA@xxxxxxxxxxxxxx/
[2] https://lore.kernel.org/r/20220820012031.1285979-1-yuzhao@xxxxxxxxxx/
[3] https://lore.kernel.org/r/202208310701.LKr1WDCh-lkp@xxxxxxxxx/
Fixes: 0bf28fc40d89b ("swiotlb: panic if nslabs is too small")
Signed-off-by: Yu Zhao <yuzhao@xxxxxxxxxx>
---
kernel/dma/swiotlb.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index c5a9190b218f..dd8863987e0c 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -326,9 +326,6 @@ void __init swiotlb_init_remap(bool addressing_limit, unsigned int flags,
swiotlb_adjust_nareas(num_possible_cpus());
nslabs = default_nslabs;
- if (nslabs < IO_TLB_MIN_SLABS)
- panic("%s: nslabs = %lu too small\n", __func__, nslabs);
-
/*
* By default allocate the bounce buffer memory from low memory, but
* allow to pick a location everywhere for hypervisors with guest
@@ -341,8 +338,7 @@ void __init swiotlb_init_remap(bool addressing_limit, unsigned int flags,
else
tlb = memblock_alloc_low(bytes, PAGE_SIZE);
if (!tlb) {
- pr_warn("%s: Failed to allocate %zu bytes tlb structure\n",
- __func__, bytes);
+ pr_warn("%s: failed to allocate tlb structure\n", __func__);
return;
}
base-commit: dcf8e5633e2e69ad60b730ab5905608b756a032f
--
2.37.2.672.g94769d06f0-goog
